https://openjdk.java.net/ 
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 * Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package java.awt;

import java.beans.ConstructorProperties;
import java.awt.image.ColorModel;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.color.ColorSpace;


The Color class is used to encapsulate colors in the default sRGB color space or colors in arbitrary color spaces identified by a ColorSpace. Every color has an implicit alpha value of 1.0 or an explicit one provided in the constructor. The alpha value defines the transparency of a color and can be represented by a float value in the range 0.0 - 1.0 or 0 - 255. An alpha value of 1.0 or 255 means that the color is completely opaque and an alpha value of 0 or 0.0 means that the color is completely transparent. When constructing a Color with an explicit alpha or
getting the color/alpha components of a Color, the color
components are never premultiplied by the alpha component.


The default color space for the Java 2D(tm) API is sRGB, a proposed
standard RGB color space.  For further information on sRGB,
see 
http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html
.



Author:     Sami Shaio,      Arthur van Hoff
See Also:
Version:    10 Feb 1997
/**
 * The <code>Color</code> class is used to encapsulate colors in the default
 * sRGB color space or colors in arbitrary color spaces identified by a
 * {@link ColorSpace}.  Every color has an implicit alpha value of 1.0 or
 * an explicit one provided in the constructor.  The alpha value
 * defines the transparency of a color and can be represented by
 * a float value in the range 0.0&nbsp;-&nbsp;1.0 or 0&nbsp;-&nbsp;255.
 * An alpha value of 1.0 or 255 means that the color is completely
 * opaque and an alpha value of 0 or 0.0 means that the color is
 * completely transparent.
 * When constructing a <code>Color</code> with an explicit alpha or
 * getting the color/alpha components of a <code>Color</code>, the color
 * components are never premultiplied by the alpha component.
 * <p>
 * The default color space for the Java 2D(tm) API is sRGB, a proposed
 * standard RGB color space.  For further information on sRGB,
 * see <A href="http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html">
 * http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html
 * </A>.
 * <p>
 * @version     10 Feb 1997
 * @author      Sami Shaio
 * @author      Arthur van Hoff
 * @see         ColorSpace
 * @see         AlphaComposite
 */
public class Color implements Paint, java.io.Serializable {

    
The color white.  In the default sRGB space.

/**
     * The color white.  In the default sRGB space.
     */
    public final static Color white     = new Color(255, 255, 255);

    
The color white.  In the default sRGB space.

Since:1.4
/**
     * The color white.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color WHITE = white;

    
The color light gray.  In the default sRGB space.

/**
     * The color light gray.  In the default sRGB space.
     */
    public final static Color lightGray = new Color(192, 192, 192);

    
The color light gray.  In the default sRGB space.

Since:1.4
/**
     * The color light gray.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color LIGHT_GRAY = lightGray;

    
The color gray.  In the default sRGB space.

/**
     * The color gray.  In the default sRGB space.
     */
    public final static Color gray      = new Color(128, 128, 128);

    
The color gray.  In the default sRGB space.

Since:1.4
/**
     * The color gray.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color GRAY = gray;

    
The color dark gray.  In the default sRGB space.

/**
     * The color dark gray.  In the default sRGB space.
     */
    public final static Color darkGray  = new Color(64, 64, 64);

    
The color dark gray.  In the default sRGB space.

Since:1.4
/**
     * The color dark gray.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color DARK_GRAY = darkGray;

    
The color black.  In the default sRGB space.

/**
     * The color black.  In the default sRGB space.
     */
    public final static Color black     = new Color(0, 0, 0);

    
The color black.  In the default sRGB space.

Since:1.4
/**
     * The color black.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color BLACK = black;

    
The color red.  In the default sRGB space.

/**
     * The color red.  In the default sRGB space.
     */
    public final static Color red       = new Color(255, 0, 0);

    
The color red.  In the default sRGB space.

Since:1.4
/**
     * The color red.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color RED = red;

    
The color pink.  In the default sRGB space.

/**
     * The color pink.  In the default sRGB space.
     */
    public final static Color pink      = new Color(255, 175, 175);

    
The color pink.  In the default sRGB space.

Since:1.4
/**
     * The color pink.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color PINK = pink;

    
The color orange.  In the default sRGB space.

/**
     * The color orange.  In the default sRGB space.
     */
    public final static Color orange    = new Color(255, 200, 0);

    
The color orange.  In the default sRGB space.

Since:1.4
/**
     * The color orange.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color ORANGE = orange;

    
The color yellow.  In the default sRGB space.

/**
     * The color yellow.  In the default sRGB space.
     */
    public final static Color yellow    = new Color(255, 255, 0);

    
The color yellow.  In the default sRGB space.

Since:1.4
/**
     * The color yellow.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color YELLOW = yellow;

    
The color green.  In the default sRGB space.

/**
     * The color green.  In the default sRGB space.
     */
    public final static Color green     = new Color(0, 255, 0);

    
The color green.  In the default sRGB space.

Since:1.4
/**
     * The color green.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color GREEN = green;

    
The color magenta.  In the default sRGB space.

/**
     * The color magenta.  In the default sRGB space.
     */
    public final static Color magenta   = new Color(255, 0, 255);

    
The color magenta.  In the default sRGB space.

Since:1.4
/**
     * The color magenta.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color MAGENTA = magenta;

    
The color cyan.  In the default sRGB space.

/**
     * The color cyan.  In the default sRGB space.
     */
    public final static Color cyan      = new Color(0, 255, 255);

    
The color cyan.  In the default sRGB space.

Since:1.4
/**
     * The color cyan.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color CYAN = cyan;

    
The color blue.  In the default sRGB space.

/**
     * The color blue.  In the default sRGB space.
     */
    public final static Color blue      = new Color(0, 0, 255);

    
The color blue.  In the default sRGB space.

Since:1.4
/**
     * The color blue.  In the default sRGB space.
     * @since 1.4
     */
    public final static Color BLUE = blue;

    
The color value.

See Also:
@serial
/**
     * The color value.
     * @serial
     * @see #getRGB
     */
    int value;

    
The color value in the default sRGB ColorSpace as
float components (no alpha).
If null after object construction, this must be an
sRGB color constructed with 8-bit precision, so compute from the
int color value.

See Also:
@serial
/**
     * The color value in the default sRGB <code>ColorSpace</code> as
     * <code>float</code> components (no alpha).
     * If <code>null</code> after object construction, this must be an
     * sRGB color constructed with 8-bit precision, so compute from the
     * <code>int</code> color value.
     * @serial
     * @see #getRGBColorComponents
     * @see #getRGBComponents
     */
    private float frgbvalue[] = null;

    
The color value in the native ColorSpace as
float components (no alpha).
If null after object construction, this must be an
sRGB color constructed with 8-bit precision, so compute from the
int color value.

See Also:
@serial
/**
     * The color value in the native <code>ColorSpace</code> as
     * <code>float</code> components (no alpha).
     * If <code>null</code> after object construction, this must be an
     * sRGB color constructed with 8-bit precision, so compute from the
     * <code>int</code> color value.
     * @serial
     * @see #getRGBColorComponents
     * @see #getRGBComponents
     */
    private float fvalue[] = null;

    
The alpha value as a float component.
If frgbvalue is null, this is not valid
data, so compute from the int color value.

See Also:
@serial
/**
     * The alpha value as a <code>float</code> component.
     * If <code>frgbvalue</code> is <code>null</code>, this is not valid
     * data, so compute from the <code>int</code> color value.
     * @serial
     * @see #getRGBComponents
     * @see #getComponents
     */
    private float falpha = 0.0f;

    
The ColorSpace.  If null, then it's
default is sRGB.

See Also:
@serial
/**
     * The <code>ColorSpace</code>.  If <code>null</code>, then it's
     * default is sRGB.
     * @serial
     * @see #getColor
     * @see #getColorSpace
     * @see #getColorComponents
     */
    private ColorSpace cs = null;

    /*
     * JDK 1.1 serialVersionUID
     */
     private static final long serialVersionUID = 118526816881161077L;

    
Initialize JNI field and method IDs

/**
     * Initialize JNI field and method IDs
     */
    private static native void initIDs();

    static {
        /** 4112352 - Calling getDefaultToolkit()
         ** here can cause this class to be accessed before it is fully
         ** initialized. DON'T DO IT!!!
         **
         ** Toolkit.getDefaultToolkit();
         **/

        /* ensure that the necessary native libraries are loaded */
        Toolkit.loadLibraries();
        if (!GraphicsEnvironment.isHeadless()) {
            initIDs();
        }
    }

    
Checks the color integer components supplied for validity. Throws an IllegalArgumentException if the value is out of range. 
Params:
  • r – the Red component
  • g – the Green component
  • b – the Blue component
/**
     * Checks the color integer components supplied for validity.
     * Throws an {@link IllegalArgumentException} if the value is out of
     * range.
     * @param r the Red component
     * @param g the Green component
     * @param b the Blue component
     **/
    private static void testColorValueRange(int r, int g, int b, int a) {
        boolean rangeError = false;
        String badComponentString = "";

        if ( a < 0 || a > 255) {
            rangeError = true;
            badComponentString = badComponentString + " Alpha";
        }
        if ( r < 0 || r > 255) {
            rangeError = true;
            badComponentString = badComponentString + " Red";
        }
        if ( g < 0 || g > 255) {
            rangeError = true;
            badComponentString = badComponentString + " Green";
        }
        if ( b < 0 || b > 255) {
            rangeError = true;
            badComponentString = badComponentString + " Blue";
        }
        if ( rangeError == true ) {
        throw new IllegalArgumentException("Color parameter outside of expected range:"
                                           + badComponentString);
        }
    }

    
Checks the color float components supplied for
validity.
Throws an IllegalArgumentException if the value is out
of range.

Params:
  • r – the Red component
  • g – the Green component
  • b – the Blue component
/**
     * Checks the color <code>float</code> components supplied for
     * validity.
     * Throws an <code>IllegalArgumentException</code> if the value is out
     * of range.
     * @param r the Red component
     * @param g the Green component
     * @param b the Blue component
     **/
    private static void testColorValueRange(float r, float g, float b, float a) {
        boolean rangeError = false;
        String badComponentString = "";
        if ( a < 0.0 || a > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + " Alpha";
        }
        if ( r < 0.0 || r > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + " Red";
        }
        if ( g < 0.0 || g > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + " Green";
        }
        if ( b < 0.0 || b > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + " Blue";
        }
        if ( rangeError == true ) {
        throw new IllegalArgumentException("Color parameter outside of expected range:"
                                           + badComponentString);
        }
    }

    
Creates an opaque sRGB color with the specified red, green,
and blue values in the range (0 - 255).
The actual color used in rendering depends
on finding the best match given the color space
available for a given output device.
Alpha is defaulted to 255.

Params:
  • r – the red component
  • g – the green component
  • b – the blue component
Throws:
  • IllegalArgumentException – if r, g
       or b are outside of the range
       0 to 255, inclusive
See Also:
/**
     * Creates an opaque sRGB color with the specified red, green,
     * and blue values in the range (0 - 255).
     * The actual color used in rendering depends
     * on finding the best match given the color space
     * available for a given output device.
     * Alpha is defaulted to 255.
     *
     * @throws IllegalArgumentException if <code>r</code>, <code>g</code>
     *        or <code>b</code> are outside of the range
     *        0 to 255, inclusive
     * @param r the red component
     * @param g the green component
     * @param b the blue component
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getRGB
     */
    public Color(int r, int g, int b) {
        this(r, g, b, 255);
    }

    
Creates an sRGB color with the specified red, green, blue, and alpha
values in the range (0 - 255).

Params:
  • r – the red component
  • g – the green component
  • b – the blue component
  • a – the alpha component
Throws:
  • IllegalArgumentException – if r, g,
       b or a are outside of the range
       0 to 255, inclusive
See Also:
/**
     * Creates an sRGB color with the specified red, green, blue, and alpha
     * values in the range (0 - 255).
     *
     * @throws IllegalArgumentException if <code>r</code>, <code>g</code>,
     *        <code>b</code> or <code>a</code> are outside of the range
     *        0 to 255, inclusive
     * @param r the red component
     * @param g the green component
     * @param b the blue component
     * @param a the alpha component
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getAlpha
     * @see #getRGB
     */
    @ConstructorProperties({"red", "green", "blue", "alpha"})
    public Color(int r, int g, int b, int a) {
        value = ((a & 0xFF) << 24) |
                ((r & 0xFF) << 16) |
                ((g & 0xFF) << 8)  |
                ((b & 0xFF) << 0);
        testColorValueRange(r,g,b,a);
    }

    
Creates an opaque sRGB color with the specified combined RGB value
consisting of the red component in bits 16-23, the green component
in bits 8-15, and the blue component in bits 0-7.  The actual color
used in rendering depends on finding the best match given the
color space available for a particular output device.  Alpha is
defaulted to 255.

Params:
  • rgb – the combined RGB components
See Also:
/**
     * Creates an opaque sRGB color with the specified combined RGB value
     * consisting of the red component in bits 16-23, the green component
     * in bits 8-15, and the blue component in bits 0-7.  The actual color
     * used in rendering depends on finding the best match given the
     * color space available for a particular output device.  Alpha is
     * defaulted to 255.
     *
     * @param rgb the combined RGB components
     * @see java.awt.image.ColorModel#getRGBdefault
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getRGB
     */
    public Color(int rgb) {
        value = 0xff000000 | rgb;
    }

    
Creates an sRGB color with the specified combined RGBA value consisting
of the alpha component in bits 24-31, the red component in bits 16-23,
the green component in bits 8-15, and the blue component in bits 0-7.
If the hasalpha argument is false, alpha
is defaulted to 255.

Params:
  • rgba – the combined RGBA components
  • hasalpha – true if the alpha bits are valid;
       false otherwise
See Also:
/**
     * Creates an sRGB color with the specified combined RGBA value consisting
     * of the alpha component in bits 24-31, the red component in bits 16-23,
     * the green component in bits 8-15, and the blue component in bits 0-7.
     * If the <code>hasalpha</code> argument is <code>false</code>, alpha
     * is defaulted to 255.
     *
     * @param rgba the combined RGBA components
     * @param hasalpha <code>true</code> if the alpha bits are valid;
     *        <code>false</code> otherwise
     * @see java.awt.image.ColorModel#getRGBdefault
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getAlpha
     * @see #getRGB
     */
    public Color(int rgba, boolean hasalpha) {
        if (hasalpha) {
            value = rgba;
        } else {
            value = 0xff000000 | rgba;
        }
    }

    
Creates an opaque sRGB color with the specified red, green, and blue
values in the range (0.0 - 1.0).  Alpha is defaulted to 1.0.  The
actual color used in rendering depends on finding the best
match given the color space available for a particular output
device.

Params:
  • r – the red component
  • g – the green component
  • b – the blue component
Throws:
  • IllegalArgumentException – if r, g
       or b are outside of the range
       0.0 to 1.0, inclusive
See Also:
/**
     * Creates an opaque sRGB color with the specified red, green, and blue
     * values in the range (0.0 - 1.0).  Alpha is defaulted to 1.0.  The
     * actual color used in rendering depends on finding the best
     * match given the color space available for a particular output
     * device.
     *
     * @throws IllegalArgumentException if <code>r</code>, <code>g</code>
     *        or <code>b</code> are outside of the range
     *        0.0 to 1.0, inclusive
     * @param r the red component
     * @param g the green component
     * @param b the blue component
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getRGB
     */
    public Color(float r, float g, float b) {
        this( (int) (r*255+0.5), (int) (g*255+0.5), (int) (b*255+0.5));
        testColorValueRange(r,g,b,1.0f);
        frgbvalue = new float[3];
        frgbvalue[0] = r;
        frgbvalue[1] = g;
        frgbvalue[2] = b;
        falpha = 1.0f;
        fvalue = frgbvalue;
    }

    
Creates an sRGB color with the specified red, green, blue, and
alpha values in the range (0.0 - 1.0).  The actual color
used in rendering depends on finding the best match given the
color space available for a particular output device.

Params:
  • r – the red component
  • g – the green component
  • b – the blue component
  • a – the alpha component
Throws:
  • IllegalArgumentException – if r, g
       b or a are outside of the range
       0.0 to 1.0, inclusive
See Also:
/**
     * Creates an sRGB color with the specified red, green, blue, and
     * alpha values in the range (0.0 - 1.0).  The actual color
     * used in rendering depends on finding the best match given the
     * color space available for a particular output device.
     * @throws IllegalArgumentException if <code>r</code>, <code>g</code>
     *        <code>b</code> or <code>a</code> are outside of the range
     *        0.0 to 1.0, inclusive
     * @param r the red component
     * @param g the green component
     * @param b the blue component
     * @param a the alpha component
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @see #getAlpha
     * @see #getRGB
     */
    public Color(float r, float g, float b, float a) {
        this((int)(r*255+0.5), (int)(g*255+0.5), (int)(b*255+0.5), (int)(a*255+0.5));
        frgbvalue = new float[3];
        frgbvalue[0] = r;
        frgbvalue[1] = g;
        frgbvalue[2] = b;
        falpha = a;
        fvalue = frgbvalue;
    }

    
Creates a color in the specified ColorSpace
with the color components specified in the float
array and the specified alpha.  The number of components is
determined by the type of the ColorSpace.  For
example, RGB requires 3 components, but CMYK requires 4
components.

Params:
  • cspace – the ColorSpace to be used to
                 interpret the components
  • components – an arbitrary number of color components
                     that is compatible with the ColorSpace
  • alpha – alpha value
Throws:
See Also:
/**
     * Creates a color in the specified <code>ColorSpace</code>
     * with the color components specified in the <code>float</code>
     * array and the specified alpha.  The number of components is
     * determined by the type of the <code>ColorSpace</code>.  For
     * example, RGB requires 3 components, but CMYK requires 4
     * components.
     * @param cspace the <code>ColorSpace</code> to be used to
     *                  interpret the components
     * @param components an arbitrary number of color components
     *                      that is compatible with the <code>ColorSpace</code>
     * @param alpha alpha value
     * @throws IllegalArgumentException if any of the values in the
     *         <code>components</code> array or <code>alpha</code> is
     *         outside of the range 0.0 to 1.0
     * @see #getComponents
     * @see #getColorComponents
     */
    public Color(ColorSpace cspace, float components[], float alpha) {
        boolean rangeError = false;
        String badComponentString = "";
        int n = cspace.getNumComponents();
        fvalue = new float[n];
        for (int i = 0; i < n; i++) {
            if (components[i] < 0.0 || components[i] > 1.0) {
                rangeError = true;
                badComponentString = badComponentString + "Component " + i
                                     + " ";
            } else {
                fvalue[i] = components[i];
            }
        }
        if (alpha < 0.0 || alpha > 1.0) {
            rangeError = true;
            badComponentString = badComponentString + "Alpha";
        } else {
            falpha = alpha;
        }
        if (rangeError) {
            throw new IllegalArgumentException(
                "Color parameter outside of expected range: " +
                badComponentString);
        }
        frgbvalue = cspace.toRGB(fvalue);
        cs = cspace;
        value = ((((int)(falpha*255)) & 0xFF) << 24) |
                ((((int)(frgbvalue[0]*255)) & 0xFF) << 16) |
                ((((int)(frgbvalue[1]*255)) & 0xFF) << 8)  |
                ((((int)(frgbvalue[2]*255)) & 0xFF) << 0);
    }

    
Returns the red component in the range 0-255 in the default sRGB
space.

See Also:
Returns:the red component.
/**
     * Returns the red component in the range 0-255 in the default sRGB
     * space.
     * @return the red component.
     * @see #getRGB
     */
    public int getRed() {
        return (getRGB() >> 16) & 0xFF;
    }

    
Returns the green component in the range 0-255 in the default sRGB
space.

See Also:
Returns:the green component.
/**
     * Returns the green component in the range 0-255 in the default sRGB
     * space.
     * @return the green component.
     * @see #getRGB
     */
    public int getGreen() {
        return (getRGB() >> 8) & 0xFF;
    }

    
Returns the blue component in the range 0-255 in the default sRGB
space.

See Also:
Returns:the blue component.
/**
     * Returns the blue component in the range 0-255 in the default sRGB
     * space.
     * @return the blue component.
     * @see #getRGB
     */
    public int getBlue() {
        return (getRGB() >> 0) & 0xFF;
    }

    
Returns the alpha component in the range 0-255.

See Also:
Returns:the alpha component.
/**
     * Returns the alpha component in the range 0-255.
     * @return the alpha component.
     * @see #getRGB
     */
    public int getAlpha() {
        return (getRGB() >> 24) & 0xff;
    }

    
Returns the RGB value representing the color in the default sRGB ColorModel. (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are blue). 
See Also:
Returns:the RGB value of the color in the default sRGB
        ColorModel.
Since:JDK1.0
/**
     * Returns the RGB value representing the color in the default sRGB
     * {@link ColorModel}.
     * (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are
     * blue).
     * @return the RGB value of the color in the default sRGB
     *         <code>ColorModel</code>.
     * @see java.awt.image.ColorModel#getRGBdefault
     * @see #getRed
     * @see #getGreen
     * @see #getBlue
     * @since JDK1.0
     */
    public int getRGB() {
        return value;
    }

    private static final double FACTOR = 0.7;

    
Creates a new Color that is a brighter version of this
Color.


This method applies an arbitrary scale factor to each of the three RGB
components of this Color to create a brighter version
of this Color. The alpha value is preserved. Although brighter and
darker are inverse operations, the results of a
series of invocations of these two methods might be inconsistent
because of rounding errors.

See Also:
Returns:    a new Color object that is
                a brighter version of this Color with the same alpha value.
Since:     JDK1.0
/**
     * Creates a new <code>Color</code> that is a brighter version of this
     * <code>Color</code>.
     * <p>
     * This method applies an arbitrary scale factor to each of the three RGB
     * components of this <code>Color</code> to create a brighter version
     * of this <code>Color</code>.
     * The {@code alpha} value is preserved.
     * Although <code>brighter</code> and
     * <code>darker</code> are inverse operations, the results of a
     * series of invocations of these two methods might be inconsistent
     * because of rounding errors.
     * @return     a new <code>Color</code> object that is
     *                 a brighter version of this <code>Color</code>
     *                 with the same {@code alpha} value.
     * @see        java.awt.Color#darker
     * @since      JDK1.0
     */
    public Color brighter() {
        int r = getRed();
        int g = getGreen();
        int b = getBlue();
        int alpha = getAlpha();

        /* From 2D group:
         * 1. black.brighter() should return grey
         * 2. applying brighter to blue will always return blue, brighter
         * 3. non pure color (non zero rgb) will eventually return white
         */
        int i = (int)(1.0/(1.0-FACTOR));
        if ( r == 0 && g == 0 && b == 0) {
            return new Color(i, i, i, alpha);
        }
        if ( r > 0 && r < i ) r = i;
        if ( g > 0 && g < i ) g = i;
        if ( b > 0 && b < i ) b = i;

        return new Color(Math.min((int)(r/FACTOR), 255),
                         Math.min((int)(g/FACTOR), 255),
                         Math.min((int)(b/FACTOR), 255),
                         alpha);
    }

    
Creates a new Color that is a darker version of this
Color.


This method applies an arbitrary scale factor to each of the three RGB
components of this Color to create a darker version of
this Color. The alpha value is preserved. Although brighter and
darker are inverse operations, the results of a series
of invocations of these two methods might be inconsistent because
of rounding errors.

See Also:
Returns: a new Color object that is
                   a darker version of this Color with the same alpha value.
Since:     JDK1.0
/**
     * Creates a new <code>Color</code> that is a darker version of this
     * <code>Color</code>.
     * <p>
     * This method applies an arbitrary scale factor to each of the three RGB
     * components of this <code>Color</code> to create a darker version of
     * this <code>Color</code>.
     * The {@code alpha} value is preserved.
     * Although <code>brighter</code> and
     * <code>darker</code> are inverse operations, the results of a series
     * of invocations of these two methods might be inconsistent because
     * of rounding errors.
     * @return  a new <code>Color</code> object that is
     *                    a darker version of this <code>Color</code>
     *                    with the same {@code alpha} value.
     * @see        java.awt.Color#brighter
     * @since      JDK1.0
     */
    public Color darker() {
        return new Color(Math.max((int)(getRed()  *FACTOR), 0),
                         Math.max((int)(getGreen()*FACTOR), 0),
                         Math.max((int)(getBlue() *FACTOR), 0),
                         getAlpha());
    }

    
Computes the hash code for this Color.

Returns:    a hash code value for this object.
Since:     JDK1.0
/**
     * Computes the hash code for this <code>Color</code>.
     * @return     a hash code value for this object.
     * @since      JDK1.0
     */
    public int hashCode() {
        return value;
    }

    
Determines whether another object is equal to this
Color.


The result is true if and only if the argument is not
null and is a Color object that has the same
red, green, blue, and alpha values as this object.

Params:
  • obj –   the object to test for equality with this
                         Color
Returns:     true if the objects are the same;
                            false otherwise.
Since:  JDK1.0
/**
     * Determines whether another object is equal to this
     * <code>Color</code>.
     * <p>
     * The result is <code>true</code> if and only if the argument is not
     * <code>null</code> and is a <code>Color</code> object that has the same
     * red, green, blue, and alpha values as this object.
     * @param       obj   the object to test for equality with this
     *                          <code>Color</code>
     * @return      <code>true</code> if the objects are the same;
     *                             <code>false</code> otherwise.
     * @since   JDK1.0
     */
    public boolean equals(Object obj) {
        return obj instanceof Color && ((Color)obj).getRGB() == this.getRGB();
    }

    
Returns a string representation of this Color. This
method is intended to be used only for debugging purposes.  The
content and format of the returned string might vary between
implementations. The returned string might be empty but cannot
be null.

Returns: a string representation of this Color.
/**
     * Returns a string representation of this <code>Color</code>. This
     * method is intended to be used only for debugging purposes.  The
     * content and format of the returned string might vary between
     * implementations. The returned string might be empty but cannot
     * be <code>null</code>.
     *
     * @return  a string representation of this <code>Color</code>.
     */
    public String toString() {
        return getClass().getName() + "[r=" + getRed() + ",g=" + getGreen() + ",b=" + getBlue() + "]";
    }

    
Converts a String to an integer and returns the
specified opaque Color. This method handles string
formats that are used to represent octal and hexadecimal numbers.

Params:
  • nm – a String that represents
                           an opaque color as a 24-bit integer
Throws:
  • NumberFormatException –  if the specified string cannot
                     be interpreted as a decimal,
                     octal, or hexadecimal integer.
See Also:
Returns:    the new Color object.
Since:     JDK1.1
/**
     * Converts a <code>String</code> to an integer and returns the
     * specified opaque <code>Color</code>. This method handles string
     * formats that are used to represent octal and hexadecimal numbers.
     * @param      nm a <code>String</code> that represents
     *                            an opaque color as a 24-bit integer
     * @return     the new <code>Color</code> object.
     * @see        java.lang.Integer#decode
     * @exception  NumberFormatException  if the specified string cannot
     *                      be interpreted as a decimal,
     *                      octal, or hexadecimal integer.
     * @since      JDK1.1
     */
    public static Color decode(String nm) throws NumberFormatException {
        Integer intval = Integer.decode(nm);
        int i = intval.intValue();
        return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF);
    }

    
Finds a color in the system properties.


The argument is treated as the name of a system property to
be obtained. The string value of this property is then interpreted
as an integer which is then converted to a Color
object.


If the specified property is not found or could not be parsed as
an integer then null is returned.

Params:
  • nm – the name of the color property
See Also:
Returns:  the Color converted from the system
         property.
Since:   JDK1.0
/**
     * Finds a color in the system properties.
     * <p>
     * The argument is treated as the name of a system property to
     * be obtained. The string value of this property is then interpreted
     * as an integer which is then converted to a <code>Color</code>
     * object.
     * <p>
     * If the specified property is not found or could not be parsed as
     * an integer then <code>null</code> is returned.
     * @param    nm the name of the color property
     * @return   the <code>Color</code> converted from the system
     *          property.
     * @see      java.lang.System#getProperty(java.lang.String)
     * @see      java.lang.Integer#getInteger(java.lang.String)
     * @see      java.awt.Color#Color(int)
     * @since    JDK1.0
     */
    public static Color getColor(String nm) {
        return getColor(nm, null);
    }

    
Finds a color in the system properties.


The first argument is treated as the name of a system property to
be obtained. The string value of this property is then interpreted
as an integer which is then converted to a Color
object.


If the specified property is not found or cannot be parsed as
an integer then the Color specified by the second
argument is returned instead.

Params:
  • nm – the name of the color property
  • v –    the default Color
See Also:
Returns:  the Color converted from the system
         property, or the specified Color.
Since:   JDK1.0
/**
     * Finds a color in the system properties.
     * <p>
     * The first argument is treated as the name of a system property to
     * be obtained. The string value of this property is then interpreted
     * as an integer which is then converted to a <code>Color</code>
     * object.
     * <p>
     * If the specified property is not found or cannot be parsed as
     * an integer then the <code>Color</code> specified by the second
     * argument is returned instead.
     * @param    nm the name of the color property
     * @param    v    the default <code>Color</code>
     * @return   the <code>Color</code> converted from the system
     *          property, or the specified <code>Color</code>.
     * @see      java.lang.System#getProperty(java.lang.String)
     * @see      java.lang.Integer#getInteger(java.lang.String)
     * @see      java.awt.Color#Color(int)
     * @since    JDK1.0
     */
    public static Color getColor(String nm, Color v) {
        Integer intval = Integer.getInteger(nm);
        if (intval == null) {
            return v;
        }
        int i = intval.intValue();
        return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF);
    }

    
Finds a color in the system properties.


The first argument is treated as the name of a system property to
be obtained. The string value of this property is then interpreted
as an integer which is then converted to a Color
object.


If the specified property is not found or could not be parsed as
an integer then the integer value v is used instead,
and is converted to a Color object.

Params:
  • nm –  the name of the color property
  • v –   the default color value, as an integer
See Also:
Returns:  the Color converted from the system
         property or the Color converted from
         the specified integer.
Since:   JDK1.0
/**
     * Finds a color in the system properties.
     * <p>
     * The first argument is treated as the name of a system property to
     * be obtained. The string value of this property is then interpreted
     * as an integer which is then converted to a <code>Color</code>
     * object.
     * <p>
     * If the specified property is not found or could not be parsed as
     * an integer then the integer value <code>v</code> is used instead,
     * and is converted to a <code>Color</code> object.
     * @param    nm  the name of the color property
     * @param    v   the default color value, as an integer
     * @return   the <code>Color</code> converted from the system
     *          property or the <code>Color</code> converted from
     *          the specified integer.
     * @see      java.lang.System#getProperty(java.lang.String)
     * @see      java.lang.Integer#getInteger(java.lang.String)
     * @see      java.awt.Color#Color(int)
     * @since    JDK1.0
     */
    public static Color getColor(String nm, int v) {
        Integer intval = Integer.getInteger(nm);
        int i = (intval != null) ? intval.intValue() : v;
        return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, (i >> 0) & 0xFF);
    }

    
Converts the components of a color, as specified by the HSB
model, to an equivalent set of values for the default RGB model.


The saturation and brightness components
should be floating-point values between zero and one
(numbers in the range 0.0-1.0).  The hue component
can be any floating-point number.  The floor of this number is
subtracted from it to create a fraction between 0 and 1.  This
fractional number is then multiplied by 360 to produce the hue
angle in the HSB color model.


The integer that is returned by HSBtoRGB encodes the value of a color in bits 0-23 of an integer value that is the same format used by the method getRGB. This integer can be supplied as an argument to the Color constructor that takes a single integer argument.

Params:
  • hue –   the hue component of the color
  • saturation –   the saturation of the color
  • brightness –   the brightness of the color
See Also:
Returns:   the RGB value of the color with the indicated hue,
                           saturation, and brightness.
Since:    JDK1.0
/**
     * Converts the components of a color, as specified by the HSB
     * model, to an equivalent set of values for the default RGB model.
     * <p>
     * The <code>saturation</code> and <code>brightness</code> components
     * should be floating-point values between zero and one
     * (numbers in the range 0.0-1.0).  The <code>hue</code> component
     * can be any floating-point number.  The floor of this number is
     * subtracted from it to create a fraction between 0 and 1.  This
     * fractional number is then multiplied by 360 to produce the hue
     * angle in the HSB color model.
     * <p>
     * The integer that is returned by <code>HSBtoRGB</code> encodes the
     * value of a color in bits 0-23 of an integer value that is the same
     * format used by the method {@link #getRGB() getRGB}.
     * This integer can be supplied as an argument to the
     * <code>Color</code> constructor that takes a single integer argument.
     * @param     hue   the hue component of the color
     * @param     saturation   the saturation of the color
     * @param     brightness   the brightness of the color
     * @return    the RGB value of the color with the indicated hue,
     *                            saturation, and brightness.
     * @see       java.awt.Color#getRGB()
     * @see       java.awt.Color#Color(int)
     * @see       java.awt.image.ColorModel#getRGBdefault()
     * @since     JDK1.0
     */
    public static int HSBtoRGB(float hue, float saturation, float brightness) {
        int r = 0, g = 0, b = 0;
        if (saturation == 0) {
            r = g = b = (int) (brightness * 255.0f + 0.5f);
        } else {
            float h = (hue - (float)Math.floor(hue)) * 6.0f;
            float f = h - (float)java.lang.Math.floor(h);
            float p = brightness * (1.0f - saturation);
            float q = brightness * (1.0f - saturation * f);
            float t = brightness * (1.0f - (saturation * (1.0f - f)));
            switch ((int) h) {
            case 0:
                r = (int) (brightness * 255.0f + 0.5f);
                g = (int) (t * 255.0f + 0.5f);
                b = (int) (p * 255.0f + 0.5f);
                break;
            case 1:
                r = (int) (q * 255.0f + 0.5f);
                g = (int) (brightness * 255.0f + 0.5f);
                b = (int) (p * 255.0f + 0.5f);
                break;
            case 2:
                r = (int) (p * 255.0f + 0.5f);
                g = (int) (brightness * 255.0f + 0.5f);
                b = (int) (t * 255.0f + 0.5f);
                break;
            case 3:
                r = (int) (p * 255.0f + 0.5f);
                g = (int) (q * 255.0f + 0.5f);
                b = (int) (brightness * 255.0f + 0.5f);
                break;
            case 4:
                r = (int) (t * 255.0f + 0.5f);
                g = (int) (p * 255.0f + 0.5f);
                b = (int) (brightness * 255.0f + 0.5f);
                break;
            case 5:
                r = (int) (brightness * 255.0f + 0.5f);
                g = (int) (p * 255.0f + 0.5f);
                b = (int) (q * 255.0f + 0.5f);
                break;
            }
        }
        return 0xff000000 | (r << 16) | (g << 8) | (b << 0);
    }

    
Converts the components of a color, as specified by the default RGB
model, to an equivalent set of values for hue, saturation, and
brightness that are the three components of the HSB model.


If the hsbvals argument is null, then a
new array is allocated to return the result. Otherwise, the method
returns the array hsbvals, with the values put into
that array.

Params:
  • r –   the red component of the color
  • g –   the green component of the color
  • b –   the blue component of the color
  • hsbvals –  the array used to return the
                    three HSB values, or null
See Also:
Returns:   an array of three elements containing the hue, saturation,
                    and brightness (in that order), of the color with
                    the indicated red, green, and blue components.
Since:    JDK1.0
/**
     * Converts the components of a color, as specified by the default RGB
     * model, to an equivalent set of values for hue, saturation, and
     * brightness that are the three components of the HSB model.
     * <p>
     * If the <code>hsbvals</code> argument is <code>null</code>, then a
     * new array is allocated to return the result. Otherwise, the method
     * returns the array <code>hsbvals</code>, with the values put into
     * that array.
     * @param     r   the red component of the color
     * @param     g   the green component of the color
     * @param     b   the blue component of the color
     * @param     hsbvals  the array used to return the
     *                     three HSB values, or <code>null</code>
     * @return    an array of three elements containing the hue, saturation,
     *                     and brightness (in that order), of the color with
     *                     the indicated red, green, and blue components.
     * @see       java.awt.Color#getRGB()
     * @see       java.awt.Color#Color(int)
     * @see       java.awt.image.ColorModel#getRGBdefault()
     * @since     JDK1.0
     */
    public static float[] RGBtoHSB(int r, int g, int b, float[] hsbvals) {
        float hue, saturation, brightness;
        if (hsbvals == null) {
            hsbvals = new float[3];
        }
        int cmax = (r > g) ? r : g;
        if (b > cmax) cmax = b;
        int cmin = (r < g) ? r : g;
        if (b < cmin) cmin = b;

        brightness = ((float) cmax) / 255.0f;
        if (cmax != 0)
            saturation = ((float) (cmax - cmin)) / ((float) cmax);
        else
            saturation = 0;
        if (saturation == 0)
            hue = 0;
        else {
            float redc = ((float) (cmax - r)) / ((float) (cmax - cmin));
            float greenc = ((float) (cmax - g)) / ((float) (cmax - cmin));
            float bluec = ((float) (cmax - b)) / ((float) (cmax - cmin));
            if (r == cmax)
                hue = bluec - greenc;
            else if (g == cmax)
                hue = 2.0f + redc - bluec;
            else
                hue = 4.0f + greenc - redc;
            hue = hue / 6.0f;
            if (hue < 0)
                hue = hue + 1.0f;
        }
        hsbvals[0] = hue;
        hsbvals[1] = saturation;
        hsbvals[2] = brightness;
        return hsbvals;
    }

    
Creates a Color object based on the specified values
for the HSB color model.


The s and b components should be
floating-point values between zero and one
(numbers in the range 0.0-1.0).  The h component
can be any floating-point number.  The floor of this number is
subtracted from it to create a fraction between 0 and 1.  This
fractional number is then multiplied by 360 to produce the hue
angle in the HSB color model.

Params:
  • h –   the hue component
  • s –   the saturation of the color
  • b –   the brightness of the color
Returns: a Color object with the specified hue,
                                saturation, and brightness.
Since:  JDK1.0
/**
     * Creates a <code>Color</code> object based on the specified values
     * for the HSB color model.
     * <p>
     * The <code>s</code> and <code>b</code> components should be
     * floating-point values between zero and one
     * (numbers in the range 0.0-1.0).  The <code>h</code> component
     * can be any floating-point number.  The floor of this number is
     * subtracted from it to create a fraction between 0 and 1.  This
     * fractional number is then multiplied by 360 to produce the hue
     * angle in the HSB color model.
     * @param  h   the hue component
     * @param  s   the saturation of the color
     * @param  b   the brightness of the color
     * @return  a <code>Color</code> object with the specified hue,
     *                                 saturation, and brightness.
     * @since   JDK1.0
     */
    public static Color getHSBColor(float h, float s, float b) {
        return new Color(HSBtoRGB(h, s, b));
    }

    
Returns a float array containing the color and alpha
components of the Color, as represented in the default
sRGB color space.
If compArray is null, an array of length
4 is created for the return value.  Otherwise,
compArray must have length 4 or greater,
and it is filled in with the components and returned.

Params:
  • compArray – an array that this method fills with
                 color and alpha components and returns
Returns:the RGBA components in a float array.
/**
     * Returns a <code>float</code> array containing the color and alpha
     * components of the <code>Color</code>, as represented in the default
     * sRGB color space.
     * If <code>compArray</code> is <code>null</code>, an array of length
     * 4 is created for the return value.  Otherwise,
     * <code>compArray</code> must have length 4 or greater,
     * and it is filled in with the components and returned.
     * @param compArray an array that this method fills with
     *                  color and alpha components and returns
     * @return the RGBA components in a <code>float</code> array.
     */
    public float[] getRGBComponents(float[] compArray) {
        float[] f;
        if (compArray == null) {
            f = new float[4];
        } else {
            f = compArray;
        }
        if (frgbvalue == null) {
            f[0] = ((float)getRed())/255f;
            f[1] = ((float)getGreen())/255f;
            f[2] = ((float)getBlue())/255f;
            f[3] = ((float)getAlpha())/255f;
        } else {
            f[0] = frgbvalue[0];
            f[1] = frgbvalue[1];
            f[2] = frgbvalue[2];
            f[3] = falpha;
        }
        return f;
    }

    
Returns a float array containing only the color
components of the Color, in the default sRGB color
space.  If compArray is null, an array of
length 3 is created for the return value.  Otherwise,
compArray must have length 3 or greater, and it is
filled in with the components and returned.

Params:
  • compArray – an array that this method fills with color
         components and returns
Returns:the RGB components in a float array.
/**
     * Returns a <code>float</code> array containing only the color
     * components of the <code>Color</code>, in the default sRGB color
     * space.  If <code>compArray</code> is <code>null</code>, an array of
     * length 3 is created for the return value.  Otherwise,
     * <code>compArray</code> must have length 3 or greater, and it is
     * filled in with the components and returned.
     * @param compArray an array that this method fills with color
     *          components and returns
     * @return the RGB components in a <code>float</code> array.
     */
    public float[] getRGBColorComponents(float[] compArray) {
        float[] f;
        if (compArray == null) {
            f = new float[3];
        } else {
            f = compArray;
        }
        if (frgbvalue == null) {
            f[0] = ((float)getRed())/255f;
            f[1] = ((float)getGreen())/255f;
            f[2] = ((float)getBlue())/255f;
        } else {
            f[0] = frgbvalue[0];
            f[1] = frgbvalue[1];
            f[2] = frgbvalue[2];
        }
        return f;
    }

    
Returns a float array containing the color and alpha
components of the Color, in the
ColorSpace of the Color.
If compArray is null, an array with
length equal to the number of components in the associated
ColorSpace plus one is created for
the return value.  Otherwise, compArray must have at
least this length and it is filled in with the components and
returned.

Params:
  • compArray – an array that this method fills with the color and
         alpha components of this Color in its
         ColorSpace and returns
Returns:the color and alpha components in a float
         array.
/**
     * Returns a <code>float</code> array containing the color and alpha
     * components of the <code>Color</code>, in the
     * <code>ColorSpace</code> of the <code>Color</code>.
     * If <code>compArray</code> is <code>null</code>, an array with
     * length equal to the number of components in the associated
     * <code>ColorSpace</code> plus one is created for
     * the return value.  Otherwise, <code>compArray</code> must have at
     * least this length and it is filled in with the components and
     * returned.
     * @param compArray an array that this method fills with the color and
     *          alpha components of this <code>Color</code> in its
     *          <code>ColorSpace</code> and returns
     * @return the color and alpha components in a <code>float</code>
     *          array.
     */
    public float[] getComponents(float[] compArray) {
        if (fvalue == null)
            return getRGBComponents(compArray);
        float[] f;
        int n = fvalue.length;
        if (compArray == null) {
            f = new float[n + 1];
        } else {
            f = compArray;
        }
        for (int i = 0; i < n; i++) {
            f[i] = fvalue[i];
        }
        f[n] = falpha;
        return f;
    }

    
Returns a float array containing only the color
components of the Color, in the
ColorSpace of the Color.
If compArray is null, an array with
length equal to the number of components in the associated
ColorSpace is created for
the return value.  Otherwise, compArray must have at
least this length and it is filled in with the components and
returned.

Params:
  • compArray – an array that this method fills with the color
         components of this Color in its
         ColorSpace and returns
Returns:the color components in a float array.
/**
     * Returns a <code>float</code> array containing only the color
     * components of the <code>Color</code>, in the
     * <code>ColorSpace</code> of the <code>Color</code>.
     * If <code>compArray</code> is <code>null</code>, an array with
     * length equal to the number of components in the associated
     * <code>ColorSpace</code> is created for
     * the return value.  Otherwise, <code>compArray</code> must have at
     * least this length and it is filled in with the components and
     * returned.
     * @param compArray an array that this method fills with the color
     *          components of this <code>Color</code> in its
     *          <code>ColorSpace</code> and returns
     * @return the color components in a <code>float</code> array.
     */
    public float[] getColorComponents(float[] compArray) {
        if (fvalue == null)
            return getRGBColorComponents(compArray);
        float[] f;
        int n = fvalue.length;
        if (compArray == null) {
            f = new float[n];
        } else {
            f = compArray;
        }
        for (int i = 0; i < n; i++) {
            f[i] = fvalue[i];
        }
        return f;
    }

    
Returns a float array containing the color and alpha
components of the Color, in the
ColorSpace specified by the cspace
parameter.  If compArray is null, an
array with length equal to the number of components in
cspace plus one is created for the return value.
Otherwise, compArray must have at least this
length, and it is filled in with the components and returned.

Params:
  • cspace – a specified ColorSpace
  • compArray – an array that this method fills with the
         color and alpha components of this Color in
         the specified ColorSpace and returns
Returns:the color and alpha components in a float
         array.
/**
     * Returns a <code>float</code> array containing the color and alpha
     * components of the <code>Color</code>, in the
     * <code>ColorSpace</code> specified by the <code>cspace</code>
     * parameter.  If <code>compArray</code> is <code>null</code>, an
     * array with length equal to the number of components in
     * <code>cspace</code> plus one is created for the return value.
     * Otherwise, <code>compArray</code> must have at least this
     * length, and it is filled in with the components and returned.
     * @param cspace a specified <code>ColorSpace</code>
     * @param compArray an array that this method fills with the
     *          color and alpha components of this <code>Color</code> in
     *          the specified <code>ColorSpace</code> and returns
     * @return the color and alpha components in a <code>float</code>
     *          array.
     */
    public float[] getComponents(ColorSpace cspace, float[] compArray) {
        if (cs == null) {
            cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        }
        float f[];
        if (fvalue == null) {
            f = new float[3];
            f[0] = ((float)getRed())/255f;
            f[1] = ((float)getGreen())/255f;
            f[2] = ((float)getBlue())/255f;
        } else {
            f = fvalue;
        }
        float tmp[] = cs.toCIEXYZ(f);
        float tmpout[] = cspace.fromCIEXYZ(tmp);
        if (compArray == null) {
            compArray = new float[tmpout.length + 1];
        }
        for (int i = 0 ; i < tmpout.length ; i++) {
            compArray[i] = tmpout[i];
        }
        if (fvalue == null) {
            compArray[tmpout.length] = ((float)getAlpha())/255f;
        } else {
            compArray[tmpout.length] = falpha;
        }
        return compArray;
    }

    
Returns a float array containing only the color
components of the Color in the
ColorSpace specified by the cspace
parameter. If compArray is null, an array
with length equal to the number of components in
cspace is created for the return value.  Otherwise,
compArray must have at least this length, and it is
filled in with the components and returned.

Params:
  • cspace – a specified ColorSpace
  • compArray – an array that this method fills with the color
         components of this Color in the specified
         ColorSpace
Returns:the color components in a float array.
/**
     * Returns a <code>float</code> array containing only the color
     * components of the <code>Color</code> in the
     * <code>ColorSpace</code> specified by the <code>cspace</code>
     * parameter. If <code>compArray</code> is <code>null</code>, an array
     * with length equal to the number of components in
     * <code>cspace</code> is created for the return value.  Otherwise,
     * <code>compArray</code> must have at least this length, and it is
     * filled in with the components and returned.
     * @param cspace a specified <code>ColorSpace</code>
     * @param compArray an array that this method fills with the color
     *          components of this <code>Color</code> in the specified
     *          <code>ColorSpace</code>
     * @return the color components in a <code>float</code> array.
     */
    public float[] getColorComponents(ColorSpace cspace, float[] compArray) {
        if (cs == null) {
            cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        }
        float f[];
        if (fvalue == null) {
            f = new float[3];
            f[0] = ((float)getRed())/255f;
            f[1] = ((float)getGreen())/255f;
            f[2] = ((float)getBlue())/255f;
        } else {
            f = fvalue;
        }
        float tmp[] = cs.toCIEXYZ(f);
        float tmpout[] = cspace.fromCIEXYZ(tmp);
        if (compArray == null) {
            return tmpout;
        }
        for (int i = 0 ; i < tmpout.length ; i++) {
            compArray[i] = tmpout[i];
        }
        return compArray;
    }

    
Returns the ColorSpace of this Color.

Returns:this Color object's ColorSpace.
/**
     * Returns the <code>ColorSpace</code> of this <code>Color</code>.
     * @return this <code>Color</code> object's <code>ColorSpace</code>.
     */
    public ColorSpace getColorSpace() {
        if (cs == null) {
            cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        }
        return cs;
    }

    
Creates and returns a PaintContext used to generate a solid color field pattern. See the specification of the method in the Paint interface for information on null parameter handling. 
Params:
  • cm – the preferred ColorModel which represents the most convenient format for the caller to receive the pixel data, or null if there is no preference.
  • r – the device space bounding box
                    of the graphics primitive being rendered.
  • r2d – the user space bounding box
                  of the graphics primitive being rendered.
  • xform – the AffineTransform from user space into device space.
  • hints – the set of hints that the context object can use to
             choose between rendering alternatives.
See Also:
Returns:the PaintContext for generating color patterns.
/**
     * Creates and returns a {@link PaintContext} used to
     * generate a solid color field pattern.
     * See the {@link Paint#createContext specification} of the
     * method in the {@link Paint} interface for information
     * on null parameter handling.
     *
     * @param cm the preferred {@link ColorModel} which represents the most convenient
     *           format for the caller to receive the pixel data, or {@code null}
     *           if there is no preference.
     * @param r the device space bounding box
     *                     of the graphics primitive being rendered.
     * @param r2d the user space bounding box
     *                   of the graphics primitive being rendered.
     * @param xform the {@link AffineTransform} from user
     *              space into device space.
     * @param hints the set of hints that the context object can use to
     *              choose between rendering alternatives.
     * @return the {@code PaintContext} for
     *         generating color patterns.
     * @see Paint
     * @see PaintContext
     * @see ColorModel
     * @see Rectangle
     * @see Rectangle2D
     * @see AffineTransform
     * @see RenderingHints
     */
    public synchronized PaintContext createContext(ColorModel cm, Rectangle r,
                                                   Rectangle2D r2d,
                                                   AffineTransform xform,
                                                   RenderingHints hints) {
        return new ColorPaintContext(getRGB(), cm);
    }

    
Returns the transparency mode for this Color.  This is
required to implement the Paint interface.

See Also:
Returns:this Color object's transparency mode.
/**
     * Returns the transparency mode for this <code>Color</code>.  This is
     * required to implement the <code>Paint</code> interface.
     * @return this <code>Color</code> object's transparency mode.
     * @see Paint
     * @see Transparency
     * @see #createContext
     */
    public int getTransparency() {
        int alpha = getAlpha();
        if (alpha == 0xff) {
            return Transparency.OPAQUE;
        }
        else if (alpha == 0) {
            return Transparency.BITMASK;
        }
        else {
            return Transparency.TRANSLUCENT;
        }
    }

}