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package java.awt;
import java.awt.geom.Dimension2D;
import java.beans.Transient;
The Dimension
class encapsulates the width and
height of a component (in integer precision) in a single object.
The class is
associated with certain properties of components. Several methods
defined by the Component
class and the
LayoutManager
interface return a
Dimension
object.
Normally the values of width
and height
are non-negative integers.
The constructors that allow you to create a dimension do
not prevent you from setting a negative value for these properties.
If the value of width
or height
is
negative, the behavior of some methods defined by other objects is
undefined.
Author: Sami Shaio, Arthur van Hoff See Also: Since: 1.0
/**
* The <code>Dimension</code> class encapsulates the width and
* height of a component (in integer precision) in a single object.
* The class is
* associated with certain properties of components. Several methods
* defined by the <code>Component</code> class and the
* <code>LayoutManager</code> interface return a
* <code>Dimension</code> object.
* <p>
* Normally the values of <code>width</code>
* and <code>height</code> are non-negative integers.
* The constructors that allow you to create a dimension do
* not prevent you from setting a negative value for these properties.
* If the value of <code>width</code> or <code>height</code> is
* negative, the behavior of some methods defined by other objects is
* undefined.
*
* @author Sami Shaio
* @author Arthur van Hoff
* @see java.awt.Component
* @see java.awt.LayoutManager
* @since 1.0
*/
public class Dimension extends Dimension2D implements java.io.Serializable {
The width dimension; negative values can be used.
See Also: @serial Since: 1.0
/**
* The width dimension; negative values can be used.
*
* @serial
* @see #getSize
* @see #setSize
* @since 1.0
*/
public int width;
The height dimension; negative values can be used.
See Also: @serial Since: 1.0
/**
* The height dimension; negative values can be used.
*
* @serial
* @see #getSize
* @see #setSize
* @since 1.0
*/
public int height;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 4723952579491349524L;
Initialize JNI field and method IDs
/**
* Initialize JNI field and method IDs
*/
private static native void initIDs();
static {
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
if (!GraphicsEnvironment.isHeadless()) {
initIDs();
}
}
Creates an instance of Dimension
with a width
of zero and a height of zero.
/**
* Creates an instance of <code>Dimension</code> with a width
* of zero and a height of zero.
*/
public Dimension() {
this(0, 0);
}
Creates an instance of Dimension
whose width
and height are the same as for the specified dimension.
Params: - d – the specified dimension for the
width
and
height
values
/**
* Creates an instance of <code>Dimension</code> whose width
* and height are the same as for the specified dimension.
*
* @param d the specified dimension for the
* <code>width</code> and
* <code>height</code> values
*/
public Dimension(Dimension d) {
this(d.width, d.height);
}
Constructs a Dimension
and initializes
it to the specified width and specified height.
Params: - width – the specified width
- height – the specified height
/**
* Constructs a <code>Dimension</code> and initializes
* it to the specified width and specified height.
*
* @param width the specified width
* @param height the specified height
*/
public Dimension(int width, int height) {
this.width = width;
this.height = height;
}
{@inheritDoc}
Since: 1.2
/**
* {@inheritDoc}
* @since 1.2
*/
public double getWidth() {
return width;
}
{@inheritDoc}
Since: 1.2
/**
* {@inheritDoc}
* @since 1.2
*/
public double getHeight() {
return height;
}
Sets the size of this Dimension
object to
the specified width and height in double precision.
Note that if width
or height
are larger than Integer.MAX_VALUE
, they will
be reset to Integer.MAX_VALUE
.
Params: - width – the new width for the
Dimension
object - height – the new height for the
Dimension
object
Since: 1.2
/**
* Sets the size of this <code>Dimension</code> object to
* the specified width and height in double precision.
* Note that if <code>width</code> or <code>height</code>
* are larger than <code>Integer.MAX_VALUE</code>, they will
* be reset to <code>Integer.MAX_VALUE</code>.
*
* @param width the new width for the <code>Dimension</code> object
* @param height the new height for the <code>Dimension</code> object
* @since 1.2
*/
public void setSize(double width, double height) {
this.width = (int) Math.ceil(width);
this.height = (int) Math.ceil(height);
}
Gets the size of this Dimension
object.
This method is included for completeness, to parallel the
getSize
method defined by Component
.
See Also: Returns: the size of this dimension, a new instance of
Dimension
with the same width and height Since: 1.1
/**
* Gets the size of this <code>Dimension</code> object.
* This method is included for completeness, to parallel the
* <code>getSize</code> method defined by <code>Component</code>.
*
* @return the size of this dimension, a new instance of
* <code>Dimension</code> with the same width and height
* @see java.awt.Dimension#setSize
* @see java.awt.Component#getSize
* @since 1.1
*/
@Transient
public Dimension getSize() {
return new Dimension(width, height);
}
Sets the size of this Dimension
object to the specified size.
This method is included for completeness, to parallel the
setSize
method defined by Component
.
Params: - d – the new size for this
Dimension
object
See Also: Since: 1.1
/**
* Sets the size of this <code>Dimension</code> object to the specified size.
* This method is included for completeness, to parallel the
* <code>setSize</code> method defined by <code>Component</code>.
* @param d the new size for this <code>Dimension</code> object
* @see java.awt.Dimension#getSize
* @see java.awt.Component#setSize
* @since 1.1
*/
public void setSize(Dimension d) {
setSize(d.width, d.height);
}
Sets the size of this Dimension
object
to the specified width and height.
This method is included for completeness, to parallel the
setSize
method defined by Component
.
Params: - width – the new width for this
Dimension
object - height – the new height for this
Dimension
object
See Also: Since: 1.1
/**
* Sets the size of this <code>Dimension</code> object
* to the specified width and height.
* This method is included for completeness, to parallel the
* <code>setSize</code> method defined by <code>Component</code>.
*
* @param width the new width for this <code>Dimension</code> object
* @param height the new height for this <code>Dimension</code> object
* @see java.awt.Dimension#getSize
* @see java.awt.Component#setSize
* @since 1.1
*/
public void setSize(int width, int height) {
this.width = width;
this.height = height;
}
Checks whether two dimension objects have equal values.
/**
* Checks whether two dimension objects have equal values.
*/
public boolean equals(Object obj) {
if (obj instanceof Dimension) {
Dimension d = (Dimension)obj;
return (width == d.width) && (height == d.height);
}
return false;
}
Returns the hash code for this Dimension
.
Returns: a hash code for this Dimension
/**
* Returns the hash code for this <code>Dimension</code>.
*
* @return a hash code for this <code>Dimension</code>
*/
public int hashCode() {
int sum = width + height;
return sum * (sum + 1)/2 + width;
}
Returns a string representation of the values of this
Dimension
object's height
and
width
fields. This method is intended to be used only
for debugging purposes, and the content and format of the returned
string may vary between implementations. The returned string may be
empty but may not be null
.
Returns: a string representation of this Dimension
object
/**
* Returns a string representation of the values of this
* <code>Dimension</code> object's <code>height</code> and
* <code>width</code> fields. This method is intended to be used only
* for debugging purposes, and the content and format of the returned
* string may vary between implementations. The returned string may be
* empty but may not be <code>null</code>.
*
* @return a string representation of this <code>Dimension</code>
* object
*/
public String toString() {
return getClass().getName() + "[width=" + width + ",height=" + height + "]";
}
}