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package java.awt;


An Insets object is a representation of the borders of a container. It specifies the space that a container must leave at each of its edges. The space can be a border, a blank space, or a title. 
Author:     Arthur van Hoff,      Sami Shaio
See Also:
Since:      1.0
/**
 * An {@code Insets} object is a representation of the borders
 * of a container. It specifies the space that a container must leave
 * at each of its edges. The space can be a border, a blank space, or
 * a title.
 *
 * @author      Arthur van Hoff
 * @author      Sami Shaio
 * @see         java.awt.LayoutManager
 * @see         java.awt.Container
 * @since       1.0
 */
public class Insets implements Cloneable, java.io.Serializable {

    
The inset from the top.
This value is added to the Top of the rectangle
to yield a new location for the Top.

See Also:
@serial
/**
     * The inset from the top.
     * This value is added to the Top of the rectangle
     * to yield a new location for the Top.
     *
     * @serial
     * @see #clone()
     */
    public int top;

    
The inset from the left.
This value is added to the Left of the rectangle
to yield a new location for the Left edge.

See Also:
@serial
/**
     * The inset from the left.
     * This value is added to the Left of the rectangle
     * to yield a new location for the Left edge.
     *
     * @serial
     * @see #clone()
     */
    public int left;

    
The inset from the bottom.
This value is subtracted from the Bottom of the rectangle
to yield a new location for the Bottom.

See Also:
@serial
/**
     * The inset from the bottom.
     * This value is subtracted from the Bottom of the rectangle
     * to yield a new location for the Bottom.
     *
     * @serial
     * @see #clone()
     */
    public int bottom;

    
The inset from the right.
This value is subtracted from the Right of the rectangle
to yield a new location for the Right edge.

See Also:
@serial
/**
     * The inset from the right.
     * This value is subtracted from the Right of the rectangle
     * to yield a new location for the Right edge.
     *
     * @serial
     * @see #clone()
     */
    public int right;

    /*
     * JDK 1.1 serialVersionUID
     */
    private static final long serialVersionUID = -2272572637695466749L;

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

    
Creates and initializes a new Insets object with the specified top, left, bottom, and right insets. 
Params:
  • top –   the inset from the top.
  • left –   the inset from the left.
  • bottom –   the inset from the bottom.
  • right –   the inset from the right.
/**
     * Creates and initializes a new {@code Insets} object with the
     * specified top, left, bottom, and right insets.
     * @param       top   the inset from the top.
     * @param       left   the inset from the left.
     * @param       bottom   the inset from the bottom.
     * @param       right   the inset from the right.
     */
    public Insets(int top, int left, int bottom, int right) {
        this.top = top;
        this.left = left;
        this.bottom = bottom;
        this.right = right;
    }

    
Set top, left, bottom, and right to the specified values

Params:
  • top –   the inset from the top.
  • left –   the inset from the left.
  • bottom –   the inset from the bottom.
  • right –   the inset from the right.
Since:1.5
/**
     * Set top, left, bottom, and right to the specified values
     *
     * @param       top   the inset from the top.
     * @param       left   the inset from the left.
     * @param       bottom   the inset from the bottom.
     * @param       right   the inset from the right.
     * @since 1.5
     */
    public void set(int top, int left, int bottom, int right) {
        this.top = top;
        this.left = left;
        this.bottom = bottom;
        this.right = right;
    }

    
Checks whether two insets objects are equal. Two instances of Insets are equal if the four integer values of the fields top, left, bottom, and right are all equal. 
Returns: true if the two insets are equal; otherwise false.
Since:      1.1
/**
     * Checks whether two insets objects are equal. Two instances
     * of {@code Insets} are equal if the four integer values
     * of the fields {@code top}, {@code left},
     * {@code bottom}, and {@code right} are all equal.
     * @return      {@code true} if the two insets are equal;
     *                          otherwise {@code false}.
     * @since       1.1
     */
    public boolean equals(Object obj) {
        if (obj instanceof Insets) {
            Insets insets = (Insets)obj;
            return ((top == insets.top) && (left == insets.left) &&
                    (bottom == insets.bottom) && (right == insets.right));
        }
        return false;
    }

    
Returns the hash code for this Insets.

Returns:   a hash code for this Insets.
/**
     * Returns the hash code for this Insets.
     *
     * @return    a hash code for this Insets.
     */
    public int hashCode() {
        int sum1 = left + bottom;
        int sum2 = right + top;
        int val1 = sum1 * (sum1 + 1)/2 + left;
        int val2 = sum2 * (sum2 + 1)/2 + top;
        int sum3 = val1 + val2;
        return sum3 * (sum3 + 1)/2 + val2;
    }

    
Returns a string representation of this Insets object. 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 Insets object.
/**
     * Returns a string representation of this {@code Insets} object.
     * 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}.
     *
     * @return  a string representation of this {@code Insets} object.
     */
    public String toString() {
        return getClass().getName() + "[top="  + top + ",left=" + left + ",bottom=" + bottom + ",right=" + right + "]";
    }

    
Create a copy of this object.

Returns: a copy of this Insets object.
/**
     * Create a copy of this object.
     * @return     a copy of this {@code Insets} object.
     */
    public Object clone() {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            // this shouldn't happen, since we are Cloneable
            throw new InternalError(e);
        }
    }
    
Initialize JNI field and method IDs

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

}