https://openjdk.java.net/ 
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * 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.awt.geom.Rectangle2D;
import java.beans.Transient;


A Rectangle specifies an area in a coordinate space that is enclosed by the Rectangle object's upper-left point (x,y) in the coordinate space, its width, and its height. 
 A Rectangle object's width and height are public fields. The constructors that create a Rectangle, and the methods that can modify one, do not prevent setting a negative value for width or height. 

 A Rectangle whose width or height is exactly zero has location along those axes with zero dimension, but is otherwise considered empty. The isEmpty method will return true for such a Rectangle. Methods which test if an empty Rectangle contains or intersects a point or rectangle will always return false if either dimension is zero. Methods which combine such a Rectangle with a point or rectangle will include the location of the Rectangle on that axis in the result as if the add(Point) method were being called. 

 A Rectangle whose width or height is negative has neither location nor dimension along those axes with negative dimensions. Such a Rectangle is treated as non-existent along those axes. Such a Rectangle is also empty with respect to containment calculations and methods which test if it contains or intersects a point or rectangle will always return false. Methods which combine such a Rectangle with a point or rectangle will ignore the Rectangle entirely in generating the result. If two Rectangle objects are combined and each has a negative dimension, the result will have at least one negative dimension. 

 Methods which affect only the location of a Rectangle will operate on its location regardless of whether or not it has a negative or zero dimension along either axis. 
 Note that a Rectangle constructed with the default no-argument constructor will have dimensions of 0x0 and therefore be empty. That Rectangle will still have a location of (0,0) and will contribute that location to the union and add operations. Code attempting to accumulate the bounds of a set of points should therefore initially construct the Rectangle with a specifically negative width and height or it should use the first point in the set to construct the Rectangle. For example: 

    Rectangle bounds = new Rectangle(0, 0, -1, -1);
    for (int i = 0; i < points.length; i++) {
        bounds.add(points[i]);
    }


or if we know that the points array contains at least one point:


    Rectangle bounds = new Rectangle(points[0]);
    for (int i = 1; i < points.length; i++) {
        bounds.add(points[i]);
    }



 This class uses 32-bit integers to store its location and dimensions. Frequently operations may produce a result that exceeds the range of a 32-bit integer. The methods will calculate their results in a way that avoids any 32-bit overflow for intermediate results and then choose the best representation to store the final results back into the 32-bit fields which hold the location and dimensions. The location of the result will be stored into the x and y fields by clipping the true result to the nearest 32-bit value. The values stored into the width and height dimension fields will be chosen as the 32-bit values that encompass the largest part of the true result as possible. Generally this means that the dimension will be clipped independently to the range of 32-bit integers except that if the location had to be moved to store it into its pair of 32-bit fields then the dimensions will be adjusted relative to the "best representation" of the location. If the true result had a negative dimension and was therefore non-existent along one or both axes, the stored dimensions will be negative numbers in those axes. If the true result had a location that could be represented within the range of 32-bit integers, but zero dimension along one or both axes, then the stored dimensions will be zero in those axes. 
Author:     Sami Shaio
Since:1.0
/**
 * A {@code Rectangle} specifies an area in a coordinate space that is
 * enclosed by the {@code Rectangle} object's upper-left point
 * {@code (x,y)}
 * in the coordinate space, its width, and its height.
 * <p>
 * A {@code Rectangle} object's {@code width} and
 * {@code height} are {@code public} fields. The constructors
 * that create a {@code Rectangle}, and the methods that can modify
 * one, do not prevent setting a negative value for width or height.
 * <p>
 * <a id="Empty">
 * A {@code Rectangle} whose width or height is exactly zero has location
 * along those axes with zero dimension, but is otherwise considered empty.</a>
 * The {@link #isEmpty} method will return true for such a {@code Rectangle}.
 * Methods which test if an empty {@code Rectangle} contains or intersects
 * a point or rectangle will always return false if either dimension is zero.
 * Methods which combine such a {@code Rectangle} with a point or rectangle
 * will include the location of the {@code Rectangle} on that axis in the
 * result as if the {@link #add(Point)} method were being called.
 * <p>
 * <a id="NonExistent">
 * A {@code Rectangle} whose width or height is negative has neither
 * location nor dimension along those axes with negative dimensions.
 * Such a {@code Rectangle} is treated as non-existent along those axes.
 * Such a {@code Rectangle} is also empty with respect to containment
 * calculations and methods which test if it contains or intersects a
 * point or rectangle will always return false.
 * Methods which combine such a {@code Rectangle} with a point or rectangle
 * will ignore the {@code Rectangle} entirely in generating the result.
 * If two {@code Rectangle} objects are combined and each has a negative
 * dimension, the result will have at least one negative dimension.
 * </a>
 * <p>
 * Methods which affect only the location of a {@code Rectangle} will
 * operate on its location regardless of whether or not it has a negative
 * or zero dimension along either axis.
 * <p>
 * Note that a {@code Rectangle} constructed with the default no-argument
 * constructor will have dimensions of {@code 0x0} and therefore be empty.
 * That {@code Rectangle} will still have a location of {@code (0,0)} and
 * will contribute that location to the union and add operations.
 * Code attempting to accumulate the bounds of a set of points should
 * therefore initially construct the {@code Rectangle} with a specifically
 * negative width and height or it should use the first point in the set
 * to construct the {@code Rectangle}.
 * For example:
 * <pre>{@code
 *     Rectangle bounds = new Rectangle(0, 0, -1, -1);
 *     for (int i = 0; i < points.length; i++) {
 *         bounds.add(points[i]);
 *     }
 * }</pre>
 * or if we know that the points array contains at least one point:
 * <pre>{@code
 *     Rectangle bounds = new Rectangle(points[0]);
 *     for (int i = 1; i < points.length; i++) {
 *         bounds.add(points[i]);
 *     }
 * }</pre>
 * <p>
 * This class uses 32-bit integers to store its location and dimensions.
 * Frequently operations may produce a result that exceeds the range of
 * a 32-bit integer.
 * The methods will calculate their results in a way that avoids any
 * 32-bit overflow for intermediate results and then choose the best
 * representation to store the final results back into the 32-bit fields
 * which hold the location and dimensions.
 * The location of the result will be stored into the {@link #x} and
 * {@link #y} fields by clipping the true result to the nearest 32-bit value.
 * The values stored into the {@link #width} and {@link #height} dimension
 * fields will be chosen as the 32-bit values that encompass the largest
 * part of the true result as possible.
 * Generally this means that the dimension will be clipped independently
 * to the range of 32-bit integers except that if the location had to be
 * moved to store it into its pair of 32-bit fields then the dimensions
 * will be adjusted relative to the "best representation" of the location.
 * If the true result had a negative dimension and was therefore
 * non-existent along one or both axes, the stored dimensions will be
 * negative numbers in those axes.
 * If the true result had a location that could be represented within
 * the range of 32-bit integers, but zero dimension along one or both
 * axes, then the stored dimensions will be zero in those axes.
 *
 * @author      Sami Shaio
 * @since 1.0
 */
public class Rectangle extends Rectangle2D
    implements Shape, java.io.Serializable
{

    
The X coordinate of the upper-left corner of the Rectangle. 
See Also:
@serial
Since:1.0
/**
     * The X coordinate of the upper-left corner of the {@code Rectangle}.
     *
     * @serial
     * @see #setLocation(int, int)
     * @see #getLocation()
     * @since 1.0
     */
    public int x;

    
The Y coordinate of the upper-left corner of the Rectangle. 
See Also:
@serial
Since:1.0
/**
     * The Y coordinate of the upper-left corner of the {@code Rectangle}.
     *
     * @serial
     * @see #setLocation(int, int)
     * @see #getLocation()
     * @since 1.0
     */
    public int y;

    
The width of the Rectangle. 
See Also:
@serial
Since:1.0
/**
     * The width of the {@code Rectangle}.
     * @serial
     * @see #setSize(int, int)
     * @see #getSize()
     * @since 1.0
     */
    public int width;

    
The height of the Rectangle. 
See Also:
@serial
Since:1.0
/**
     * The height of the {@code Rectangle}.
     *
     * @serial
     * @see #setSize(int, int)
     * @see #getSize()
     * @since 1.0
     */
    public int height;

    /*
     * JDK 1.1 serialVersionUID
     */
     private static final long serialVersionUID = -4345857070255674764L;

    
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();
        }
    }

    
Constructs a new Rectangle whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are both zero. 
/**
     * Constructs a new {@code Rectangle} whose upper-left corner
     * is at (0,&nbsp;0) in the coordinate space, and whose width and
     * height are both zero.
     */
    public Rectangle() {
        this(0, 0, 0, 0);
    }

    
Constructs a new Rectangle, initialized to match the values of the specified Rectangle. 
Params:
  • r –  the Rectangle from which to copy initial values to a newly constructed Rectangle
Since:1.1
/**
     * Constructs a new {@code Rectangle}, initialized to match
     * the values of the specified {@code Rectangle}.
     * @param r  the {@code Rectangle} from which to copy initial values
     *           to a newly constructed {@code Rectangle}
     * @since 1.1
     */
    public Rectangle(Rectangle r) {
        this(r.x, r.y, r.width, r.height);
    }

    
Constructs a new Rectangle whose upper-left corner is specified as (x,y) and whose width and height are specified by the arguments of the same name. 
Params:
  • x – the specified X coordinate
  • y – the specified Y coordinate
  • width –  the width of the Rectangle
  • height –  the height of the Rectangle
Since:1.0
/**
     * Constructs a new {@code Rectangle} whose upper-left corner is
     * specified as
     * {@code (x,y)} and whose width and height
     * are specified by the arguments of the same name.
     * @param     x the specified X coordinate
     * @param     y the specified Y coordinate
     * @param     width    the width of the {@code Rectangle}
     * @param     height   the height of the {@code Rectangle}
     * @since 1.0
     */
    public Rectangle(int x, int y, int width, int height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }

    
Constructs a new Rectangle whose upper-left corner is at (0, 0) in the coordinate space, and whose width and height are specified by the arguments of the same name. 
Params:
  • width – the width of the Rectangle
  • height – the height of the Rectangle
/**
     * Constructs a new {@code Rectangle} whose upper-left corner
     * is at (0,&nbsp;0) in the coordinate space, and whose width and
     * height are specified by the arguments of the same name.
     * @param width the width of the {@code Rectangle}
     * @param height the height of the {@code Rectangle}
     */
    public Rectangle(int width, int height) {
        this(0, 0, width, height);
    }

    
Constructs a new Rectangle whose upper-left corner is specified by the Point argument, and whose width and height are specified by the Dimension argument. 
Params:
  • p – a Point that is the upper-left corner of the Rectangle
  • d – a Dimension, representing the width and height of the Rectangle
/**
     * Constructs a new {@code Rectangle} whose upper-left corner is
     * specified by the {@link Point} argument, and
     * whose width and height are specified by the
     * {@link Dimension} argument.
     * @param p a {@code Point} that is the upper-left corner of
     * the {@code Rectangle}
     * @param d a {@code Dimension}, representing the
     * width and height of the {@code Rectangle}
     */
    public Rectangle(Point p, Dimension d) {
        this(p.x, p.y, d.width, d.height);
    }

    
Constructs a new Rectangle whose upper-left corner is the specified Point, and whose width and height are both zero. 
Params:
  • p – a Point that is the top left corner of the Rectangle
/**
     * Constructs a new {@code Rectangle} whose upper-left corner is the
     * specified {@code Point}, and whose width and height are both zero.
     * @param p a {@code Point} that is the top left corner
     * of the {@code Rectangle}
     */
    public Rectangle(Point p) {
        this(p.x, p.y, 0, 0);
    }

    
Constructs a new Rectangle whose top left corner is (0, 0) and whose width and height are specified by the Dimension argument. 
Params:
  • d – a Dimension, specifying width and height
/**
     * Constructs a new {@code Rectangle} whose top left corner is
     * (0,&nbsp;0) and whose width and height are specified
     * by the {@code Dimension} argument.
     * @param d a {@code Dimension}, specifying width and height
     */
    public Rectangle(Dimension d) {
        this(0, 0, d.width, d.height);
    }

    
Returns the X coordinate of the bounding Rectangle in double precision. 
Returns:the X coordinate of the bounding Rectangle.
/**
     * Returns the X coordinate of the bounding {@code Rectangle} in
     * {@code double} precision.
     * @return the X coordinate of the bounding {@code Rectangle}.
     */
    public double getX() {
        return x;
    }

    
Returns the Y coordinate of the bounding Rectangle in double precision. 
Returns:the Y coordinate of the bounding Rectangle.
/**
     * Returns the Y coordinate of the bounding {@code Rectangle} in
     * {@code double} precision.
     * @return the Y coordinate of the bounding {@code Rectangle}.
     */
    public double getY() {
        return y;
    }

    
Returns the width of the bounding Rectangle in double precision. 
Returns:the width of the bounding Rectangle.
/**
     * Returns the width of the bounding {@code Rectangle} in
     * {@code double} precision.
     * @return the width of the bounding {@code Rectangle}.
     */
    public double getWidth() {
        return width;
    }

    
Returns the height of the bounding Rectangle in double precision. 
Returns:the height of the bounding Rectangle.
/**
     * Returns the height of the bounding {@code Rectangle} in
     * {@code double} precision.
     * @return the height of the bounding {@code Rectangle}.
     */
    public double getHeight() {
        return height;
    }

    
Gets the bounding Rectangle of this Rectangle. 
 This method is included for completeness, to parallel the getBounds method of Component. 
See Also:
Returns: a new Rectangle, equal to the bounding Rectangle for this Rectangle.
Since:    1.1
/**
     * Gets the bounding {@code Rectangle} of this {@code Rectangle}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code getBounds} method of
     * {@link Component}.
     * @return    a new {@code Rectangle}, equal to the
     * bounding {@code Rectangle} for this {@code Rectangle}.
     * @see       java.awt.Component#getBounds
     * @see       #setBounds(Rectangle)
     * @see       #setBounds(int, int, int, int)
     * @since     1.1
     */
    @Transient
    public Rectangle getBounds() {
        return new Rectangle(x, y, width, height);
    }

    
{@inheritDoc}

Since:1.2
/**
     * {@inheritDoc}
     * @since 1.2
     */
    public Rectangle2D getBounds2D() {
        return new Rectangle(x, y, width, height);
    }

    
Sets the bounding Rectangle of this Rectangle to match the specified Rectangle. 
 This method is included for completeness, to parallel the setBounds method of Component. 
Params:
  • r – the specified Rectangle
See Also:
Since:    1.1
/**
     * Sets the bounding {@code Rectangle} of this {@code Rectangle}
     * to match the specified {@code Rectangle}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setBounds} method of {@code Component}.
     * @param r the specified {@code Rectangle}
     * @see       #getBounds
     * @see       java.awt.Component#setBounds(java.awt.Rectangle)
     * @since     1.1
     */
    public void setBounds(Rectangle r) {
        setBounds(r.x, r.y, r.width, r.height);
    }

    
Sets the bounding Rectangle of this Rectangle to the specified x, y, width, and height. 
 This method is included for completeness, to parallel the setBounds method of Component. 
Params:
  • x – the new X coordinate for the upper-left corner of this Rectangle
  • y – the new Y coordinate for the upper-left corner of this Rectangle
  • width – the new width for this Rectangle
  • height – the new height for this Rectangle
See Also:
Since:    1.1
/**
     * Sets the bounding {@code Rectangle} of this
     * {@code Rectangle} to the specified
     * {@code x}, {@code y}, {@code width},
     * and {@code height}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setBounds} method of {@code Component}.
     * @param x the new X coordinate for the upper-left
     *                    corner of this {@code Rectangle}
     * @param y the new Y coordinate for the upper-left
     *                    corner of this {@code Rectangle}
     * @param width the new width for this {@code Rectangle}
     * @param height the new height for this {@code Rectangle}
     * @see       #getBounds
     * @see       java.awt.Component#setBounds(int, int, int, int)
     * @since     1.1
     */
    public void setBounds(int x, int y, int width, int height) {
        reshape(x, y, width, height);
    }

    
Sets the bounds of this Rectangle to the integer bounds which encompass the specified x, y, width, and height. If the parameters specify a Rectangle that exceeds the maximum range of integers, the result will be the best representation of the specified Rectangle intersected with the maximum integer bounds. 
Params:
  • x – the X coordinate of the upper-left corner of
                 the specified rectangle
  • y – the Y coordinate of the upper-left corner of
                 the specified rectangle
  • width – the width of the specified rectangle
  • height – the new height of the specified rectangle
/**
     * Sets the bounds of this {@code Rectangle} to the integer bounds
     * which encompass the specified {@code x}, {@code y}, {@code width},
     * and {@code height}.
     * If the parameters specify a {@code Rectangle} that exceeds the
     * maximum range of integers, the result will be the best
     * representation of the specified {@code Rectangle} intersected
     * with the maximum integer bounds.
     * @param x the X coordinate of the upper-left corner of
     *                  the specified rectangle
     * @param y the Y coordinate of the upper-left corner of
     *                  the specified rectangle
     * @param width the width of the specified rectangle
     * @param height the new height of the specified rectangle
     */
    public void setRect(double x, double y, double width, double height) {
        int newx, newy, neww, newh;

        if (x > 2.0 * Integer.MAX_VALUE) {
            // Too far in positive X direction to represent...
            // We cannot even reach the left side of the specified
            // rectangle even with both x & width set to MAX_VALUE.
            // The intersection with the "maximal integer rectangle"
            // is non-existent so we should use a width < 0.
            // REMIND: Should we try to determine a more "meaningful"
            // adjusted value for neww than just "-1"?
            newx = Integer.MAX_VALUE;
            neww = -1;
        } else {
            newx = clip(x, false);
            if (width >= 0) width += x-newx;
            neww = clip(width, width >= 0);
        }

        if (y > 2.0 * Integer.MAX_VALUE) {
            // Too far in positive Y direction to represent...
            newy = Integer.MAX_VALUE;
            newh = -1;
        } else {
            newy = clip(y, false);
            if (height >= 0) height += y-newy;
            newh = clip(height, height >= 0);
        }

        reshape(newx, newy, neww, newh);
    }
    // Return best integer representation for v, clipped to integer
    // range and floor-ed or ceiling-ed, depending on the boolean.
    private static int clip(double v, boolean doceil) {
        if (v <= Integer.MIN_VALUE) {
            return Integer.MIN_VALUE;
        }
        if (v >= Integer.MAX_VALUE) {
            return Integer.MAX_VALUE;
        }
        return (int) (doceil ? Math.ceil(v) : Math.floor(v));
    }

    
Sets the bounding Rectangle of this Rectangle to the specified x, y, width, and height. 
Params:
  • x – the new X coordinate for the upper-left corner of this Rectangle
  • y – the new Y coordinate for the upper-left corner of this Rectangle
  • width – the new width for this Rectangle
  • height – the new height for this Rectangle
Deprecated:As of JDK version 1.1, replaced by setBounds(int, int, int, int).
/**
     * Sets the bounding {@code Rectangle} of this
     * {@code Rectangle} to the specified
     * {@code x}, {@code y}, {@code width},
     * and {@code height}.
     *
     * @param x the new X coordinate for the upper-left
     *                    corner of this {@code Rectangle}
     * @param y the new Y coordinate for the upper-left
     *                    corner of this {@code Rectangle}
     * @param width the new width for this {@code Rectangle}
     * @param height the new height for this {@code Rectangle}
     * @deprecated As of JDK version 1.1,
     * replaced by {@code setBounds(int, int, int, int)}.
     */
    @Deprecated
    public void reshape(int x, int y, int width, int height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }

    
Returns the location of this Rectangle. 
 This method is included for completeness, to parallel the getLocation method of Component. 
See Also:
Returns:the Point that is the upper-left corner of this Rectangle.
Since:    1.1
/**
     * Returns the location of this {@code Rectangle}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code getLocation} method of {@code Component}.
     * @return the {@code Point} that is the upper-left corner of
     *                  this {@code Rectangle}.
     * @see       java.awt.Component#getLocation
     * @see       #setLocation(Point)
     * @see       #setLocation(int, int)
     * @since     1.1
     */
    public Point getLocation() {
        return new Point(x, y);
    }

    
Moves this Rectangle to the specified location. 
 This method is included for completeness, to parallel the setLocation method of Component. 
Params:
  • p – the Point specifying the new location for this Rectangle
See Also:
Since:    1.1
/**
     * Moves this {@code Rectangle} to the specified location.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setLocation} method of {@code Component}.
     * @param p the {@code Point} specifying the new location
     *                for this {@code Rectangle}
     * @see       java.awt.Component#setLocation(java.awt.Point)
     * @see       #getLocation
     * @since     1.1
     */
    public void setLocation(Point p) {
        setLocation(p.x, p.y);
    }

    
Moves this Rectangle to the specified location. 
 This method is included for completeness, to parallel the setLocation method of Component. 
Params:
  • x – the X coordinate of the new location
  • y – the Y coordinate of the new location
See Also:
Since:    1.1
/**
     * Moves this {@code Rectangle} to the specified location.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setLocation} method of {@code Component}.
     * @param x the X coordinate of the new location
     * @param y the Y coordinate of the new location
     * @see       #getLocation
     * @see       java.awt.Component#setLocation(int, int)
     * @since     1.1
     */
    public void setLocation(int x, int y) {
        move(x, y);
    }

    
Moves this Rectangle to the specified location. 
Params:
  • x – the X coordinate of the new location
  • y – the Y coordinate of the new location
Deprecated:As of JDK version 1.1, replaced by setLocation(int, int).
/**
     * Moves this {@code Rectangle} to the specified location.
     *
     * @param x the X coordinate of the new location
     * @param y the Y coordinate of the new location
     * @deprecated As of JDK version 1.1,
     * replaced by {@code setLocation(int, int)}.
     */
    @Deprecated
    public void move(int x, int y) {
        this.x = x;
        this.y = y;
    }

    
Translates this Rectangle the indicated distance, to the right along the X coordinate axis, and downward along the Y coordinate axis. 
Params:
  • dx – the distance to move this Rectangle along the X axis
  • dy – the distance to move this Rectangle along the Y axis
See Also:
/**
     * Translates this {@code Rectangle} the indicated distance,
     * to the right along the X coordinate axis, and
     * downward along the Y coordinate axis.
     * @param dx the distance to move this {@code Rectangle}
     *                 along the X axis
     * @param dy the distance to move this {@code Rectangle}
     *                 along the Y axis
     * @see       java.awt.Rectangle#setLocation(int, int)
     * @see       java.awt.Rectangle#setLocation(java.awt.Point)
     */
    public void translate(int dx, int dy) {
        int oldv = this.x;
        int newv = oldv + dx;
        if (dx < 0) {
            // moving leftward
            if (newv > oldv) {
                // negative overflow
                // Only adjust width if it was valid (>= 0).
                if (width >= 0) {
                    // The right edge is now conceptually at
                    // newv+width, but we may move newv to prevent
                    // overflow.  But we want the right edge to
                    // remain at its new location in spite of the
                    // clipping.  Think of the following adjustment
                    // conceptually the same as:
                    // width += newv; newv = MIN_VALUE; width -= newv;
                    width += newv - Integer.MIN_VALUE;
                    // width may go negative if the right edge went past
                    // MIN_VALUE, but it cannot overflow since it cannot
                    // have moved more than MIN_VALUE and any non-negative
                    // number + MIN_VALUE does not overflow.
                }
                newv = Integer.MIN_VALUE;
            }
        } else {
            // moving rightward (or staying still)
            if (newv < oldv) {
                // positive overflow
                if (width >= 0) {
                    // Conceptually the same as:
                    // width += newv; newv = MAX_VALUE; width -= newv;
                    width += newv - Integer.MAX_VALUE;
                    // With large widths and large displacements
                    // we may overflow so we need to check it.
                    if (width < 0) width = Integer.MAX_VALUE;
                }
                newv = Integer.MAX_VALUE;
            }
        }
        this.x = newv;

        oldv = this.y;
        newv = oldv + dy;
        if (dy < 0) {
            // moving upward
            if (newv > oldv) {
                // negative overflow
                if (height >= 0) {
                    height += newv - Integer.MIN_VALUE;
                    // See above comment about no overflow in this case
                }
                newv = Integer.MIN_VALUE;
            }
        } else {
            // moving downward (or staying still)
            if (newv < oldv) {
                // positive overflow
                if (height >= 0) {
                    height += newv - Integer.MAX_VALUE;
                    if (height < 0) height = Integer.MAX_VALUE;
                }
                newv = Integer.MAX_VALUE;
            }
        }
        this.y = newv;
    }

    
Gets the size of this Rectangle, represented by the returned Dimension. 
 This method is included for completeness, to parallel the getSize method of Component. 
See Also:
Returns:a Dimension, representing the size of this Rectangle.
Since:    1.1
/**
     * Gets the size of this {@code Rectangle}, represented by
     * the returned {@code Dimension}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code getSize} method of {@code Component}.
     * @return a {@code Dimension}, representing the size of
     *            this {@code Rectangle}.
     * @see       java.awt.Component#getSize
     * @see       #setSize(Dimension)
     * @see       #setSize(int, int)
     * @since     1.1
     */
    public Dimension getSize() {
        return new Dimension(width, height);
    }

    
Sets the size of this Rectangle to match the specified Dimension. 
 This method is included for completeness, to parallel the setSize method of Component. 
Params:
  • d – the new size for the Dimension object
See Also:
Since:    1.1
/**
     * Sets the size of this {@code Rectangle} to match the
     * specified {@code Dimension}.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setSize} method of {@code Component}.
     * @param d the new size for the {@code Dimension} object
     * @see       java.awt.Component#setSize(java.awt.Dimension)
     * @see       #getSize
     * @since     1.1
     */
    public void setSize(Dimension d) {
        setSize(d.width, d.height);
    }

    
Sets the size of this Rectangle to the specified width and height. 
 This method is included for completeness, to parallel the setSize method of Component. 
Params:
  • width – the new width for this Rectangle
  • height – the new height for this Rectangle
See Also:
Since:    1.1
/**
     * Sets the size of this {@code Rectangle} to the specified
     * width and height.
     * <p>
     * This method is included for completeness, to parallel the
     * {@code setSize} method of {@code Component}.
     * @param width the new width for this {@code Rectangle}
     * @param height the new height for this {@code Rectangle}
     * @see       java.awt.Component#setSize(int, int)
     * @see       #getSize
     * @since     1.1
     */
    public void setSize(int width, int height) {
        resize(width, height);
    }

    
Sets the size of this Rectangle to the specified width and height. 
Params:
  • width – the new width for this Rectangle
  • height – the new height for this Rectangle
Deprecated:As of JDK version 1.1, replaced by setSize(int, int).
/**
     * Sets the size of this {@code Rectangle} to the specified
     * width and height.
     *
     * @param width the new width for this {@code Rectangle}
     * @param height the new height for this {@code Rectangle}
     * @deprecated As of JDK version 1.1,
     * replaced by {@code setSize(int, int)}.
     */
    @Deprecated
    public void resize(int width, int height) {
        this.width = width;
        this.height = height;
    }

    
Checks whether or not this Rectangle contains the specified Point. 
Params:
  • p – the Point to test
Returns: true if the specified Point is inside this Rectangle; false otherwise.
Since:    1.1
/**
     * Checks whether or not this {@code Rectangle} contains the
     * specified {@code Point}.
     * @param p the {@code Point} to test
     * @return    {@code true} if the specified {@code Point}
     *            is inside this {@code Rectangle};
     *            {@code false} otherwise.
     * @since     1.1
     */
    public boolean contains(Point p) {
        return contains(p.x, p.y);
    }

    
Checks whether or not this Rectangle contains the point at the specified location (x,y). 
Params:
  • x – the specified X coordinate
  • y – the specified Y coordinate
Returns: true if the point (x,y) is inside this Rectangle; false otherwise.
Since:    1.1
/**
     * Checks whether or not this {@code Rectangle} contains the
     * point at the specified location {@code (x,y)}.
     *
     * @param  x the specified X coordinate
     * @param  y the specified Y coordinate
     * @return    {@code true} if the point
     *            {@code (x,y)} is inside this
     *            {@code Rectangle};
     *            {@code false} otherwise.
     * @since     1.1
     */
    public boolean contains(int x, int y) {
        return inside(x, y);
    }

    
Checks whether or not this Rectangle entirely contains the specified Rectangle. 
Params:
  • r –  the specified Rectangle
Returns: true if the Rectangle is contained entirely inside this Rectangle; false otherwise
Since:    1.2
/**
     * Checks whether or not this {@code Rectangle} entirely contains
     * the specified {@code Rectangle}.
     *
     * @param     r   the specified {@code Rectangle}
     * @return    {@code true} if the {@code Rectangle}
     *            is contained entirely inside this {@code Rectangle};
     *            {@code false} otherwise
     * @since     1.2
     */
    public boolean contains(Rectangle r) {
        return contains(r.x, r.y, r.width, r.height);
    }

    
Checks whether this Rectangle entirely contains the Rectangle at the specified location (X,Y) with the specified dimensions (W,H). 
Params:
  • X – the specified X coordinate
  • Y – the specified Y coordinate
  • W –  the width of the Rectangle
  • H –  the height of the Rectangle
Returns: true if the Rectangle specified by (X, Y, W, H) is entirely enclosed inside this Rectangle; false otherwise.
Since:    1.1
/**
     * Checks whether this {@code Rectangle} entirely contains
     * the {@code Rectangle}
     * at the specified location {@code (X,Y)} with the
     * specified dimensions {@code (W,H)}.
     * @param     X the specified X coordinate
     * @param     Y the specified Y coordinate
     * @param     W   the width of the {@code Rectangle}
     * @param     H   the height of the {@code Rectangle}
     * @return    {@code true} if the {@code Rectangle} specified by
     *            {@code (X, Y, W, H)}
     *            is entirely enclosed inside this {@code Rectangle};
     *            {@code false} otherwise.
     * @since     1.1
     */
    public boolean contains(int X, int Y, int W, int H) {
        int w = this.width;
        int h = this.height;
        if ((w | h | W | H) < 0) {
            // At least one of the dimensions is negative...
            return false;
        }
        // Note: if any dimension is zero, tests below must return false...
        int x = this.x;
        int y = this.y;
        if (X < x || Y < y) {
            return false;
        }
        w += x;
        W += X;
        if (W <= X) {
            // X+W overflowed or W was zero, return false if...
            // either original w or W was zero or
            // x+w did not overflow or
            // the overflowed x+w is smaller than the overflowed X+W
            if (w >= x || W > w) return false;
        } else {
            // X+W did not overflow and W was not zero, return false if...
            // original w was zero or
            // x+w did not overflow and x+w is smaller than X+W
            if (w >= x && W > w) return false;
        }
        h += y;
        H += Y;
        if (H <= Y) {
            if (h >= y || H > h) return false;
        } else {
            if (h >= y && H > h) return false;
        }
        return true;
    }

    
Checks whether or not this Rectangle contains the point at the specified location (X,Y). 
Params:
  • X – the specified X coordinate
  • Y – the specified Y coordinate
Returns: true if the point (X,Y) is inside this Rectangle; false otherwise.
Deprecated:As of JDK version 1.1, replaced by contains(int, int).
/**
     * Checks whether or not this {@code Rectangle} contains the
     * point at the specified location {@code (X,Y)}.
     *
     * @param  X the specified X coordinate
     * @param  Y the specified Y coordinate
     * @return    {@code true} if the point
     *            {@code (X,Y)} is inside this
     *            {@code Rectangle};
     *            {@code false} otherwise.
     * @deprecated As of JDK version 1.1,
     * replaced by {@code contains(int, int)}.
     */
    @Deprecated
    public boolean inside(int X, int Y) {
        int w = this.width;
        int h = this.height;
        if ((w | h) < 0) {
            // At least one of the dimensions is negative...
            return false;
        }
        // Note: if either dimension is zero, tests below must return false...
        int x = this.x;
        int y = this.y;
        if (X < x || Y < y) {
            return false;
        }
        w += x;
        h += y;
        //    overflow || intersect
        return ((w < x || w > X) &&
                (h < y || h > Y));
    }

    
Determines whether or not this Rectangle and the specified Rectangle intersect. Two rectangles intersect if their intersection is nonempty. 
Params:
  • r – the specified Rectangle
Returns: true if the specified Rectangle and this Rectangle intersect; false otherwise.
/**
     * Determines whether or not this {@code Rectangle} and the specified
     * {@code Rectangle} intersect. Two rectangles intersect if
     * their intersection is nonempty.
     *
     * @param r the specified {@code Rectangle}
     * @return    {@code true} if the specified {@code Rectangle}
     *            and this {@code Rectangle} intersect;
     *            {@code false} otherwise.
     */
    public boolean intersects(Rectangle r) {
        int tw = this.width;
        int th = this.height;
        int rw = r.width;
        int rh = r.height;
        if (rw <= 0 || rh <= 0 || tw <= 0 || th <= 0) {
            return false;
        }
        int tx = this.x;
        int ty = this.y;
        int rx = r.x;
        int ry = r.y;
        rw += rx;
        rh += ry;
        tw += tx;
        th += ty;
        //      overflow || intersect
        return ((rw < rx || rw > tx) &&
                (rh < ry || rh > ty) &&
                (tw < tx || tw > rx) &&
                (th < ty || th > ry));
    }

    
Computes the intersection of this Rectangle with the specified Rectangle. Returns a new Rectangle that represents the intersection of the two rectangles. If the two rectangles do not intersect, the result will be an empty rectangle. 
Params:
  • r –  the specified Rectangle
Returns: the largest Rectangle contained in both the specified Rectangle and in this Rectangle; or if the rectangles do not intersect, an empty rectangle.
/**
     * Computes the intersection of this {@code Rectangle} with the
     * specified {@code Rectangle}. Returns a new {@code Rectangle}
     * that represents the intersection of the two rectangles.
     * If the two rectangles do not intersect, the result will be
     * an empty rectangle.
     *
     * @param     r   the specified {@code Rectangle}
     * @return    the largest {@code Rectangle} contained in both the
     *            specified {@code Rectangle} and in
     *            this {@code Rectangle}; or if the rectangles
     *            do not intersect, an empty rectangle.
     */
    public Rectangle intersection(Rectangle r) {
        int tx1 = this.x;
        int ty1 = this.y;
        int rx1 = r.x;
        int ry1 = r.y;
        long tx2 = tx1; tx2 += this.width;
        long ty2 = ty1; ty2 += this.height;
        long rx2 = rx1; rx2 += r.width;
        long ry2 = ry1; ry2 += r.height;
        if (tx1 < rx1) tx1 = rx1;
        if (ty1 < ry1) ty1 = ry1;
        if (tx2 > rx2) tx2 = rx2;
        if (ty2 > ry2) ty2 = ry2;
        tx2 -= tx1;
        ty2 -= ty1;
        // tx2,ty2 will never overflow (they will never be
        // larger than the smallest of the two source w,h)
        // they might underflow, though...
        if (tx2 < Integer.MIN_VALUE) tx2 = Integer.MIN_VALUE;
        if (ty2 < Integer.MIN_VALUE) ty2 = Integer.MIN_VALUE;
        return new Rectangle(tx1, ty1, (int) tx2, (int) ty2);
    }

    
Computes the union of this Rectangle with the specified Rectangle. Returns a new Rectangle that represents the union of the two rectangles. 
 If either Rectangle has any dimension less than zero the rules for non-existent rectangles apply. If only one has a dimension less than zero, then the result will be a copy of the other Rectangle. If both have dimension less than zero, then the result will have at least one dimension less than zero. 
 If the resulting Rectangle would have a dimension too large to be expressed as an int, the result will have a dimension of Integer.MAX_VALUE along that dimension. 
Params:
  • r – the specified Rectangle
Returns: the smallest Rectangle containing both the specified Rectangle and this Rectangle.
/**
     * Computes the union of this {@code Rectangle} with the
     * specified {@code Rectangle}. Returns a new
     * {@code Rectangle} that
     * represents the union of the two rectangles.
     * <p>
     * If either {@code Rectangle} has any dimension less than zero
     * the rules for <a href=#NonExistent>non-existent</a> rectangles
     * apply.
     * If only one has a dimension less than zero, then the result
     * will be a copy of the other {@code Rectangle}.
     * If both have dimension less than zero, then the result will
     * have at least one dimension less than zero.
     * <p>
     * If the resulting {@code Rectangle} would have a dimension
     * too large to be expressed as an {@code int}, the result
     * will have a dimension of {@code Integer.MAX_VALUE} along
     * that dimension.
     * @param r the specified {@code Rectangle}
     * @return    the smallest {@code Rectangle} containing both
     *            the specified {@code Rectangle} and this
     *            {@code Rectangle}.
     */
    public Rectangle union(Rectangle r) {
        long tx2 = this.width;
        long ty2 = this.height;
        if ((tx2 | ty2) < 0) {
            // This rectangle has negative dimensions...
            // If r has non-negative dimensions then it is the answer.
            // If r is non-existent (has a negative dimension), then both
            // are non-existent and we can return any non-existent rectangle
            // as an answer.  Thus, returning r meets that criterion.
            // Either way, r is our answer.
            return new Rectangle(r);
        }
        long rx2 = r.width;
        long ry2 = r.height;
        if ((rx2 | ry2) < 0) {
            return new Rectangle(this);
        }
        int tx1 = this.x;
        int ty1 = this.y;
        tx2 += tx1;
        ty2 += ty1;
        int rx1 = r.x;
        int ry1 = r.y;
        rx2 += rx1;
        ry2 += ry1;
        if (tx1 > rx1) tx1 = rx1;
        if (ty1 > ry1) ty1 = ry1;
        if (tx2 < rx2) tx2 = rx2;
        if (ty2 < ry2) ty2 = ry2;
        tx2 -= tx1;
        ty2 -= ty1;
        // tx2,ty2 will never underflow since both original rectangles
        // were already proven to be non-empty
        // they might overflow, though...
        if (tx2 > Integer.MAX_VALUE) tx2 = Integer.MAX_VALUE;
        if (ty2 > Integer.MAX_VALUE) ty2 = Integer.MAX_VALUE;
        return new Rectangle(tx1, ty1, (int) tx2, (int) ty2);
    }

    
Adds a point, specified by the integer arguments newx,newy to the bounds of this Rectangle. 
 If this Rectangle has any dimension less than zero, the rules for non-existent rectangles apply. In that case, the new bounds of this Rectangle will have a location equal to the specified coordinates and width and height equal to zero. 
 After adding a point, a call to contains with the added point as an argument does not necessarily return true. The contains method does not return true for points on the right or bottom edges of a Rectangle. Therefore, if the added point falls on the right or bottom edge of the enlarged Rectangle, contains returns false for that point. If the specified point must be contained within the new Rectangle, a 1x1 rectangle should be added instead: 
    r.add(newx, newy, 1, 1);



Params:
  • newx – the X coordinate of the new point
  • newy – the Y coordinate of the new point
/**
     * Adds a point, specified by the integer arguments {@code newx,newy}
     * to the bounds of this {@code Rectangle}.
     * <p>
     * If this {@code Rectangle} has any dimension less than zero,
     * the rules for <a href=#NonExistent>non-existent</a>
     * rectangles apply.
     * In that case, the new bounds of this {@code Rectangle} will
     * have a location equal to the specified coordinates and
     * width and height equal to zero.
     * <p>
     * After adding a point, a call to {@code contains} with the
     * added point as an argument does not necessarily return
     * {@code true}. The {@code contains} method does not
     * return {@code true} for points on the right or bottom
     * edges of a {@code Rectangle}. Therefore, if the added point
     * falls on the right or bottom edge of the enlarged
     * {@code Rectangle}, {@code contains} returns
     * {@code false} for that point.
     * If the specified point must be contained within the new
     * {@code Rectangle}, a 1x1 rectangle should be added instead:
     * <pre>
     *     r.add(newx, newy, 1, 1);
     * </pre>
     * @param newx the X coordinate of the new point
     * @param newy the Y coordinate of the new point
     */
    public void add(int newx, int newy) {
        if ((width | height) < 0) {
            this.x = newx;
            this.y = newy;
            this.width = this.height = 0;
            return;
        }
        int x1 = this.x;
        int y1 = this.y;
        long x2 = this.width;
        long y2 = this.height;
        x2 += x1;
        y2 += y1;
        if (x1 > newx) x1 = newx;
        if (y1 > newy) y1 = newy;
        if (x2 < newx) x2 = newx;
        if (y2 < newy) y2 = newy;
        x2 -= x1;
        y2 -= y1;
        if (x2 > Integer.MAX_VALUE) x2 = Integer.MAX_VALUE;
        if (y2 > Integer.MAX_VALUE) y2 = Integer.MAX_VALUE;
        reshape(x1, y1, (int) x2, (int) y2);
    }

    
Adds the specified Point to the bounds of this Rectangle. 
 If this Rectangle has any dimension less than zero, the rules for non-existent rectangles apply. In that case, the new bounds of this Rectangle will have a location equal to the coordinates of the specified Point and width and height equal to zero. 
 After adding a Point, a call to contains with the added Point as an argument does not necessarily return true. The contains method does not return true for points on the right or bottom edges of a Rectangle. Therefore if the added Point falls on the right or bottom edge of the enlarged Rectangle, contains returns false for that Point. If the specified point must be contained within the new Rectangle, a 1x1 rectangle should be added instead: 
    r.add(pt.x, pt.y, 1, 1);



Params:
  • pt – the new Point to add to this Rectangle
/**
     * Adds the specified {@code Point} to the bounds of this
     * {@code Rectangle}.
     * <p>
     * If this {@code Rectangle} has any dimension less than zero,
     * the rules for <a href=#NonExistent>non-existent</a>
     * rectangles apply.
     * In that case, the new bounds of this {@code Rectangle} will
     * have a location equal to the coordinates of the specified
     * {@code Point} and width and height equal to zero.
     * <p>
     * After adding a {@code Point}, a call to {@code contains}
     * with the added {@code Point} as an argument does not
     * necessarily return {@code true}. The {@code contains}
     * method does not return {@code true} for points on the right
     * or bottom edges of a {@code Rectangle}. Therefore if the added
     * {@code Point} falls on the right or bottom edge of the
     * enlarged {@code Rectangle}, {@code contains} returns
     * {@code false} for that {@code Point}.
     * If the specified point must be contained within the new
     * {@code Rectangle}, a 1x1 rectangle should be added instead:
     * <pre>
     *     r.add(pt.x, pt.y, 1, 1);
     * </pre>
     * @param pt the new {@code Point} to add to this
     *           {@code Rectangle}
     */
    public void add(Point pt) {
        add(pt.x, pt.y);
    }

    
Adds a Rectangle to this Rectangle. The resulting Rectangle is the union of the two rectangles. 
 If either Rectangle has any dimension less than 0, the result will have the dimensions of the other Rectangle. If both Rectangles have at least one dimension less than 0, the result will have at least one dimension less than 0. 
 If either Rectangle has one or both dimensions equal to 0, the result along those axes with 0 dimensions will be equivalent to the results obtained by adding the corresponding origin coordinate to the result rectangle along that axis, similar to the operation of the add(Point) method, but contribute no further dimension beyond that. 
 If the resulting Rectangle would have a dimension too large to be expressed as an int, the result will have a dimension of Integer.MAX_VALUE along that dimension. 
Params:
  • r – the specified Rectangle
/**
     * Adds a {@code Rectangle} to this {@code Rectangle}.
     * The resulting {@code Rectangle} is the union of the two
     * rectangles.
     * <p>
     * If either {@code Rectangle} has any dimension less than 0, the
     * result will have the dimensions of the other {@code Rectangle}.
     * If both {@code Rectangle}s have at least one dimension less
     * than 0, the result will have at least one dimension less than 0.
     * <p>
     * If either {@code Rectangle} has one or both dimensions equal
     * to 0, the result along those axes with 0 dimensions will be
     * equivalent to the results obtained by adding the corresponding
     * origin coordinate to the result rectangle along that axis,
     * similar to the operation of the {@link #add(Point)} method,
     * but contribute no further dimension beyond that.
     * <p>
     * If the resulting {@code Rectangle} would have a dimension
     * too large to be expressed as an {@code int}, the result
     * will have a dimension of {@code Integer.MAX_VALUE} along
     * that dimension.
     * @param  r the specified {@code Rectangle}
     */
    public void add(Rectangle r) {
        long tx2 = this.width;
        long ty2 = this.height;
        if ((tx2 | ty2) < 0) {
            reshape(r.x, r.y, r.width, r.height);
        }
        long rx2 = r.width;
        long ry2 = r.height;
        if ((rx2 | ry2) < 0) {
            return;
        }
        int tx1 = this.x;
        int ty1 = this.y;
        tx2 += tx1;
        ty2 += ty1;
        int rx1 = r.x;
        int ry1 = r.y;
        rx2 += rx1;
        ry2 += ry1;
        if (tx1 > rx1) tx1 = rx1;
        if (ty1 > ry1) ty1 = ry1;
        if (tx2 < rx2) tx2 = rx2;
        if (ty2 < ry2) ty2 = ry2;
        tx2 -= tx1;
        ty2 -= ty1;
        // tx2,ty2 will never underflow since both original
        // rectangles were non-empty
        // they might overflow, though...
        if (tx2 > Integer.MAX_VALUE) tx2 = Integer.MAX_VALUE;
        if (ty2 > Integer.MAX_VALUE) ty2 = Integer.MAX_VALUE;
        reshape(tx1, ty1, (int) tx2, (int) ty2);
    }

    
Resizes the Rectangle both horizontally and vertically. 
 This method modifies the Rectangle so that it is h units larger on both the left and right side, and v units larger at both the top and bottom. 
 The new Rectangle has (x - h, y - v) as its upper-left corner, width of (width + 2h), and a height of (height + 2v). 
 If negative values are supplied for h and v, the size of the Rectangle decreases accordingly. The grow method will check for integer overflow and underflow, but does not check whether the resulting values of width and height grow from negative to non-negative or shrink from non-negative to negative. 
Params:
  • h – the horizontal expansion
  • v – the vertical expansion
/**
     * Resizes the {@code Rectangle} both horizontally and vertically.
     * <p>
     * This method modifies the {@code Rectangle} so that it is
     * {@code h} units larger on both the left and right side,
     * and {@code v} units larger at both the top and bottom.
     * <p>
     * The new {@code Rectangle} has {@code (x - h, y - v)}
     * as its upper-left corner,
     * width of {@code (width + 2h)},
     * and a height of {@code (height + 2v)}.
     * <p>
     * If negative values are supplied for {@code h} and
     * {@code v}, the size of the {@code Rectangle}
     * decreases accordingly.
     * The {@code grow} method will check for integer overflow
     * and underflow, but does not check whether the resulting
     * values of {@code width} and {@code height} grow
     * from negative to non-negative or shrink from non-negative
     * to negative.
     * @param h the horizontal expansion
     * @param v the vertical expansion
     */
    public void grow(int h, int v) {
        long x0 = this.x;
        long y0 = this.y;
        long x1 = this.width;
        long y1 = this.height;
        x1 += x0;
        y1 += y0;

        x0 -= h;
        y0 -= v;
        x1 += h;
        y1 += v;

        if (x1 < x0) {
            // Non-existent in X direction
            // Final width must remain negative so subtract x0 before
            // it is clipped so that we avoid the risk that the clipping
            // of x0 will reverse the ordering of x0 and x1.
            x1 -= x0;
            if (x1 < Integer.MIN_VALUE) x1 = Integer.MIN_VALUE;
            if (x0 < Integer.MIN_VALUE) x0 = Integer.MIN_VALUE;
            else if (x0 > Integer.MAX_VALUE) x0 = Integer.MAX_VALUE;
        } else { // (x1 >= x0)
            // Clip x0 before we subtract it from x1 in case the clipping
            // affects the representable area of the rectangle.
            if (x0 < Integer.MIN_VALUE) x0 = Integer.MIN_VALUE;
            else if (x0 > Integer.MAX_VALUE) x0 = Integer.MAX_VALUE;
            x1 -= x0;
            // The only way x1 can be negative now is if we clipped
            // x0 against MIN and x1 is less than MIN - in which case
            // we want to leave the width negative since the result
            // did not intersect the representable area.
            if (x1 < Integer.MIN_VALUE) x1 = Integer.MIN_VALUE;
            else if (x1 > Integer.MAX_VALUE) x1 = Integer.MAX_VALUE;
        }

        if (y1 < y0) {
            // Non-existent in Y direction
            y1 -= y0;
            if (y1 < Integer.MIN_VALUE) y1 = Integer.MIN_VALUE;
            if (y0 < Integer.MIN_VALUE) y0 = Integer.MIN_VALUE;
            else if (y0 > Integer.MAX_VALUE) y0 = Integer.MAX_VALUE;
        } else { // (y1 >= y0)
            if (y0 < Integer.MIN_VALUE) y0 = Integer.MIN_VALUE;
            else if (y0 > Integer.MAX_VALUE) y0 = Integer.MAX_VALUE;
            y1 -= y0;
            if (y1 < Integer.MIN_VALUE) y1 = Integer.MIN_VALUE;
            else if (y1 > Integer.MAX_VALUE) y1 = Integer.MAX_VALUE;
        }

        reshape((int) x0, (int) y0, (int) x1, (int) y1);
    }

    
{@inheritDoc}

Since:1.2
/**
     * {@inheritDoc}
     * @since 1.2
     */
    public boolean isEmpty() {
        return (width <= 0) || (height <= 0);
    }

    
{@inheritDoc}

Since:1.2
/**
     * {@inheritDoc}
     * @since 1.2
     */
    public int outcode(double x, double y) {
        /*
         * Note on casts to double below.  If the arithmetic of
         * x+w or y+h is done in int, then we may get integer
         * overflow. By converting to double before the addition
         * we force the addition to be carried out in double to
         * avoid overflow in the comparison.
         *
         * See bug 4320890 for problems that this can cause.
         */
        int out = 0;
        if (this.width <= 0) {
            out |= OUT_LEFT | OUT_RIGHT;
        } else if (x < this.x) {
            out |= OUT_LEFT;
        } else if (x > this.x + (double) this.width) {
            out |= OUT_RIGHT;
        }
        if (this.height <= 0) {
            out |= OUT_TOP | OUT_BOTTOM;
        } else if (y < this.y) {
            out |= OUT_TOP;
        } else if (y > this.y + (double) this.height) {
            out |= OUT_BOTTOM;
        }
        return out;
    }

    
{@inheritDoc}

Since:1.2
/**
     * {@inheritDoc}
     * @since 1.2
     */
    public Rectangle2D createIntersection(Rectangle2D r) {
        if (r instanceof Rectangle) {
            return intersection((Rectangle) r);
        }
        Rectangle2D dest = new Rectangle2D.Double();
        Rectangle2D.intersect(this, r, dest);
        return dest;
    }

    
{@inheritDoc}

Since:1.2
/**
     * {@inheritDoc}
     * @since 1.2
     */
    public Rectangle2D createUnion(Rectangle2D r) {
        if (r instanceof Rectangle) {
            return union((Rectangle) r);
        }
        Rectangle2D dest = new Rectangle2D.Double();
        Rectangle2D.union(this, r, dest);
        return dest;
    }

    
Checks whether two rectangles are equal.

 The result is true if and only if the argument is not null and is a Rectangle object that has the same upper-left corner, width, and height as this Rectangle. 
Params:
  • obj – the Object to compare with this Rectangle
Returns: true if the objects are equal; false otherwise.
/**
     * Checks whether two rectangles are equal.
     * <p>
     * The result is {@code true} if and only if the argument is not
     * {@code null} and is a {@code Rectangle} object that has the
     * same upper-left corner, width, and height as
     * this {@code Rectangle}.
     * @param obj the {@code Object} to compare with
     *                this {@code Rectangle}
     * @return    {@code true} if the objects are equal;
     *            {@code false} otherwise.
     */
    public boolean equals(Object obj) {
        if (obj instanceof Rectangle) {
            Rectangle r = (Rectangle)obj;
            return ((x == r.x) &&
                    (y == r.y) &&
                    (width == r.width) &&
                    (height == r.height));
        }
        return super.equals(obj);
    }

    
Returns a String representing this Rectangle and its values. 
Returns:a String representing this Rectangle object's coordinate and size values.
/**
     * Returns a {@code String} representing this
     * {@code Rectangle} and its values.
     * @return a {@code String} representing this
     *               {@code Rectangle} object's coordinate and size values.
     */
    public String toString() {
        return getClass().getName() + "[x=" + x + ",y=" + y + ",width=" + width + ",height=" + height + "]";
    }
}