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/* * @(#)Dimension.java 1.34 06/02/24 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.awt; import java.awt.geom.Dimension2D; /** * 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. * * @version 1.34, 02/24/06 * @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. * * @serial * @see #getSize * @see #setSize * @since 1.0 */ public int width; /** * 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 */ private static native void initIDs(); static { /* ensure that the necessary native libraries are loaded */ Toolkit.loadLibraries(); if (!GraphicsEnvironment.isHeadless()) { initIDs(); } } /** * 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 <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 <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 */ public double getWidth() { return width; } /** * {@inheritDoc} * @since 1.2 */ public double getHeight() { return height; } /** * 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 <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 */ public Dimension getSize() { return new Dimension(width, height); } /** * 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 <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. */ 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 <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 * <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 + "]"; } }