/* Dimension.java -- represents a 2-dimensional span   Copyright (C) 1999, 2000, 2002 Free Software FoundationThis file is part of GNU Classpath.GNU Classpath is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2, or (at your option)any later version.GNU Classpath is distributed in the hope that it will be useful, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNUGeneral Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU Classpath; see the file COPYING.  If not, write to theFree Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA02110-1301 USA.Linking this library statically or dynamically with other modules ismaking a combined work based on this library.  Thus, the terms andconditions of the GNU General Public License cover the wholecombination.As a special exception, the copyright holders of this library give youpermission to link this library with independent modules to produce anexecutable, regardless of the license terms of these independentmodules, and to copy and distribute the resulting executable underterms of your choice, provided that you also meet, for each linkedindependent module, the terms and conditions of the license of thatmodule.  An independent module is a module which is not derived fromor based on this library.  If you modify this library, you may extendthis exception to your version of the library, but you are notobligated to do so.  If you do not wish to do so, delete thisexception statement from your version. */package java.awt;import java.awt.geom.Dimension2D;import java.io.Serializable;/** * This class holds a width and height value pair. This is used in plenty * of windowing classes, but also has geometric meaning. * * <p>It is valid for a dimension to have negative width or height; but it * is considered to have no area. Therefore, the behavior in various methods * is undefined in such a case. * * <p>There are some public fields; if you mess with them in an inconsistent * manner, it is your own fault when you get invalid results. Also, this * class is not threadsafe. * * @author Per Bothner (bothner@cygnus.com) * @author Aaron M. Renn (arenn@urbanophile.com) * @author Eric Blake (ebb9@email.byu.edu) * @see Component * @see LayoutManager * @since 1.0 * @status updated to 1.14 */public class Dimension extends Dimension2D implements Serializable{  /**   * Compatible with JDK 1.0+.   */  private static final long serialVersionUID = 4723952579491349524L;  /**   * The width of this object.   *   * @see #getSize()   * @see #setSize(double, double)   * @serial the width   */  public int width;  /**   * The height of this object.   *   * @see #getSize()   * @see #setSize(double, double)   * @serial the height   */  public int height;  /**   * Create a new Dimension with a width and height of zero.   */  public Dimension()  {  }  /**   * Create a new Dimension with width and height identical to that of the   * specified dimension.   *   * @param d the Dimension to copy   * @throws NullPointerException if d is null   */  public Dimension(Dimension d)  {    width = d.width;    height = d.height;  }  /**   * Create a new Dimension with the specified width and height.   *   * @param w the width of this object   * @param h the height of this object   */  public Dimension(int w, int h)  {    width = w;    height = h;  }  /**   * Gets the width of this dimension.   *   * @return the width, as a double   */  public double getWidth()  {    return width;  }  /**   * Gets the height of this dimension.   *   * @return the height, as a double   */  public double getHeight()  {    return height;  }  /**   * Sets the size of this dimension. The values are rounded to int.   *   * @param w the new width   * @param h the new height   * @since 1.2   */  public void setSize(double w, double h)  {    width = (int) w;    height = (int) h;  }  /**   * Returns the size of this dimension. A pretty useless method, as this is   * already a dimension.   *   * @return a copy of this dimension   * @see #setSize(Dimension)   * @since 1.1   */  public Dimension getSize()  {    return new Dimension(width, height);  }  /**   * Sets the width and height of this object to match that of the   * specified object.   *   * @param d the Dimension to get the new width and height from   * @throws NullPointerException if d is null   * @see #getSize()   * @since 1.1   */  public void setSize(Dimension d)  {    width = d.width;    height = d.height;  }  /**   * Sets the width and height of this object to the specified values.   *   * @param w the new width value   * @param h the new height value   */  public void setSize(int w, int h)  {    width = w;    height = h;  }  /**   * Tests this object for equality against the specified object.  This will   * be true if and only if the specified object is an instance of   * Dimension2D, and has the same width and height.   *   * @param obj the object to test against   * @return true if the object is equal to this   */  public boolean equals(Object obj)  {    if (! (obj instanceof Dimension))      return false;    Dimension dim = (Dimension) obj;    return height == dim.height && width == dim.width;  }  /**   * Return the hashcode for this object. It is not documented, but appears   * to be <code>((width + height) * (width + height + 1) / 2) + width</code>.   *   * @return the hashcode   */  public int hashCode()  {    // Reverse engineering this was fun!    return (width + height) * (width + height + 1) / 2 + width;  }  /**   * Returns a string representation of this object. The format is:   * <code>getClass().getName() + "[width=" + width + ",height=" + height   * + ']'</code>.   *   * @return a string representation of this object   */  public String toString()  {    return getClass().getName()      + "[width=" + width + ",height=" + height + ']';  }} // class Dimension