content: // ===============================================================================
  // Authors: AFRL/RQQD
  // Organization: Air Force Research Laboratory, Aerospace Systems Directorate, Power and Control Division
  // 
  // Copyright (c) 2017 Government of the United State of America, as represented by
  // the Secretary of the Air Force.  No copyright is claimed in the United States under
  // Title 17, U.S. Code.  All Other Rights Reserved.
  // ===============================================================================
  
  /*
   * GRAL: GRAphing Library for Java(R)
   *
   * (C) Copyright 2009-2013 Erich Seifert <dev[at]erichseifert.de>,
   * Michael Seifert <mseifert[at]error-reports.org>
   *
   * This file is part of GRAL.
   *
   * GRAL is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * GRAL is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with GRAL.  If not, see <http://www.gnu.org/licenses/>.
   */
  package de.erichseifert.gral.util;
  
  import java.io.Serializable;
  import java.util.Locale;
  
  /**
   * <p>Class that stores the horizontal and vertical extent of an object.</p>
   * <p>This implementation adds support of double values to
   * {@code java.awt.geom.Dimension2D}.</p>
   */
  public abstract class Dimension2D extends java.awt.geom.Dimension2D
  		implements Serializable {
  	/** Version id for serialization. */
  	private static final long serialVersionUID = 6961198271520384282L;
  
  	/**
  	 * Creates a new Dimension2D object.
  	 */
  	public Dimension2D() {
  	}
  
  	/**
  	 * Class that stores double values.
  	 */
  	public static class Double extends Dimension2D {
  		/** Version id for serialization. */
  		private static final long serialVersionUID = -4341712269787906650L;
  
  		/** Horizontal extension. */
  		private double width;
  		/** Vertical extension. */
  		private double height;
  
  		/**
  		 * Creates a new Dimension2D object with zero width and height.
  		 */
  		public Double() {
  			setSize(0.0, 0.0);
  		}
  
  		/**
  		 * Creates a new Dimension2D object with the specified width and
  		 * height.
  		 * @param width Width.
  		 * @param height Height.
  		 */
  		public Double(double width, double height) {
  			setSize(width, height);
  		}
  
  		@Override
  		public double getHeight() {
  			return height;
  		}
  
  		@Override
  		public double getWidth() {
  			return width;
  		}
  
  		@Override
  		public void setSize(double width, double height) {
  			this.width = width;
  			this.height = height;
  		}
  
  		@Override
  		public String toString() {
  			return String.format(Locale.US,
  					"%s[width=%f, height=%f]", //$NON-NLS-1$
  					getClass().getName(), width, height);
  		}
  
  		@Override
  		public boolean equals(Object obj) {
  			if (!(obj instanceof java.awt.geom.Dimension2D)) {
  				return false;
  			}
  			java.awt.geom.Dimension2D dim = (java.awt.geom.Dimension2D) obj;
  			return (getWidth() == dim.getWidth()) &&
  				(getHeight() == dim.getHeight());
  		}
  
  		@Override
  		public int hashCode() {
  			long bits = java.lang.Double.doubleToLongBits(getWidth());
  			bits ^= java.lang.Double.doubleToLongBits(getHeight()) * 31;
  			return ((int) bits) ^ ((int) (bits >> 32));
  		}
  	}
  }
  