/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package QandE;import javax.swing.JComponent;import javax.swing.BorderFactory;import java.awt.BasicStroke;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Insets;import java.awt.Color;import java.awt.geom.Line2D;/* XMarksTheSpot is used by ComponentDisplayer. */public class XMarksTheSpot extends JComponent {    Dimension preferredSize = null;        public XMarksTheSpot() {        setOpaque(true);                //Set the border using either a MatteBorder (standard, used in         //Exercise 1) or a StripeBorder (custom, used in Exercise 3).        //You can find the exercises here:        //  http://java.sun.com/docs/books/tutorial/uiswing/QandE/questions-ch6.html        setBorder(BorderFactory.createMatteBorder(5,5,5,5, Color.BLACK));        //setBorder(new StripeBorder());    }        protected void paintComponent(Graphics g) {        if (isOpaque()) {            g.setColor(getBackground());            g.fillRect(0,0,getWidth(),getHeight());            g.setColor(getForeground());        }                    Graphics2D g2 = (Graphics2D)g;        Insets insets = getInsets();        g2.setStroke(new BasicStroke(5.0f));        g2.draw(new Line2D.Double(insets.left,                                  insets.top,                                  getWidth() - insets.right,                                  getHeight() - insets.bottom));        g2.draw(new Line2D.Double(insets.left,                                  getHeight() - insets.bottom,                                  getWidth() - insets.right,                                  insets.top));    }        public Dimension getPreferredSize() {        if (preferredSize == null) {            return new Dimension(250,100);         } else {            return super.getPreferredSize();        }    }        public void setPreferredSize(Dimension newPrefSize) {        preferredSize = newPrefSize;        super.setPreferredSize(newPrefSize);    }}