extends JComponent to exercise Graphics : Graphic Environment « 2D Graphics GUI « Java

extends JComponent to exercise Graphics

   This program is a part of the companion code for Core Java 8th ed.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.

import java.awt.EventQueue;
import java.awt.Graphics;

import javax.swing.JComponent;
import javax.swing.JFrame;

 * @version 1.32 2007-06-12
 * @author Cay Horstmann
public class NotHelloWorld
   public static void main(String[] args)
      EventQueue.invokeLater(new Runnable()
            public void run()
               NotHelloWorldFrame frame = new NotHelloWorldFrame();

 * A frame that contains a message panel
class NotHelloWorldFrame extends JFrame
   public NotHelloWorldFrame()

      // add panel to frame

      NotHelloWorldComponent comp = new NotHelloWorldComponent();

   public static final int DEFAULT_WIDTH = 300;
   public static final int DEFAULT_HEIGHT = 200;

 * A component that displays a message.
class NotHelloWorldComponent extends JComponent
   public void paintComponent(Graphics g)
      g.drawString("Not a Hello, World program", MESSAGE_X, MESSAGE_Y);

   public static final int MESSAGE_X = 75;
   public static final int MESSAGE_Y = 100;


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