Mega Code Archive
Extends JComponent to exercise Graphics
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* A frame that contains a message panel
*/
class NotHelloWorldFrame extends JFrame
{
public NotHelloWorldFrame()
{
setTitle("NotHelloWorld");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
// add panel to frame
NotHelloWorldComponent comp = new NotHelloWorldComponent();
add(comp);
}
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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