Java Reference
In-Depth Information
Display 18.16 paintComponent Demonstration (part 1 of 2)
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import java.awt.GridLayout;
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import java.awt.Graphics;
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import java.awt.Color;
6 public class PaintComponentDemo extends JFrame
7{
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public static final int FRAME_WIDTH = 400;
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public static final int FRAME_HEIGHT = 400;
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private class FancyPanel extends JPanel
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{
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public void paintComponent(Graphics g)
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{
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super .paintComponent(g);
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setBackground(Color.YELLOW);
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g.drawOval(FRAME_WIDTH/4, FRAME_HEIGHT/8,
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FRAME_WIDTH/2, FRAME_HEIGHT/6);
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}
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}
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public static void main(String[] args)
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{
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PaintComponentDemo w = new PaintComponentDemo();
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w.setVisible( true );
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}
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public PaintComponentDemo()
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{
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setSize(FRAME_WIDTH, FRAME_HEIGHT);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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setTitle("The Oval Is in a Panel");
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setLayout( new GridLayout(2, 1));
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FancyPanel p = new FancyPanel();
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add(p);
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JPanel whitePanel = new JPanel();
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whitePanel.setBackground(Color.WHITE);
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add(whitePanel);
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}
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}
(continued)
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