java代码实例第49课

test049.java

package pack02;

import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class test049 extends JFrame
{

  private final int OVAL_WIDTH = 80;
  private final int OVAL_HEIGHT = 80;

  public test049()
  {
    this.setTitle("graphic绘制圆形");
    this.setContentPane(new MyDrawPanel());
    this.setSize(500,500);
    this.setVisible(true);
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
  }

  private class MyDrawPanel extends JPanel
  {
    public void paint(Graphics g)
    {
      super.paint(g);
      g.drawOval(10, 10, OVAL_WIDTH, OVAL_HEIGHT);
      g.drawOval(80, 10, OVAL_WIDTH, OVAL_HEIGHT);
      g.drawOval(150, 10, OVAL_WIDTH, OVAL_HEIGHT);
      g.drawOval(50, 70, OVAL_WIDTH, OVAL_HEIGHT);
      g.drawOval(120, 70, OVAL_WIDTH, OVAL_HEIGHT);
    }
  }

  public static void main(String[] args)
  {
    test049 s1 = new test049();

  }

}