helloapplet.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

import javax.swing.*;
import java.awt.Color;

/** This program adds a Hello World message to a filled green
 *  oval in the center of a JFrame. 
 */
public class HelloApplet extends JApplet {
	public HelloApplet( )  {
        super();
        setLayout(null);
        Oval dot = new Oval(100, 100, 200, 200);
        dot.setBackground(Color.green);
        dot.repaint();
     	add(dot, 0);
        JLabel helloMsg = new JLabel("Hello World!");
        helloMsg.setBounds(20, 85, 160, 30);
        helloMsg.setHorizontalAlignment(JLabel.CENTER);
        helloMsg.repaint();
        dot.add(helloMsg, 0);
        repaint();
    }
}