求java实例

/*
* HelloToJava.java
*
* Created on 2004年7月5日, 下午15:19
*/
/**
*
* @author jiazh
*/
import java.awt.Graphics;
public class HelloToJava extends java.applet.Applet {
/** Initialization method that will be called after the applet is loaded
* into the browser.
*/
public String sHello;
public void init() {
// TODO start asynchronous download of heavy resources
sHello="欢迎来到Java世界！";
}
public void paint(Graphics g){
g.drawString(sHello, 50, 50);
}
// TODO overwrite start(), stop() and destroy() methods
}

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

public class Test extends JFrame
{
private Container contentPane;
private JLabel lbl;

public Test()
{
super("Test");
contentPane = getContentPane();
lbl = new JLabel