求java的编程答案，我会加分的~~~

Question

编写一个Application，创建并显示一个200*100的Frame，该Frame的标题为：”Hello”。向Frame容器中添加一个标签为”Press Me”的按钮。编写代码，使得按钮被点击后，系统输出”您好! 欢迎进入Java世界!”字符串。要求程序能够处理窗口的关闭，正常退出。

附：可能用到的工具：
WindowListener接口中包括的方法定义：
public void windowClosing(WindowEvent e)；
public void windowOpened(WindowEvent e)；
public void windowIconified(WindowEvent e)；
public void windowDeiconified(WindowEvent e)；
public void windowClosed(WindowEvent e)；
public void windowActivated(WindowEvent e)；
public void windowDeactivated(WindowEvent e)；

ActionListener接口中包括的方法定义：
public void actionPerformed(ActionEvent e)；

Answer 1

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

class baidu extends JFrame{
JButton btnPressMe;
public baidu(){
super("Hello");
this.setLayout(null);

btnPressMe=new JButton("press me");
btnPressMe.setSize(100,30);
btnPressMe.addActionListener(new pressMe());
this.add(btnPressMe);

this.setSize(200, 200);
this.addWindowListener(new winClose());
this.setVisible(true);

}

public static void main(String[] args){
new baidu();
}

class pressMe implements ActionListener{
public void actionPerformed(ActionEvent ae){ /*响应单击事件*/
JOptionPane.showMessageDialog(null,"你好，欢迎进入Java世界!"); /*弹出对话框显示*/
}
}
class winClose implements WindowListener{
public void windowClosing(WindowEvent we){ /*响应windows窗体关闭事件*/
System.exit(0);
}
public void windowOpened(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
}

}