程序运行后界面如下:

import java.awt.*;
import java.awt.event.*;
//*********Found******** 
public class Java_3 implements ActionListener, ________________ {
    Frame f;
    Button be, bw, bs, bn, bc;
 
    public void create() {
        //*********Found******** 
        f = ________________;
        be = new Button("East");
        //*********Found******** 
        bw = new Button(________________);
        bs = new Button("South");
        bn = new Button("North");
        bc = new Button("Exit");
        //*********Found******** 
        f.add(be, ________________);
        f.add(bw, "West");
        f.add(bs, "South");
        f.add(bn, "North");
        f.add(bc, "Center");
        bc.addActionListener(this); //为按钮注册监听器 
        f.addWindowListener(this); //为按钮注册监听器 
        f.setSize(200, 200);
        //*********Found******** 
        f.setVisible(________________);
    }
 
    public static void main(String args[]) {
        Java_3 fa = new Java_3();
        fa.create();
    }
 
    public void actionPerformed(ActionEvent e) {
        System.exit(0); //实现窗口关闭功能 
    }
 
    public void windowOpened(WindowEvent e) {
    }
 
    public void windowClosing(WindowEvent e) {
        System.exit(0); //实现窗口关闭功能 
    }
 
    public void windowClosed(WindowEvent e) {
    }
 
    public void windowIconified(WindowEvent e) {
    }
 
    public void windowDeiconified(WindowEvent e) {
    }
 
    public void windowActivated(WindowEvent e) {
    }
 
    public void windowDeactivated(WindowEvent e) {
    }
}