java 简单猜数字游戏详解编程语言

import java.awt.*;   
import java.awt.event.*;   
import javax.swing.*;   
   
public class lc4 implements ActionListener   {   
    int n=13;   
       
    JFrame jf=new JFrame("Example");   
           
    JTextField tf1=new JTextField(5);   
    JTextField tf2=new JTextField(15);   
       
    Label l=new Label("Please Input A Number:");   
       
    JButton b=new JButton("Close");   
   
    public static void main(String[] args) {   
        lc4 that=new lc4();   
        that.go();   
    }   
       
    public void go(){   
        jf.getContentPane().setLayout(new FlowLayout());   
           
        l.setBackground(Color.yellow);   
        tf1.setBackground(Color.green);   
        tf2.setBackground(Color.red);   
        b.setBackground(Color.gray);   
           
        jf.getContentPane().add(l);   
        jf.getContentPane().add(tf1);   
        jf.getContentPane().add(tf2);   
        jf.getContentPane().add(b);   
           
        tf1.addActionListener(this);   
        tf2.addActionListener(this);   
        b.addActionListener(this);   
           
        jf.pack();   
        jf.setVisible(true);   
    }   
    public void actionPerformed(ActionEvent e) {   
           
        if(n==Integer.valueOf(tf1.getText())){   
            tf2.setText("U R Right!");   
        }   
        else if(n<Integer.valueOf(tf1.getText())){   
            tf2.setText("Bigger!");   
        }   
        else{   
            tf2.setText("Smaller!");   
        }   
           
        if((JButton)e.getSource()==b){   
            System.exit(0);   
        }   
    }   
   
   
}