java 简单猜数字游戏，java猜数字游戏,import java.

java 简单猜数字游戏，java猜数字游戏,import java.

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);          }      }  }