用JAVA编一个“猜数”应用程序，该程序随机在1到1000的范围中选择一个供用户猜测的整数，我写的哪里错了？

帮你修改好了。

package caishuzi;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Cai {
/**
* @param args
*/static int num;
public static void main(String[] args) {
JFrame f=new JFrame();
JLabel c=new JLabel("Guess a number between 1 and 1000");
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
JPanel p5=new JPanel();
final JTextField a=new JTextField(4);
JButton b=new JButton("获取随机数");
JButton b1=new JButton("确定");
final JTextArea area=new JTextArea();
a.setSize(100, 100);
p1.add(c);
p2.add(a);
p3.add(b);
p4.add(b1);
p5.add(area);
f.setTitle("猜数字");
f.setSize(300, 300);
f.add(p1,BorderLayout.BEFORE_FIRST_LINE);
f.add(p2,BorderLayout.WEST);
f.add(p3,BorderLayout.AFTER_LAST_LINE);
f.add(p4,BorderLayout.AFTER_LINE_ENDS);
f.add(p5,BorderLayout.CENTER);
f.setVisible(true);
b.addActionListener(new ActionListener(){
//Congratulations.You guessed the number

public void actionPerformed(ActionEvent e) {
Random a=new Random();
num=1+a.nextInt(1000);
}
});

b1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e1) {
int i=Integer.parseInt(a.getText());
if(i>num)
area.setText("Too high.Try again");
if(i area.setText("Too low.Try again");
if(i==num)
area.setText("Congratulations.You guessed the number");
}
});

// TODO Auto-generated method stub

}
}

num=1+a.nextInt(1000);

改成num=1+Math.abs(a.nexInt%1000);

先使用随机函数对数字进行随机处理，当用户对数字猜测后显示用户的结果是做switch多分支判断