简单的Java图形化抽奖程序

要求：设计图形界面程序实现抽奖游戏。玩家输入0-9范围之内的一个数字，抽奖开始后，随机产生0-9范围内的3个数字，如果3个数字都和玩家输入的数字相同，则获得一等奖，有两个数字和玩家输入的数字相同，则获得二等奖，有一个数字和玩家输入的数字相同，则获得三等奖。如果没有任何一个数组和玩家输入的数字相同，则表示没有获奖

import java.awt.*;
import java.awt.event.*;
import java.util.Random;
public class chu {
        public static void main(String[] args) {
            JFrame title = new JFrame("抽奖");
            JLabel label = new JLabel();
            JButton button = new JButton("开始抽奖");
            final JTextField textField = new JTextField();
            title.setSize(500, 360);
            title.setLocation(200, 200);
            title.setLayout(new FlowLayout());
            textField.setPreferredSize(new Dimension(150, 40));
 
            button.addActionListener(new ActionListener() {
 
                public void actionPerformed(ActionEvent e) {
                    String[] num = new String[3];
                    for(int i=0;i<3;i++)
                        num[i] = String.valueOf(new Random().nextInt(10) + 1);
                    int m=0;
                    String text = textField.getText();
                    for(int j=0;j<3;j++)
                        if(text.equals(num[j]))
                            m++;
                    if(text.equals("")||text==null) {
                        JOptionPane.showMessageDialog(null, "输入错误");
                    }
                    else{
                        if (m == 0)
                        {JOptionPane.showMessageDialog(null, "获奖的号码为"+num[0]+num[1]+num[2]+"\n"+"所以您没有中奖");}
                        if (m == 1)
                        {JOptionPane.showMessageDialog(null, "获奖的号码为"+num[0]+num[1]+num[2]+"\n"+"所以您获得了三等奖");}
                        if (m == 2)
                        {JOptionPane.showMessageDialog(null, "获奖的号码为"+num[0]+num[1]+num[2]+"\n"+"所以您获得了二等奖");}
                        if (m == 3)
                        {JOptionPane.showMessageDialog(null, "获奖的号码为"+num[0]+num[1]+num[2]+"\n"+"所以您获得了一等奖");}
                    }
                }
            });
            title.add(label);
            title.add(textField);
            title.add(button);
            title.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            title.setVisible(true);
        }
    }