基於Java實現的大樂透號碼生成器工具類

package com.xiaoxuzhu;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
/**
 * Description: 大樂透
 *
 * @author xiaoxuzhu
 * @version 1.0
 *
 * <pre>
 * 修改記錄:
 * 修改後版本	        修改人		修改日期			修改內容
 * 2022/4/30.1	    xiaoxuzhu		2022/4/30		    Create
 * </pre>
 * @date 2022/4/30
 */

public class SuperFun extends JFrame {

    /**
     *
     */
    private static final long serialVersionUID = 6787592245621788484L;
    private JPanel contentPane;
    private JTextField textField;
    private JTextArea textArea;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        try {
            UIManager
                    .setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
        } catch (Throwable e) {
            e.printStackTrace();
        }
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    SuperFun frame = new SuperFun();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public SuperFun() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);
        setTitle("大樂透號碼生成器");

        JPanel panel = new JPanel();
        contentPane.add(panel, BorderLayout.NORTH);
        panel.setLayout(new GridLayout(1, 2, 5, 5));

        JLabel label = new JLabel("請輸入號碼組數：");
        label.setFont(new Font("微軟雅黑", Font.PLAIN, 18));
        label.setHorizontalAlignment(SwingConstants.CENTER);
        panel.add(label);

        textField = new JTextField();
        textField.setFont(new Font("微軟雅黑", Font.PLAIN, 18));
        panel.add(textField);
        textField.setColumns(10);

        JPanel buttonPanel = new JPanel();
        contentPane.add(buttonPanel, BorderLayout.SOUTH);

        JButton button = new JButton("生成號碼");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int times = Integer.parseInt(textField.getText());// 獲得用戶輸入的需要生成的中獎號碼個數
                // 省略提示購買數量太多的代碼
                StringBuilder sb = new StringBuilder();// 創建字符串生成器對象
                for (int i = 0; i < times; i++) {
                    List<String> startList = getStartNumber();// 獲得前段號碼的集合
                    List<String> endList = getEndNumber();// 獲得後段號碼的集合
                    for (int m = 0; m < startList.size(); m++) {
                        sb.append(startList.get(m));// 在字符串生成器中添加前段號碼
                    }
                    sb.append("    ");
                    for (int n = 0; n < endList.size(); n++) {
                        sb.append(endList.get(n));// 在字符串生成器中添加後段號碼
                    }
                    sb.append("\n");
                }
                textArea.setText(sb.toString());// 在文本域中顯示號碼
            }
        });
        button.setFont(new Font("微軟雅黑", Font.PLAIN, 18));
        buttonPanel.add(button);

        JScrollPane scrollPane = new JScrollPane();
        contentPane.add(scrollPane, BorderLayout.CENTER);

        textArea = new JTextArea();
        textArea.setFont(new Font("微軟雅黑", Font.PLAIN, 18));
        scrollPane.setViewportView(textArea);
    }

    /**
     * 隨機生成前段5個號碼的方法
     *
     * @return
     */
    public List<String> getStartNumber() {
        List<String> list = new ArrayList<String>(); // 創建前段號碼集合
        String luckyNumber = "";
        for (int i = 1; i < 36; i++) { // 初始化前段號碼集合
            if (i < 10) {
                list.add("0" + i + "  ");// 添加0~9的號碼
            } else {
                list.add("" + i + "  ");// 添加大於9的號碼
            }
        }
        int roundIndex = 0;
        List<String> luckylist = new ArrayList<String>(); // 保存前段號碼的List集合
        for (int j = 0; j < 5; j++) {
            int amount = list.size(); // 獲取前段號碼的個數
            Random r = new Random(); // 創建並實例化Random的對象
            roundIndex = r.nextInt(amount); // 獲取一個0到amount-1的隨機數
            luckyNumber = list.get(roundIndex); // 獲取幸運數字
            luckylist.add(luckyNumber); // 添加luckylist中
            list.remove(roundIndex); // 移除剛剛產生的號碼
        }
        Collections.sort(luckylist); // 對前段號碼進行排序
        return luckylist;
    }

    /**
     * 隨機生成後段2個號碼的方法
     *
     * @return
     */
    public List<String> getEndNumber() {
        List<String> list = new ArrayList<String>(); // 創建後段號碼集合
        String luckyNumber = "";
        for (int i = 1; i < 13; i++) { // 初始化後段號碼集合
            if (i < 10) {
                list.add("0" + i + "  ");// 添加0~9的號碼
            } else {
                list.add("" + i + "  ");// 添加大於9的號碼
            }
        }
        int roundIndex = 0;
        List<String> luckylist = new ArrayList<String>(); // 保存後段號碼的List集合
        for (int j = 0; j < 2; j++) {
            int amount = list.size(); // 獲取後段號碼的個數
            Random r = new Random(); // 創建並實例化Random的對象
            roundIndex = r.nextInt(amount); // 獲取一個0到amount-1的隨機數
            luckyNumber = list.get(roundIndex); // 獲取幸運數字
            luckylist.add(luckyNumber); // 添加luckylist中
            list.remove(roundIndex); // 移除剛剛產生的號碼
        }
        Collections.sort(luckylist); // 對後段號碼進行排序
        return luckylist;
    }
}