import java.text.DecimalFormat; import java.util.ArrayList; import java.util.Collections; import java.util.List; import java.util.Scanner; /** * @Description * @Author saq * @Date 2022/12/5 15:05 */ public class Lotto { public static void main(String[] args) { System.out.println("请输入需要几组:"); // 输入需要几组 scanner(); } public static void scanner() { // 输入几组 Scanner scanner = new Scanner(System.in); int groups = scanner.nextInt(); if (groups == 1 || groups == 2 || groups == 3 || groups == 4 || groups == 5) { for (int i = 1; i <= groups; i++) { System.out.print("第" + i + "组:"); lotto(); System.out.println(); } } else { System.out.println("输入的数据格式有误,重新输入!"); scanner(); } } public static void lotto() { DecimalFormat decimalFormat = new DecimalFormat("00"); // 保存前五位 List<Integer> list5 = new ArrayList<>(); // 前五位 while (true) { Integer front5 = (int) (Math.random() * 35); if (front5 > 0 && !list5.contains(front5)) { list5.add(front5); } if (list5.size() == 5) { break; } } // 前五位排序 Collections.sort(list5); // 保存后两位 List<Integer> list2 = new ArrayList<>(); // 后两位 while (true) { Integer after2 = (int) (Math.random() * 12); if (after2 > 0 && !list2.contains(after2)) { list2.add(after2); } if (list2.size() == 2) { break; } } // 后两位排序 Collections.sort(list2); list5.forEach(m1 -> System.out.print(decimalFormat.format(m1) + " ")); System.out.print(" + "); list2.forEach(m1 -> System.out.print(decimalFormat.format(m1) + " ")); } }
标签:大乐透,java,list5,System,list2,随机,groups,import From: https://www.cnblogs.com/sunAnqing/p/16954577.html