Java大乐透

import java.util.HashSet;
import java.util.Random;
import java.util.Set;

public class DaLeTou1 {
	public static void main(String[] args) {
		for (int i = 0; i < 5; i++) {
			show();
		}
	}

	private static void show() {
		Set set1 =new HashSet<>();     //前区集合
		
		Set set2 =new HashSet<>();    //后区集合
		//前区从1-35取五个
		while (set1.size()<5) {
			int a =new Random().nextInt(35)+1;
			set1.add(a);
		}
		System.out.println("前区为：");
		System.out.println(set1);
		//后区从1-12取两个n
		while (set2.size()<2) {
			int b=new Random().nextInt(12)+1;
			set2.add(b);
		}
		System.out.println("后区为：");
		System.out.println(set2);
	}
}