package com.sf;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Scanner;

public class TestZhang {

    public static void main(String[] args) {
        String names = "zs,ls,ww,tom,jack,hall,tim,boy";
        String[] nameSplit = names.split(",");
        int[] arr = new int[nameSplit.length];

        for (int i = 0; i < arr.length; i++) {
            arr[i] = -1;
        }
        Scanner scanner = new Scanner(System.in);
        System.out.println("输入个数");
        int count = scanner.nextInt();
//        List list = new ArrayList();
        Random random = new Random();
        int times = 0;
        while (times < count) {
            int num = random.nextInt(nameSplit.length);
            if (arr[num] == -1) {
//                list.add(num);
                arr[num] = num;
                times++;
            }
        }

//
//        for (Object o : list) {
//            System.out.println(o);
//        }

    }
}