随机数组成数组，要求元素不能重复

package com.random;

import java.util.Arrays;
import java.util.Random;

/*

• 生成5个不重复的随机数(1-10)，重复的话重新生成。
• 最终生成的5个随机数放到数组中，需要数组中的5个随机数不重复。
• /

public class RandomTest04 {

public static void main(String[] args) {
    Random r = new Random();
    int[] array01 = new int[5];
    for (int i = 0; i < array01.length; i++) {
        array01[i] = -1;
    }
    int i = 0;
    while (i < array01.length) {
        int num = r.nextInt(10);
        boolean index = true;
        for (int j = 0; j < i; j++) {
            if (array01[i] == array01[j]) {
                index = false;
            }
        }
        if (index) {
            array01[i] = num;
            i++;
        }

    }
    for (i = 0; i < array01.length; i++) {
        System.out.print(array01[i] + " ");
    }

}

}

给个实现方案，仅供参考：

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

public class App {
    public static void main(String[] args) {
        Random rand = new Random();
        Set<Integer> set = new HashSet<Integer>();
        int[] arr = new int[5];
        while(set.size()<5){
            set.clear();
            for(int i=0;i<5;i++){
                int num = rand.nextInt(10);
                set.add(num);
                arr[i] = num;
            }
        }
        for (int i=0;i<arr.length; i++) {
            System.out.print(arr[i] + " ");
        }
    }
}