獲取指定範圍的不重複的隨機數

package com;

import java.util.*;

public class Test {
    public static void main(String[] args) {
        int[] intRet = new int[6];
        int intRd = 0; // 存放隨機數
        int count = 0; // 記錄生成的隨機數個數
        int flag = 0; // 是否已經生成過標誌
        while (count < 6) {
            Random rdm = new Random();
            intRd = Math.abs(rdm.nextInt()) % 32 + 1;
            for (int i = 0; i < count; i++) {
                if (intRet[i] == intRd) {
                    flag = 1;
                    break;
                } else {
                    flag = 0;
                }
            }
            if (flag == 0) {
                intRet[count] = intRd;
                count++;
            }
        }
        for (int t = 0; t < 6; t++) {
            System.out.println(t + "->" + intRet[t]);
        }
    }
}