小编Raj*_*gam的帖子

我正在尝试使用以下代码生成10位唯一随机数.根据我的要求,我必须创建大约5000个唯一数字(ID).这没有按预期工作.它还会生成-ve数字.此外,有时生成的数字中缺少一个或两个数字,导致8或9个数字不是10.

public static synchronized  List generateRandomPin(){

    int START =1000000000;
    //int END = Integer.parseInt("9999999999");
    //long END = Integer.parseInt("9999999999");
    long END = 9999999999L;

    Random random = new Random();

    for (int idx = 1; idx <= 3000; ++idx){
        createRandomInteger(START, END, random);
    }

    return null;
}


private static void createRandomInteger(int aStart, long aEnd, Random aRandom){
    if ( aStart > aEnd ) {
      throw new IllegalArgumentException("Start cannot exceed End.");
    }
    //get the range, casting to long to avoid overflow problems
    long range = (long)aEnd - …