Question

我写了一个Java程序，最后怎么得到不重复的

import java.util.Random;

public class Test2 {
static Random random = new Random();

public static void main(String[] args) {
int[] a = new int[10];
for (int i = 0; i < a.length; i++) {
a[i] =(f(60, 100, 3));
System.out.println(a[i]);
}

}

public static int f(int fromS, int toS, int modeNum) {
int n = 0;
boolean flag = true;
while (flag) {
n = random.nextInt(toS - fromS + 1) + fromS;// random.nextiInt=（结束-起始+1）+起始
if (n % 3 == 0) {
flag = false;
}
}
return n;
}

}

Answer 1

HashSet<Integer>  set = new HashSet<Integer>();  
              
            while(set.size()<10){  
                int randomNumber =(f(60, 100, 3));  
                set.add(randomNumber);  
            }  
            int[] a = new int[10];
            for(int j=0;j<set.size();j++){  
                a[j]=i;
                System.out.println(i);
            }

main方法改成上面这个