java 产生一组不重复随机数

Posted 2021-05-07

public void randomKN(int n,int k){
    int [] x =  new int[n];
    for(int i = 0 ;  i < n; i++) x[i]=i;
    for(int i = 0 ;  i < k; i++){
        Random random = new Random();
        int t = random.nextInt(n-i)+i;
        swap(x,t,i);
        System.out.println(x[i]);
    }
}