生成不同的随机正整数

public static void main(String[] args){

int[] arr = new int[10];

for(int i=0; i<10; i++){
arr[i] = i + 1;
}

Random random = new Random();

int size = arr.length;

for(int k=0; k<size; k++){
int index = 0;

if((size - 1)-k != 0){
index = random.nextInt((size - 1)-k);
}

int temp = arr[index];

arr[index] = arr[size - (k + 1)];

arr[size - (k + 1)] = temp;

System.out.println("temp = " + temp);
}
}