编辑代码

class Main {
	public static void main(String[] args) {
		System.out.println("Hello JSRUN!   \n\n         - from JAVA .");
	}

    private int[] origin,  res;
    public Main(int[] nums) {
        this.origin = nums;
        this.res = new int[nums.length];
        for(int i = 0; i < nums.length; i++){
            res[i] = nums[i];
        }
    }

    public int[] reset() {
        for(int i = 0; i < origin.length; i++){
            res[i] = origin[i];
        }
        return res;
    }
    
    /** Returns a random shuffling of the array. */
    public int[] shuffle() {
        List<Integer> list = new ArrayList<>();
        for(int i : origin){
            list.add(i);
        }

        for(int i = 0; i < res.length; i++){
            int index = (int)(Math.random()*list.size());
            res[i] = list.remove(inde);
        }
        return res;
    }
}