上面return stones[0]错了，java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at line 23, Solution.lastStoneWeight at line 54, __DriverSolution__.__helper__ at line 84, __Driver__.main

非常抱歉，我犯了一个错误。在修正后的代码中，应该在返回之前先检查是否还有剩余的石头。如果没有剩余的石头，应该返回0。修改后的代码如下：

class Solution {
    public int lastStoneWeight(int[] stones) {
        while (stones.length > 1) {
            for (int i = 0; i < stones.length; i++) {
                for (int j = 1; j < stones.length; j++) {
                    if (stones[i] > stones[j]) {
                        int temp = stones[i];
                        stones[i] = stones[j];
                        stones[j] = temp;
                    }
                }
            }
            if (stones[stones.length - 1] <= stones[stones.length - 2]) {
                stones[stones.length - 2] -= stones[stones.length - 1];
                stones = Arrays.copyOf(stones, stones.length - 1);
            } else {
                stones = Arrays.copyOf(stones, stones.length - 2);
            }
        }
        if (stones.length == 0) {
            return 0;
        } else {
            return stones[0];
        }
    }
}

这样应该就可以避免之前的数组越界错误了。请尝试运行修正后的代码，如果还有其他问题，请随时告诉我。