java - MedianCalc() 方法给我 IndexOutOfBounds 异常

Question

我有这个方法来获取中值，

public double getMedian(double[] numberList) {
        int factor = numberList.length;
        double[] first = new double[(int) factor / 2];
        double[] last = new double[first.length];
        double[] middleNumbers = new double[1];
        for (int i = 0; i < first.length; i++) {
            first[i] = numberList[i];
        }
        for (int i = numberList.length; i >= last.length; i--) {
            last[i] = numberList[i];
        }
        for (int i = 0; i <= numberList.length; i++) {
            if (numberList[i] != first[i] || numberList[i] != last[i])
                middleNumbers[i] = numberList[i];
        }
        if (numberList.length % 2 == 0) {
            double total = middleNumbers[0] + middleNumbers[1];
            return total / 2;
        } else {
            return middleNumbers[0];
        }
    }

但是给我一个IndexOutOfBounds异常。有人可以帮我解决这个错误吗？

Answer 1

您应该使用i < numberList.length ，不是i <= numberList.length;数组的合法索引是 [0, array.length-1] ，即array.length不是合法索引