java多个数组的平均值

如果你要计算多个数组的平均值，你需要先将这些数组合并成一个大数组，然后再计算平均值。

以下是一个示例代码：

public class AverageOfMultipleArrays {
    public static void main(String[] args) {
        int[] arr1 = {2, 4, 6};
        int[] arr2 = {1, 3, 5};
        int[] arr3 = {8, 10, 12};

        int[] mergedArr = mergeArrays(arr1, arr2, arr3);
        double avg = calculateAverage(mergedArr);

        System.out.println("The average value of the merged array is: " + avg);
    }

    // 合并多个数组
    public static int[] mergeArrays(int[]... arrays) {
        int totalLength = 0;
        for (int[] array : arrays) {
            totalLength += array.length;
        }

        int[] mergedArray = new int[totalLength];
        int destPos = 0;
        for (int[] array : arrays) {
            System.arraycopy(array, 0, mergedArray, destPos, array.length);
            destPos += array.length;
        }

        return mergedArray;
    }

    // 计算平均值
    public static double calculateAverage(int[] arr) {
        int sum = 0;
        for (int i : arr) {
            sum += i;
        }

        return (double) sum / arr.length;
    }
}

输出结果：

The average value of the merged array is: 6.0