有人可以解释一下我的代码是什么意思吗？我正在编写一个程序，将用户输入传递到数组中，然后计算数组的平均值

问：

家庭作业如下：

 Write two overloaded methods that return the average of an array with the following headers:

  **public static int average(int\[\] array)**

  **public static double average(double\[\] array)**

 Write a test program that prompts the user to enter ten double values, invokes this method, and displays the average value.

我已经写了我的代码，我认为它有效，但我对家庭作业本身的某些方面和代码的某些方面有点困惑。虽然我写了两种方法，但我相信只使用了 double 方法。这是正确的，还是我误解了作业？

我也不真正理解我的代码的某些部分。我摆弄着一些东西，直到我能够让它工作，但我不知道为什么有些部分会以这种方式工作。

这是我的代码：

import java.util.Scanner; //Scanner is used to allow user input

class AvgArray {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        double[] userInput = new double[10];// creates an array called userInput with 10 doubles in that array

        System.out.printf("Please input 10 numbers: ");
        for (int i = 0; i < 10; i++) {
            userInput[i] = input.nextDouble();// the next input will be added to the userInput array in location i
        }

        average(userInput); // calls the method average and passes the userInput array to that method

        input.close(); // close input to prevent resource leak
    }

    public static int average(int[] userInput)
    // userInput is necessary at end to make it accessible for the following
    // statements (Is this correct? The assignment said the header should include
    // "array)", but I'm not sure whether this is something I'm supposed to fill in
    // with my array name or something I should have left alone.)
    {
        int sum = 0;
        // necessary so sum can be used in following for statement, not sure why I
        // couldn't initialize below with int sum = userInput[]i + sum;

        for (int i = 0; i < 10; i++) {
            sum = userInput[i] + sum;
        }
        int average = sum / 10;

        System.out.printf("%nThe average of your values is %d.%n%n", average);
        return average; // necessary but not sure why
    }

    public static double average(double[] userInput)
    // userInput is necessary at end to make it accessible for the following
    // statements (Is this correct? The assignment said the header should include
    // "array)", but I'm not sure whether this is something I'm supposed to fill in
    // with my array name or something I should have left alone.)
    {
        double sum = 0;
        // necessary so sum can be used in following for statement, not sure why I
        // couldn't initialize below with double sum = userInput[]i + sum;

        for (int i = 0; i < 10; i++) {
            sum = userInput[i] + sum;
        }
        double average = sum / 10;

        System.out.printf("%nThe average of your values is %.2f.%n%n", average);
        return average; // necessary but not sure why
    }

}

我相信一切都在工作，因为我在程序运行时得到了正确的值，但我觉得我不明白我做了什么以及为什么。我问过我的教授，但他需要大约一周的时间才能回复（如果他有的话）。感谢您的帮助！