arrays - Method that returns the average of array of integers

Question

I am new to programming. This is my question:

1. Write a method that returns the average of the array of integers.
2. If the array is empty, method returns 0.

What I have done so far:

public double getAverage (int[] values) {

    int sum = 0;
    for(int i : values) sum += i;
    return ((double) sum)/values.length;
}

Any one help me with the 2nd part please?

Answer 1

在你做任何事情之前检查你的阵列。

if (yourArray.length == 0) {
    return 0;
}

Answer 2

您显然有除以零错误。

您可以使用 max 函数将最小值除以 1。

return ((double) sum)/Math.max(values.length,1);

Answer 3

if (values.length == 0) {
    return 0;
}

在计算平均值之前，使用此代码检查数组是否为空，因为如果元素数为零，那么您将得到除法为零异常

Answer 4

if (yourArray.isEmpty)
{
    return 0;
}