Any SDK function in Java to Push number unto a Stack and calculate the average?
<p>I tried to Google for an answer but I think I am using wrong keywords. What I am trying to  do is - I have a collection of numbers (ints), and as I add new numbers I am computing the new average. I noticed that as my array grows, once I get to a certain count of elements (lets say 200), the calculation time becomes noticeable. I was wondering if there are any built-in SDK functions I can utilize to speed up my codes performance? I will be running the code on Android.</p>

<pre><code>int[] numbers = new int[3];

private int average(int number){
    //some buildin operation to push in array an int?
    for(int i=0; i &lt; numbers.length -1 ; i++){
        numbers[i]=numbers[i+1];
    }
    numbers[numbers.length -1] = number;
                    ;                
    //numbers[0] = numbers[1];
    //numbers[1] = numbers[2];
    //numbers[2] = number;

    int sum = 0;

    //any operation to get average?
    for(int i=0; i &lt; numbers.length ; i++)
        sum = sum + numbers[i];

    //calculate average value
    double average = sum / numbers.length;

    return (int)average;
 }
</code></pre>
