Кухня(); Задание N36.

public static int[] trimZero(int[] arr) {
        int indexWithoutZero = 0;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] != 0) {
                arr[indexWithoutZero] = arr[i];
                indexWithoutZero++;
            }
        }
        return Arrays.copyOf(arr, indexWithoutZero);
    }

public static int[] removeZorroValues(int[] arr)
{
    int i = 0;
    int j = 0;
    while( j < arr.length )
    {
        if ( arr[j] != 0 )
            arr[i++] = arr[j];
        j++;
    }
    return Arrays.copyOf( arr , i );
}