java6

ARR数组：

public class Arr {
    public static void main(String[] args) {

        int[] arr = {1,2,3,4};

        int sum = 0;

        for (int i = 0; i < arr.length; i++) {

            System.out.println(arr[i]);

            sum = sum + arr[i];

        }
        System.out.println(sum);


    }