SubArray Max Sum

public class SubArrayMaxSum {

    public static void main(String[] args) {

        int[] a = { -2, -3, 4, -1, -2, 1, 5, -3 };
        System.out.println("Maximum contiguous sum is "
                + sum(a));
    }

    public static int sum(int arr[]){

       int sum1=Integer.MIN_VALUE,sum2=0,size=arr.length;

       for(int i=0;i<size;i++){
           sum2=sum2+arr[i];
           if(sum1<sum2){
               sum1=sum2;
           }
           if(sum2<0){
               sum2=0;
           }
       }
       return sum1;
    }
}