print mid element of sum of left & right in array

 array of numbers were given to find a number which has same sum of numbers in it’s either side.
I/p 1, 2, 3, 7, 6
O/p 7(has 1+ 2+3 in left 6 in right)

public class NewClass31 {
    void side(int ar[])
    {   
          int c=1,sum1;

        for(int i=0;i<ar.length-2;i++)
        {   
                 sum1=0;
            for(int j=0;j<ar.length;j++)
            {
                if(j<c)
                sum1+=ar[j];
                 if(j>c)
                  sum1-=ar[j];
            }
            if(sum1==0)
                System.out.println(ar[c]);
            c++;
        }
    }
    public static void main(String args[])
    {
        int ar[]={-2, 9, -9, 8, -1};
        NewClass31 ob=new NewClass31();
        ob.side(ar);
    }
}