Program to find average of elements of an array in Java

// average of sum of array
public class SumAndAverage
{
   public static void main(String[] args)
   {
       int i,sum=0,avg=0;
       int a[]={10,20,30};
       for(i=0;i<a.length;i++)
       {
           sum+=a[i];
       }
       avg=sum/a.length;
       System.out.println("Average : "+avg);
   }
}

Output:
Average : 20