Java Programs Made Easy

Q)...Given two integer arrays. merge the common elements into a new array. find the sum of the elements
input1:{1,2,3,4}
input2:{3,4,5,6}
logic:{3,4}
output:7

1. package Set1;
2. import java.util.*;
3. public class ClassSet4 {
4.  public static int mergeArray(int a[],int b[]){
5.   List<Integer> l1=new ArrayList<Integer>();
6.   List<Integer> l2=new ArrayList<Integer>();
7.   int i,d=0;
8.   for(i=0;i<a.length;i++)
9.    l1.add(a[i]);
10.   for(i=0;i<b.length;i++)
11.    l2.add(b[i]);
12.   l1.retainAll(l2);
13.   for(i=0;i<l1.size();i++)
14.    d+=(Integer) l1.get(i);
15.   return d;
16.  }
17.  public static void main(String[] args) {
18.   int[] a={1,2,3,4};
19.   int[] b={3,4,5,6};
20.   System.out.println(mergeArray(a,b));
21.  }
22. }