import java.util.ArrayList;
public class ElementInserter {
    public static void main(String[] args) {
        ArrayList<Integer> arrayList = new ArrayList<Integer>();
        ArrayList<Integer> a = new ArrayList<Integer>();
        a.add(1);
        a.add(5);
        a.add(7);;
        a.add(2);
        a.add(11);
        for(int index=0; index < a.size(); index++) {
            arrayList.add(a.get(index));
        }
        System.out.println("Array Before Insertion:");
        for(int index=0; index < arrayList.size(); index++) {
            System.out.println(a.get(index));
        }
        System.out.println("Array After Insertion of 15 at position 3");
        arrayList.add(2,15);
        for(int index=0; index < arrayList.size(); index++) {
            System.out.println(arrayList.get(index));
        }
    }
}

Array before insertion:
1
5
4
7
9
6
Array after insertion of 15 at position 3:
1
5
4
15
7
9
6