What can be the error in this simple Linked List Implementation

Question

i have a linked list code that wont compile successfully. The code is
//Lets try the Linked List 
import java.util.*;
class LinkedListDemo {
public static void main ( String args[]){
     LinkedList l1=new LinkedList();
     l1.add( "A");
     l1.add(2);
     l1.add(3);
     l1.add(4);
     l1.add(5);
     l1.addFirst(6);
     l1.add(7);
     l1.add(8);
     l1.add(9);
     //Lets check what does the Linked List hold at this time
     System.out.println("Prsently the linked lis is having:  "+l1);
}Problem is with the add method . Compiler error is that it doesnt recognize the symbol ie add method.

Answer 1

i m sorry , java version is 1.4In that case, read up on the link jverd posted on AutoBoxing. You can only add Objects to a List. An int is a primitive, not an Object. You can try something like this:
l1.add(new Integer(2));