What's the difference between Object and "E"?

I'm trying to write an Iterator class for a LinkedList class that I wrote.
One of the methods is "public E next()"
I try to return an "E" but eclipse says "cannot convert from Object to E".
How do I fix this?

esekiel
Profile Answers by esekiel Questions by esekiel
Jul 13th, 2008
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Questions by esekiel

Core Java

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Showing Answers 1 - 8 of 8 Answers

srinivasa123
Profile Answers by srinivasa123

Jul 15th, 2008

change the method name as next1() it wil work.

ravikishore_gvr
Profile Answers by ravikishore_gvr

Jul 16th, 2008

Object is a class where as E is nothing but Generic Argument, While writing Generic Classes we will use type E.

shishir11485
Profile Answers by shishir11485

Aug 5th, 2008

Object having a reference of one variable store in stack whereas "E" is created in a heap don't have a reference variable

kabir soni
Profile Answers by kabir soni

Feb 6th, 2009

Object is a class and E is a generic type parameter . And Iterator class alwayes return Object so to fix this problem, you need to call it. For example

import java.util.ArrayList;
import java.util.Iterator;

class list {
   ArrayList list = new ArrayList();

   public E next() {
     Iterator i = list.iterator();
     return (E)i.next();
   }
}

public class TestProgram {

   public static void main(String[] args) {
     list list = new list();
     list.list.add("A");
     System.out.println(list.next());
   }

}