I was getting the following error in Eclipse IDE 3.1 and Java 1.5 (or 5.0 as some like to call it):

Name clash: The method removeEldestEntry(Map.Entry<K ,V>) of type LRUMap<K ,V> has the
same erasure as removeEldestEntry(Map.Entry<K , V>) of type LinkedHashMap<K , V> but does not
override it

The class in question looked like this:

class LRUMap <K , V> extends LinkedHashMap {
	public LRUMap(){
		super(10000, .75f, true);
	}

	protected boolean removeEldestEntry (Entry <K , V> eldest) {
		return this.size() > 262144;
	}
}

The problem is that I was extending LinkedHashMap without type parameters, not LinkedHashMap >K ,V<. Changing the code to:

class LRUMap <K , V> extends LinkedHashMap <K , V> {
	public LRUMap(){
		super(10000, .75f, true);
	}

	protected boolean removeEldestEntry (Entry <K , V> eldest) {
		return this.size() > 262144;
	}
}

completely fixed the problem! Type erasure is sure a pain, no? I should probably spend more time at home reading the Java Generics Tutorial.

This entry was posted on Sunday, December 24th, 2006 at 11:27 am and is tagged with eclipse ide, type parameters, java generics, time at home, boolean, blah, clash, lt, erasure, map. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback.

23 Responses to “Name clash: The method BLAH has the same erasure as type BLAH but does not override it”

1. Erica says:

   11/1/2011 at 1:06 am

   Thanks, I was wrestling with this issue for about an hour until I found this. =)

   Reply
2. Frank says:

   5/15/2011 at 11:15 pm

   Thank you.

   Reply
3. Marcelo Estrela says:

   1/7/2010 at 3:27 pm

   Thanks, I miss 2 hours in this problem. You save my day.

   Reply
4. Marauder says:

   7/22/2009 at 6:29 am

   Thanks, saved me some time

   Reply
5. Charlie says:

   6/5/2009 at 3:32 pm

   Thanks man, I couldn’t figure out what was going on for the life of me.

   Reply
6. alberto says:

   6/2/2009 at 5:31 am

   You saved my life. Thx

   Reply
7. James says:

   3/4/2009 at 9:32 am

   Thanks so much. That saved me a ton of time!

   Reply
8. aki says:

   12/19/2008 at 11:09 am

   Is it me or a variable name is missing after your parameter type (List) ???

   Reply
9. aki says:

   12/19/2008 at 11:09 am

   Same problem. 3 hours later, I found your post and that's it: You made my day!

   Reply
10. Zurch says:

    10/17/2008 at 8:28 am

    Thank you so much, this definitely saved me a lot of time.

    Reply
11. johnLasta says:

    7/26/2008 at 6:15 am

    THANK YOU!!!

    Reply
12. h0le says:

    4/2/2008 at 5:38 am

    Hi,

    Unfortunately, I still have a problem.

    I get the error if I try to override the following:

    abstract String method(List s);

    with:

    @Override
    public String method(List) {
    }

    

    Where is the error?

    Reply
13. Emily says:

    2/27/2008 at 11:11 am

    Thanks for posting this. It saved me tons of trouble!

    Reply
14. Julius says:

    11/17/2007 at 11:47 am

    FTW!

    Thanks for posting this.

    Reply
15. garth says:

    10/21/2007 at 9:53 pm

    

    Reply
16. Jake says:

    9/23/2007 at 5:51 pm

    Thank God

    Reply
17. DRJ says:

    9/18/2007 at 10:35 am

    You are my hero!! I spent way too long trying to figure this one out.

    Reply
18. rmn says:

    8/10/2007 at 12:10 pm

    thanks a bunch!

    Reply
19. KC says:

    4/11/2007 at 4:15 pm

    Like all the above..thanks!

    Reply
20. miss acacia says:

    4/5/2007 at 8:14 pm

    thank you you saved my life

    Reply
21. sammy says:

    3/26/2007 at 1:37 am

    Wow. i spend 30 minutes staring at 20 lines of code trying to figure it out before finally swallowing my pride and googling the problem. and this hit the nail on the head.

    Reply
22. mrh says:

    3/9/2007 at 10:44 am

    Karma & kudos, saved me time & pain as well.

    Reply
23. al_shopov says:

    3/8/2007 at 11:17 am

    Thanx for the post. Google + you saved me a lot of trouble.
    Generics are PITA

    Reply