Java NoSuchMethodError in enum

Question

I just added a method to an enum. Whenever I invoke that method I get a NoSuchMethodError:

public enum PHASE {
  PHASE1,
  PHASE2(false),
  PHASE3;

  private boolean present = true;

  PHASE() {
  }

  PHASE(boolean present) {
    this.present = present;
  }

  public boolean isPresent() {
    return this.present;
  }
}

public void foo(PHASE phase) {
  if (phase.isPresent()) {
...

Here phase.isPresent throws a NoSuchMethodError after clean/build. What am I missing?

--

UPDATE: Netbeans has two cache folders. One was empty, the other one was not. That is my bad, apparently I didn't put enough effort into the caching issue. Unfortunately I cannot downvote my own question...

code seems fine.is it possible for you to post the whole class? — Freak, Apr 04 '13 at 10:27
Sorry, I can't post the whole class because of confidentiality issues. — András Hummer, Apr 04 '13 at 10:38
NetBeans 7.2, but I'm getting more and more concerned each day to return to Eclipse despite the current corporate and team policy. — András Hummer, Apr 04 '13 at 10:41
@linski - presumably because the OP can't / won't provide enough information to allow other people to reproduce the problem. (But I can't speak for the people who downvoted ...) — Stephen C, Apr 04 '13 at 11:07
*"Sorry, I can't post the whole class because of confidentiality issues."* - That would not stop you creating an SSCCE with the confidential parts replaced with stubs, etcetera. — Stephen C, Apr 04 '13 at 11:09
Well, I thought what mattered was already shown (ie. an enum with a method inside a class). The rest of the container class in no way interacts with the wrapped enum. — András Hummer, Apr 04 '13 at 11:14
@DrH [SSCCE](http://sscce.org/) is a very useful practice, just linking in case you didn't know :) — linski, Apr 04 '13 at 13:05

score 4 · Answer 1 · answered Apr 04 '13 at 10:29

4

This is probably an issue between your compile-time classpath and you run-time classpath. Your classes/jars files at runtime are not the same that you used at compile time.

Clean and rebuild your project to be sure.

answered Apr 04 '13 at 10:29

TheEwook

11,037
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I already have, at least a dozen times. `if (phase.present)` works neither, in this case a `java.lang.NoSuchMethodError: MyClass$ERASE_PHASE.access$000(LMyClass$ERASE_PHASE;)Z` is thrown. – András Hummer Apr 04 '13 at 10:37
Thank you, I take a look at the compile and runtime classpath differences, whether any. – András Hummer Apr 04 '13 at 10:38
What if you try to use a different IDE. It might be an issue about your IDE. You can try to clear manually the generated classes and check the file generated (with a java decompiler you will be able to check the differences) – TheEwook Apr 04 '13 at 11:07
1

@TheEwook - I would use `javap` for that. – Stephen C Apr 04 '13 at 11:11

score 2 · Accepted Answer · edited May 23 '17 at 12:23

2

It is possible that this is Netbeans specific issue. Especially if you use "Compile on save option" and have a big project with a lot of dependencies. See here for details.

I had a very similar problem with such (maven-based) project almost on a daily basis, and found a solution using the above link. Better to say variations of solution. Try it like this:

disable compile on save
close the problematic project
close netbeans
clear cache
open netbeans and clean&build

please feedback.

edited May 23 '17 at 12:23

Community

1
1

answered Apr 04 '13 at 10:47

linski

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Thank you, I already have the ScanOnDemand plugin added as due to a known issue 7.2's background scan can fall into an infinite loop (already fixed in 7.2.1, I just haven't got the time to upgrade yet). This by default disables the compile on save feature, so after each modification I always run a full clean/build before starting the next debug session. The cache folder is empty (has been empty for weeks, which is also a bit odd). – András Hummer Apr 04 '13 at 10:55
yes, that's definetley odd. Whenever I looked at it, regardless of options, it always had something. Hm. Is it a maven project? – linski Apr 04 '13 at 10:58
No, plain old Java project checked out via SVN. – András Hummer Apr 04 '13 at 11:07
you might wanna try running the project via ant from command line, it should do less processing that way if I remeber correctly. If you find a solution please feedback. PS I moved to eclipse because it got to irritating after some time. Now I got irritated by it too, so I'm moving to IDEA :) – linski Apr 04 '13 at 11:17

Java NoSuchMethodError in enum

2 Answers2