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https://jira.terracotta.org/jira//browse/CDV-422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_23040
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Geir Ove Grønmo commented on CDV-422:
-------------------------------------
Making the inner class static *does* not help. The same error is still being
thrown.
> Problem With Subclass of HashSet
> --------------------------------
>
> Key: CDV-422
> URL: https://jira.terracotta.org/jira//browse/CDV-422
> Project: Community Development
> Issue Type: Bug
> Affects Versions: 2.4.3
> Reporter: Geir Ove Grønmo
> Assignee: Issue Review Board
>
> The following test class triggers a java.lang.IncompatibleClassChangeError
> like this:
> Exception in thread "main" java.lang.IncompatibleClassChangeError
> at
> tutorial.HelloWorldIncompatibleClassChangeError$MySet.<init>(HelloWorldIncompatibleClassChangeError.java:19)
> at
> tutorial.HelloWorldIncompatibleClassChangeError.sayHello(HelloWorldIncompatibleClassChangeError.java:35)
> at
> tutorial.HelloWorldIncompatibleClassChangeError.main(HelloWorldIncompatibleClassChangeError.java:47)
> - - -
> package tutorial;
> import java.util.List;
> import java.util.ArrayList;
> import java.util.Collection;
> import java.util.Set;
> import java.util.HashSet;
> import java.util.Iterator;
> public class HelloWorldIncompatibleClassChangeError {
> class MySet extends HashSet {
> protected String something;
>
> public MySet(String something, Collection c) {
> super(c.size());
> Iterator iter = c.iterator();
> while (iter.hasNext()) {
> super.add(iter.next());
> }
> this.something = something;
> }
> }
>
> private List hellos = new ArrayList();
> public void sayHello(){
> synchronized(hellos){
> Set abc = new HashSet();
> abc.add("A");
> abc.add("B");
> abc.add("C");
> hellos.add(abc);
> Set myset = new MySet("xxx", abc);
> myset.add("E");
> hellos.add(myset);
>
> for(Iterator it = hellos.iterator();it.hasNext();) {
> Object o = it.next();
> System.out.println(o);
> }
> }
> }
> public static void main(String[] args) {
> new HelloWorldIncompatibleClassChangeError().sayHello();
> }
> }
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