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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