Description marc downie 2005-10-05 16:24:53 EDT

The following code compiles just fine in javac and eclipse:

---Bug.java

public class Bug {
	
	public interface AClass<X extends AClass, Y extends AClass>
	{

		public interface BClass<T extends BClass, U extends BClass> extends AClass<T, U>
		{
		}
	}

	
	public class CClass<T extends AClass.BClass<T,T>> 
	{
		
	}

}

however, separating out the AClass into a separate file:

---AClass.java
public interface AClass<X extends AClass>
{
	public interface BClass<T extends BClass> extends AClass<T>
	{
	}
}

---Bug.java
public class Bug
{
	public class CClass<T extends AClass.BClass<T>>
	{
		
	}
}

gives an error in Bug.java (a red underline on the 'T') saying: "Bound mismatch: The type T is not a valid 
substitute for the bounded parameter <T extends AClass.BClass> of the type AClass<X>.BClass<T>". 
The "<X>" in "AClass<X>.BClass<T>" here looks a little suspect.

"public class CClass<T extends AClass<T>>" works in both eclipse and javac as you'd expect, as does 
"public class CClass<T extends BClass<T>>" if BClass is moved to a new file. Static importing BClass 
out of an AClass, however, doesn't change eclipse's failure. 

Javac compiles all cases without comment.