Extending class with generic parameter

Question

I need to derive from the following class:

public abstract class MyTool<VIEW extends MyView>
  implements LookupListener, MouseListener, MouseMotionListener, KeyListener {}

The following does not work:

public abstract class MySubTool<VIEW> extends MyTool<VIEW> {}

Thanks !

Answer 1

The compiler in MySubTool as no way of knowing that VIEW in MySubTool is a subclass of MyView, you have to specify it again:

public abstract class MySubTool<VIEW extends MyView> extends MyTool<VIEW> {}

Answer 2

This should:

public abstract class MySubTool<VIEW extends MyView> extends MyTool<VIEW> {}