Extending a class using a generic parameter

Question

I need to get 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> {}

Thank!

+3

malat May 23 '11 at 10:26

2 answers

It must:

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

+1

Buhake sindi May 23 '11 at 10:29

Vivien barousse · Accepted Answer · 2011-05-23T10:28:55+0000

Compiler MySubTool as a way to learn that VIEWin MySubToola subclass MyView, you need to use it once again:

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