At The javadoc its dont work when i put it

Answer 1

Pls provide more details.
What exactly doesn't work?
Note that you can't generate html documents from the code playground if that is what you're trying to do. Otherwise, try to add an example.

Answer 2

As Tashi said, I get the feeling that you're trying to do it from Code Playground also. Post your code/link so we can get a better look at what you're trying to do.

Also, are you doing this from your personal IDE (Eclipse/NetBeans/IntelliJ/etc..) or from SoloLearn's?