Okay I am using the example framework in the:

Guidelines for Game developers Using MIDP Devices version 2 feb 2003

When I attempt to modify specific classes to sue extends Canvas instead of FullCanvas because I don't need ful screen access I get this error:

This class must implement the inherited abstract method Displayable.paint(Graphics), but cannot override it since it is not visible from GameCanvas. Either make the type abstract or make the inherited method visible.

Any clues of what I am missing?