Special Edition Using Java 2 Standard Edition

Troubleshooting

Class Should Be Declared Abstract

The compiler reports that a class should be declared abstract because it does not implement a particular method.

A class that is declared to implement an interface must explicitly be declared as abstract if it does not implement every method defined by that interface and its super-interfaces. If you don't intend for the class to be abstract , examine the signature for the method named in the compiler error to determine why your implementation does not match. To correctly override an interface method, you must define a method with the exact same name and parameter list.

Invalid Method Implementation Because of a Thrown Exception

The compiler reports that a method in your class cannot implement ...