Description Volker Renneberg 2005-04-06 08:29:13 EDT

Hi!

This example covers two problems of Eclipse 3.1M6. The following code contains 
and internal class "MyInterfaceImpl" implementing the interface "MyInterface". 
If you leave out the necessary implementation of the method and ask Eclipse to 
generate a default implementation (as a solution for the error), the shown 
method will be generated:

       public <A extends Object & Data> void copyData(A data) {

although the signature should be

       public <A extends Data> void copyData(A data) {

Furthermore, the generated code does compile with Eclipse, Although it does 
not compile with the Javac compiler JDK 1.5 (update 2)
public class ExtendedGenericMethodSignature {
    public interface Data {
    }

    public interface MyInterface {
        public <A extends Data> void copyData(A data);
    }

    public class MyInterfaceImpl implements MyInterface {
        public <A extends Object & Data> void copyData(A data) {
        }
    }
}

Javac says:
ExtendedGenericMethodSignature.MyInterfaceImpl is not abstract and does not 
override abstract method <A>copyData(A) in 
ExtendedGenericMethodSignature.MyInterface.