Java Coding Problems

Generics of methods

For example, let's get the generic return types for the slice() and asMap() methods. This can be accomplished via the Method.getGenericReturnType() method as follows:

Class<Melon> clazz = Melon.class;Method sliceMethod = clazz.getDeclaredMethod("slice");Method asMapMethod = clazz.getDeclaredMethod("asMap", List.class);Type sliceReturnType = sliceMethod.getGenericReturnType();Type asMapReturnType = asMapMethod.getGenericReturnType();

Now, calling printGenerics(sliceReturnType) will output the following:

Class of type argument: class modern.challenge.SliceSimple name of type argument: Slice

And, calling printGenerics(asMapReturnType) will output the following:

Class of type argument: class java.lang.StringSimple name of ...