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javacomparable

No interface word before interface Comparable

It is detail, but I want to know why this happens.

Exemplary code:

Class klasa = Enum.class;
for(Type t : klasa.getGenericInterfaces())
   System.out.println(t);

Output o the program:

java.lang.Comparable<E>
interface java.io.Serializable

Why on the output there is no interface word before java.lang.Comparable<E>. It is interface, yes?

In my opinion output should be:

**interface** java.lang.Comparable<E>
interface java.io.Serializable

Comparable is specially treated?

Solution

  • What happens is that you get two different subclasses of java.lang.reflect.Type; one that is a generic type (probably j.l.r.ParameterizedType), and one that is a specific (non-generic) interface type (a j.l.Class<?>).

    What do you want to do with that information, and why?