Computer scienceProgramming languagesJavaCode organizationGeneric programmingGenerics essentials

Type Bounds

Enums

Report a typo

Enum class in Java standard library is declared as follows:

public abstract class Enum<E extends Enum<E>> implements Comparable<E>

Here's a less complicated version:

public abstract class Enum<E> implements Comparable<E>

Why would this change be a bad idea?

Select one option from the list

It will allow comparison of enums with objects of arbitrary classes (e.g. Object)

The lack of 'extends' keyword effectively prevents abstract Enum class from being extended / implemented

This is a good idea! Just got rid of unnecessary complexity Java developers are crazy about

It will allow comparison of enums of different types which is meaningless

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