Re: enum paralellism

On 1/16/12 6:16 AM, Roedy Green wrote:


Enums can implement interfaces:

public enum MyEnum implements Runnable {
    A { public void run() { System.out.println("A Runs!"); } },
    B { public void run() { System.out.println("B is an also ran."); } }
    ;
}

But they can not extend other classes. Enum *constants* however
automatically extend the (automatically abstract) Enum class. So you can
have abstract methods in the base enum class.

public enum MyEnum {
    A { public void run() { System.out.println("A Runs!"); } },
    B { public void run() { System.out.println("B is an also ran."); } }
    ;

    public abstract void run();
}

It sounds like you want a combination of abstract methods and interfaces.