How to declare a method returning generic class?

Question

I am new to java i have a set of classes which extends AbsEntity class.I have a abstract method which should return a Class object and that Class object should be E extends AbsEntity type...here is how i am trying to declare

abstract Class<E externds AbsEntity> E getAbsEntity();

This declaration through me error Actually i dont know hw to declare...A method whos return type should be Class type which is E extends AbsEntity Plz help

Example using Java generics http://stackoverflow.com/documentation/java/92/generics/5954/deciding-between-t-super-t-and-extends-t#t=2016122805233370177 — ravthiru, Dec 28 '16 at 05:26
http://stackoverflow.com/questions/450807/how-do-i-make-the-method-return-type-generic — , Dec 28 '16 at 05:26
I think you wanted something like `static E getAbsEntity(Class cls)` and then `cls.newInstance()` will give you an instance. — Elliott Frisch, Dec 28 '16 at 05:28

score 1 · Answer 1 · answered Dec 28 '16 at 05:26

1

Something like this:

public <E extends AbsEntity> E yourMethod() {
    //yourObject
    return yourObject;
}

answered Dec 28 '16 at 05:26

Pritam Banerjee

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anacron · Accepted Answer · 2016-12-28T05:34:16.220

0

It should be declared before the return type, like so:

    abstract <E extends AbsEntity> Class<E> getAbsEntity();

Take a Look here at Oracle docs.

Hope this helps!

edited Dec 28 '16 at 05:34

answered Dec 28 '16 at 05:24

anacron

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score 0 · Answer 3 · edited Dec 28 '16 at 06:21

0

You can use the following code:

static <E> E yourMethod(){
    AbsEntity absEntity = new AbsEntity();
    return (E)absEntity;
}

edited Dec 28 '16 at 06:21

Pang

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answered Dec 28 '16 at 06:12

flopcoder

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How to declare a method returning generic class?

3 Answers3