How can I create an array of objects of a generic class?

Question

I builded a class to act like a queue. And I called it SalehQueue of Generic type. How can I create an array of that class?

  SalehQueue<String> department=new SalehQueue<String>();

Can I do this?

  SalehQueue[]<String> department=new SalehQueue[10]<String>();

Any idea??

possible duplicate of [Create a generic array in java](http://stackoverflow.com/questions/23141696/create-a-generic-array-in-java) — Radiodef, Apr 08 '15 at 18:24
Also http://stackoverflow.com/q/7810074/2891664 or http://stackoverflow.com/q/217065/2891664 — Radiodef, Apr 08 '15 at 18:28
possible duplicate of [How to create a generic array in Java?](http://stackoverflow.com/questions/529085/how-to-create-a-generic-array-in-java) — geekprogrammer, Apr 08 '15 at 18:30
See https://docs.oracle.com/javase/tutorial/java/generics/restrictions.html#createArrays — JB Nizet, Apr 08 '15 at 19:23

Marcos Vasconcelos · Answer 1 · 2015-04-08T19:22:13.940

0

Yes you can do that, instatiate an Array of objects.

If you cant create generic typed arrays, just omit the generic type on instantiation.

List<String>[] stringss = new ArrayList[10];

edited Apr 08 '15 at 19:22

answered Apr 08 '15 at 17:55

*"instatiate an Array of objects"* This doesn't make sense. Read the question again. – Radiodef Apr 08 '15 at 18:38
1

It does not work with me. I tried SalehQueue[] department=new SalehQueue[10](); And SalehQueue[] department=new SalehQueue[10]; Same problem. – Saleh Makkawy Apr 08 '15 at 18:39
I told instiate array of objects, because this is a ordinary object array. – Marcos Vasconcelos Apr 08 '15 at 19:21
Omit generic type after the new – Marcos Vasconcelos Apr 08 '15 at 19:23

score 0 · Answer 2 · answered Apr 09 '15 at 00:27

0

 ArrayList <SalehQueue<String>> department=  new ArrayList <SalehQueue<String>>();

This is the correct answer. Because Java does not support array in generic.

answered Apr 09 '15 at 00:27

Saleh Makkawy

score 0 · Answer 3 · answered Apr 09 '15 at 19:35

When using new to create an array, the component type must be a refillable type.

You can create the array using the raw type:

SalehQueue<String>[] department = new SalehQueue[10];

or the type parameterized by all wildcards:

SalehQueue<String>[] department = (SalehQueue<String>[])new SalehQueue<?>[10];

3 Answers3