generics - Java: Instantiating array object of type T using a factory -

i instantiate array of type t such:

items = new t[maxque]; 

here code far, believe non-reflective approach:

interface myfactory<t> {    t[] newobject(); }  public class queue< t extends comparable<t> > {     private int front;    private int rear;    private t[] items;    private int maxque;    private static final int max_items = 1000;     public queue(myfactory<t> factory) {       maxque = max_items + 1;       front = maxque - 1;       rear = maxque - 1;        items = factory.newobject();       items = new t[maxque];    } } 

the { items = factory.newobject(); } works , resolves compiler error not know how set size of array maxque using myfactory interface.

• how can declare array size of maxque?

on side note, while know definition of reflection in java, can please put and/or concept of factories in layman terms?

edit: found decent description of reflection here: what reflection , why useful?

i still bit unclear on when reflection should avoided , whether appropriate creating array.

you can create array of type t extends, may or may not suitable use extended type (comparable), or object:

public class queue<t extends comparable<t> > {      private int front;     private int rear;     private comparable[] items;     private int maxque;     private static final int max_items = 1000;      public queue() {         maxque = max_items + 1;         front = maxque - 1;         rear = maxque - 1;          items = new comparable[maxque];     } } 

when dequeuing or otherwise needing t, cast t

@suppresswarnings("unchecked") public t dequeue(){     return (t)items[0]; } 

both solutions of mine , immibis' covered here: https://stackoverflow.com/a/530289/360211