Setting size of generic array in java? -

i have private member array of type generics , in constructor have parameter set size of array. how set private array size specified constructor parameter?

this have:

private t[] hashtable;  public hashtable(int initsize){     // set hashtable size here } 

this solution requires upcast object[].

public class hashtable<t> {     private t[] hashtable;      public hashtable(int initsize){ // set hashtable size here         hashtable = (t[]) new object[initsize];     } }