// generics/GenericArray.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

public class GenericArray<T> {
 private T[] array;
 @SuppressWarnings("unchecked")
 public GenericArray(int sz) {
 array = (T[])new Object[sz];
 }
 public void put(int index, T item) {
 array[index] = item;
 }
 public T get(int index) { return array[index]; }
 // Method that exposes the underlying representation:
 public T[] rep() { return array; }
 public static void main(String[] args) {
 GenericArray<Integer> gai = new GenericArray<>(10);
 try {
 Integer[] ia = gai.rep();
 } catch(ClassCastException e) {
 System.out.println(e.getMessage());
 }
 // This is OK:
 Object[] oa = gai.rep();
 }
}
/* Output:
[Ljava.lang.Object; cannot be cast to
[Ljava.lang.Integer;
*/