OnJava8-Examples/generics/GenericArrayWithTypeToken.java

// generics/GenericArrayWithTypeToken.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
import java.lang.reflect.*;

public class GenericArrayWithTypeToken<T> {
  private T[] array;
  @SuppressWarnings("unchecked")
  public GenericArrayWithTypeToken(Class<T> type, int sz) {
    array = (T[])Array.newInstance(type, sz);
  }
  public void put(int index, T item) {
    array[index] = item;
  }
  public T get(int index) { return array[index]; }
  // Expose the underlying representation:
  public T[] rep() { return array; }
  public static void main(String[] args) {
    GenericArrayWithTypeToken<Integer> gai =
      new GenericArrayWithTypeToken<>(
        Integer.class, 10);
    // This now works:
    Integer[] ia = gai.rep();
  }
}