OnJava8-Examples/generics/ArrayMaker.java

// generics/ArrayMaker.java
// (c)2021 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.
import java.lang.reflect.*;
import java.util.*;

public class ArrayMaker<T> {
  private Class<T> kind;
  public ArrayMaker(Class<T> kind) { this.kind = kind; }
  @SuppressWarnings("unchecked")
  T[] create(int size) {
    return (T[])Array.newInstance(kind, size);
  }
  public static void main(String[] args) {
    ArrayMaker<String> stringMaker =
      new ArrayMaker<>(String.class);
    String[] stringArray = stringMaker.create(9);
    System.out.println(Arrays.toString(stringArray));
  }
}
/* Output:
[null, null, null, null, null, null, null, null, null]
*/