OnJava8-Examples/housekeeping/ArrayClassObj.java

// housekeeping/ArrayClassObj.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.
// Creating an array of nonprimitive objects
import java.util.*;

public class ArrayClassObj {
  public static void main(String[] args) {
    Random rand = new Random(47);
    Integer[] a = new Integer[rand.nextInt(20)];
    System.out.println("length of a = " + a.length);
    for(int i = 0; i < a.length; i++)
      a[i] = rand.nextInt(500); // Autoboxing
    System.out.println(Arrays.toString(a));
  }
}
/* Output:
length of a = 18
[55, 193, 361, 461, 429, 368, 200, 22, 207, 288, 128,
51, 89, 309, 278, 498, 361, 20]
*/