OnJava8-Examples/housekeeping/ArrayClassObj.java at master · xinan-w/OnJava8-Examples · GitHub

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// housekeeping/ArrayClassObj.java

// 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]