OnJava8-Examples/arrays/AutoboxingArrays.java

// arrays/AutoboxingArrays.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.util.*;

public class AutoboxingArrays {
  public static void main(String[] args) {
    Integer[][] a = { // Autoboxing:
      { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 },
      { 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 },
      { 51, 52, 53, 54, 55, 56, 57, 58, 59, 60 },
      { 71, 72, 73, 74, 75, 76, 77, 78, 79, 80 },
    };
    System.out.println(Arrays.deepToString(a));
  }
}
/* Output:
[[1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [21, 22, 23, 24, 25,
26, 27, 28, 29, 30], [51, 52, 53, 54, 55, 56, 57, 58,
59, 60], [71, 72, 73, 74, 75, 76, 77, 78, 79, 80]]
*/