OnJava8-Examples/arrays/AssemblingMultidimensionalArrays.java

// arrays/AssemblingMultidimensionalArrays.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 multidimensional arrays
import java.util.*;

public class AssemblingMultidimensionalArrays {
  public static void main(String[] args) {
    Integer[][] a;
    a = new Integer[3][];
    for(int i = 0; i < a.length; i++) {
      a[i] = new Integer[3];
      for(int j = 0; j < a[i].length; j++)
        a[i][j] = i * j; // Autoboxing
    }
    System.out.println(Arrays.deepToString(a));
  }
}
/* Output:
[[0, 0, 0], [0, 1, 2], [0, 2, 4]]
*/