Get array upperbound : Multidimensional Arrays « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Multidimensional Arrays

public class Main {
  public static void main(String args[]) {
    String[][] data = new String[3][4];
    System.out.println("Dimension 1: " + data.length);
    System.out.println("Dimension 2: " + data[0].length);
  }
}
/*
Dimension 1: 3
Dimension 2: 4
*/