Java Tutorial: Multidimensional Arrays in Java

• Multidimensional Arrays are an Array of Arrays. Each elements of an M-D array is an array itself. Marks in the previous example was a 1-D array.

Multidimensional 2-D Array

• A 2-D array can be created as follows:

  int [][] flats = new int[2][3]          //A 2-D array of 2 rows + 3 columns
  

• We can add elements to this array as follows

  flats[0][0] = 100
  flats[0][1] = 101
  flats[0][2] = 102
  // … & so on!
  

• This 2-D array can be visualized as follows:

• Similarly, a 3-D array can be created as follows:

  String[][][] arr = new String [2][3][4]
  

Code as Described in the Video

package com.company;

public class cwh_28_multi_dim_arrays {
    public static void main(String[] args) {
        int [] marks; // A 1-D Array
        int [][] flats; // A 2-D Array
        flats = new int [2][3];
        flats[0][0] = 101;
        flats[0][1] = 102;
        flats[0][2] = 103;
        flats[1][0] = 201;
        flats[1][1] = 202;
        flats[1][2] = 203;

        // Displaying the 2-D Array (for loop)
        System.out.println("Printing a 2-D array using for loop");
        for(int i=0;i<flats.length;i++){
            for(int j=0;j<flats[i].length;j++) {
                System.out.print(flats[i][j]);
                System.out.print(" ");
            }
            System.out.println("");
        }

    }
}

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