matrix array java code example

Example 1: Multidimensional array in java

// two dimensional string array in java example
public class TwoDimensionalStringArray 
{
   public static void main(String[] args) 
   {
      String[][] animals = {
              { "Lion", "Tiger", "Cheetah" },
              { "Deer", "Jackal", "Bear" },
              { "Hyena", "Fox", "Elephant" } };
      for(int a = 0; a < animals.length; a++) 
      {
         System.out.print(animals[a][0] + " ");
         for(int b = 1; b < animals[a].length; b++) 
         {
            System.out.print(animals[a][b] + " ");
         }
         System.out.println();
      }
   }
}

Example 2: java two dimensional arrays

int[][] multiples = new int[4][2];     // 2D integer array with 4 rows 
                                          and 2 columns
String[][] cities = new String[3][3];  // 2D String array with 3 rows 
                                          and 3 columns

Example 3: 2d array java

//Length
int[][]arr= new int [filas][columnas];
arr.length=filas;

        int[][] a = {
            {1, 2, 3}, 
            {4, 5, 6, 9}, 
            {7}, 
        };
      
        // calculate the length of each row
        System.out.println("Length of row 1: " + a[0].length);
        System.out.println("Length of row 2: " + a[1].length);
        System.out.println("Length of row 3: " + a[2].length);
    }