how to initialize two dimensional array in java code example

Example 1: How to create a 2d array in java

int[][] arr = new int[m][n];

Example 2: declare matrix in java

int[][] multi = new int[5][];
multi[0] = new int[10];
multi[1] = new int[10];
multi[2] = new int[10];
multi[3] = new int[10];
multi[4] = new int[10];

Example 3: Java 2d array initialization

class TwoDimensionalArray {

    public static void main(String[] args) {
        String[][] salutation = {
            {"Mr. ", "Mrs. ", "Ms. "},
            {"Kumar"}
        };

        // Mr. Kumar
        System.out.println(salutation[0][0] + salutation[1][0]);

        // Mrs. Kumar
        System.out.println(salutation[0][1] + salutation[1][0]);
    }
}

The output from this program is:

Mr. Kumar
Mrs. Kumar

Example 4: how to initialize one dimensional array in java

int[] a; // valid declaration
int b[]; // valid declaration 
int[] c; // valid declaration