Java two-dimensional array example

A Java 2d array example.

package com.mkyong;

public class ArrayExample {

    public static void main(String[] args) {

        int[][] num2d = new int[2][3];

        num2d[0][0] = 1;
        num2d[0][1] = 2;
        num2d[0][2] = 3;

        num2d[1][0] = 10;
        num2d[1][1] = 20;
        num2d[1][2] = 30;

        //or init 2d array like this :
        int[][] num2dInit = {
                {1, 2, 3},
                {10, 20, 30}
        };

        print2dArray(num2d);

    }

    static void print2dArray(int[][] num2d) {
        // Accessing 2d array with index print
        int index1d, index2d = 0;

        for (int[] num1d : num2d) {
            index1d = 0;
            for (int num : num1d) {
                System.out.println("[" + index2d + "][" + index1d + "] = " + num);
                index1d++;
            }
            index2d++;
        }
    }
}

Output

[0][0] = 1
[0][1] = 2
[0][2] = 3
[1][0] = 10
[1][1] = 20
[1][2] = 30

References

• Oracle Arrays tutorials
• Java – How to declare and initialize an Array