Initialize elements of Two Dimension Array during declaration

TwoDimArrayDemo2.java

/**
 * Example: 2 - Two Dimension Array
 * To initialize elements of an array while declaration
 * */
public class TwoDimArrayDemo2 {
    public static void main(String[] args) {
        int[][] data = {{2,3,4},{10,20,30}, {7,8,9}};
        //length to get total number rows of array
        System.out.println("Number of rows: " + data.length);
        //length - number of columns in 0th row
        System.out.println("Number of columns in 0th row: " + data[0].length);
        System.out.println("Number of columns in 1st row: " + data[1].length);

        //To print all the elements like matrix
        for(int i=0;i<data.length;i++){
            System.out.println("");
            for(int j =0;j<data[i].length;j++){
                System.out.print(data[i][j]+ "\t");
            }
        }
    }
}

Sample Output

Number of rows: 3
Number of columns in 0th row: 3
Number of columns in 1st row: 3

2 3 4
10 20 30
7 8 9