2d array length in java

1public class Main {
2  public static void main(String[] args) {
3    int[][] test = new int[10][4];
4    int rows = test.length;
5    int coloumns = test[0].length;
6    System.out.println(rows);
7    System.out.println(coloumns);
8  }
9}

1  int[][] test; 
2  test = new int[5][10];
3
4  int row = test.length;
5  int col = test[0].length;

1public static void main(String[] args) {
2
3    int[][] foo = new int[][] {
4        new int[] { 1, 2, 3 },
5        new int[] { 1, 2, 3, 4},
6    };
7
8    System.out.println(foo.length); //2 // gives count of rows
9    System.out.println(foo[0].length); //3 // gives count of columns for particular row
10    System.out.println(foo[1].length); //4
11}