Matrix size Java

Question

I have a matrix for example 5x10.

double[][] matrix = new double[5][10]

I would like to know the size of these matrix, But if I do it:

matrix.length

It only return me columns size: 10

How could I do it?

Answer 1

matrix.length gives you the number of rows.

matrix[0].length gives you the number of columns (assuming all rows have the same length).