Question

How to get matrix size in Java

Answer 1

public class MatrixSize {
    public static void main(String[] args) {
        int[][] matrix = {
            {2, 0, 5, 9},
            {0, 4, 0, 3},
            {0, 8, 0, 1}
        };

        // Get the number of rows
        int rows = matrix.length;

        // Get the number of columns 
        int columns = matrix[0].length;
        
        int total_cells = rows * columns;

        // Print the dimensions of the matrix
        System.out.println("Matrix size: " + rows + " rows x " + columns + " columns");
        
        System.out.println("Total Cells: " + total_cells);
    }
}



/*
run:

Matrix size: 3 rows x 4 columns
Total Cells: 12

*/

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