import java.util.Scanner;public class test { public static void main(String[] args){ Object matrix[][]; Scanner scanner = new Scanner(System.in); System.out.print("Nro. Columnas: "); int nroColumns =scanner.nextInt(); System.out.print("Nro. Filas : "); int nroRows =scanner.nextInt(); matrix = new Object[nroColumns][nroRows]; }}