public class start{

public static void main(String[] args){
macierz P = new macierz( new int[][] { {3,5,1}, {6,2,1}, {7,1,1} } );
macierz D = new macierz( new int[][] { {1,2,8}, {2,5,0}, {6,1,5} } );
macierz W = new macierz( new int[][] { {0,0,0}, {0,0,0}, {0,0,0} } );

System.out.println(P.toString());
System.out.println(D.toString());
W=P.mnoz(D);
System.out.println(W.toString());
}

}

---