Nauka Javy

import java.io.*;
public class Main
{
 public static void main(String[] args)
 throws IOException
 {
 float x, y, suma, roznica,iloczyn, iloraz;
 BufferedReader br = new BufferedReader(new
 ´InputStreamReader(System.in));
 System.out.println("Program oblicza sumę, różnicę, iloczyn
 ´i iloraz ");
 System.out.println("dla dwóch liczb x i y wprowadzonych
 ´z klawiatury.");
 System.out.println("Podaj x.");
 x = Float.parseFloat(br.readLine());
 System.out.println("Podaj y.");
 y = Float.parseFloat(br.readLine());
 suma = x+y;
 roznica = x-y;
 iloczyn = x*y;
 iloraz = x/y;
 System.out.printf("Dla liczb x = " + "%2.2f",x);
 System.out.printf(" i y = " + "%2.2f",y);
 System.out.println(); // wyświetlenie pustej linii
 System.out.printf("suma = " + "%2.2f,\n", + suma);
 System.out.printf("różnica = " + "%2.2f,\n", + roznica);
 System.out.printf("iloczyn = " + "%2.2f,\n", + iloczyn);
 System.out.printf("iloraz = " + "%2.2f.\n", + iloraz);
 }
}