try{
            List<String> lines = Files.readAllLines(Paths.get("C:\\Users\\Patryk\\Desktop\\Java - kurs\\udemy\\src\\pl\\patryk\\IO\\bmi.txt"), StandardCharsets.ISO_8859_1);

            for (String str : lines){
                String[] osoba = str.split("-");
                double waga = Double.parseDouble(osoba[2]);
                double wzrost = Double.parseDouble(osoba[3]);

                double bmi = waga/(wzrost*wzrost);
                bmi = Math.round(bmi);
                String bmiZa = Double.toString(bmi);

                if(bmi<18.5){
                    try{
                        FileWriter writer = new FileWriter("C:\\Users\\Patryk\\Desktop\\Java - kurs\\udemy\\src\\pl\\patryk\\IO\\wynik.txt", true);
                        writer.write(osoba[0]);
                        writer.write("\r\n");
                        writer.write(bmiZa);
                        writer.write("\r\n");
                        writer.close();
                    } catch (IOException e){
                        e.printStackTrace();
                    }

                }
                if(bmi>=25.0){
                    try{
                        FileWriter writer = new FileWriter("C:\\Users\\Patryk\\Desktop\\Java - kurs\\udemy\\src\\pl\\patryk\\IO\\wynik.txt", true);
                        writer.write(osoba[0]);
                        writer.write("\r\n");
                        writer.write(bmiZa);
                        writer.write("\r\n");
                        writer.close();
                    } catch (IOException e){
                        e.printStackTrace();
                    }


                }
            }
        } catch (IOException e){

        }