[Zad 2] Random Access File i inne

public static void Zad3(){
        String line;
        try{
            RandomAccessFile raf = new RandomAccessFile("C:\\Users\\TalarPC\\IdeaProjects\\Powturka\\baza.txt", "rw");
            raf.seek(0);
            System.out.println(raf.getFilePointer() + ", " + raf.length());
            while(raf.getFilePointer() < raf.length()){
                long fp = raf.getFilePointer();
                line = raf.readLine();
                long fp2 = raf.getFilePointer();
                System.out.println(raf.getFilePointer() + " - " + line);
                if(line.equals("cos")){
                    raf.seek(fp);
                    raf.writeUTF("XDXDXD");
                    raf.seek(fp2);
                }
            }

            //odczyt
            raf.seek(0);
            System.out.println(raf.getFilePointer() + ", " + raf.length());
            while(raf.getFilePointer() < raf.length()){
                System.out.println(raf.readLine());
            }
            raf.close();

            raf.close();
        }catch(Exception x) { System.out.print("Błont " + x); }
    }

    public static String Zad2(){
        String imie;
        String nazwisko;
        int wiek;
        Double pensja;
        String plec;
        String result = "";

        int min = Integer.MAX_VALUE;

        try{
            RandomAccessFile raf = new RandomAccessFile("C:\\Users\\TalarPC\\IdeaProjects\\Powturka\\baza.bin", "rw");
            //zapis
            raf.writeUTF("Adrian"); raf.writeUTF("Malina"); raf.writeDouble(2137); raf.writeInt(55); raf.writeUTF("Nieznana");
            raf.writeUTF("Martyna"); raf.writeUTF("Buc"); raf.writeDouble(200); raf.writeInt(13); raf.writeUTF("Kobieta");
            raf.writeUTF("Grażyna"); raf.writeUTF("Buc"); raf.writeDouble(3500); raf.writeInt(65); raf.writeUTF("Kobieta");

            raf.seek(0);
            System.out.println(raf.getFilePointer() + ", " + raf.length());
            while(raf.getFilePointer() < raf.length()){
                imie = raf.readUTF();
                nazwisko = raf.readUTF();
                long pt = raf.getFilePointer();
                pensja = raf.readDouble();
                wiek = raf.readInt();
                plec = raf.readUTF();
                long pt2 = raf.getFilePointer();

                if(wiek>50 && !plec.equals("Kobieta")){
                    pensja *= 1.10;
                    raf.seek(pt);
                    raf.writeDouble(pensja);
                }

                if(plec.equals("Kobieta")){
                    if(wiek<min){
                        min = wiek;
                        result = (imie + " " + nazwisko);
                    }
                }
                raf.seek(pt2);
            }

            //odczyt
            raf.seek(0);
            System.out.println(raf.getFilePointer() + ", " + raf.length());
            while(raf.getFilePointer() < raf.length()){
                System.out.print(raf.readUTF() + ", ");
                System.out.print(raf.readUTF() + ", ");
                System.out.print(raf.readDouble() + ", ");
                System.out.print(raf.readInt() + ", ");
                System.out.print(raf.readUTF() + ", \n");
            }
            raf.close();
        }catch(Exception x) { System.out.print("Błont " + x); }

        return result;
    }

    public static void zad1(){
        String x = "123";
        System.out.println("Parsowanie: " + Integer.parseInt(x));
        System.out.println("CharAt: " + x.charAt(0));
        System.out.println("ASCII: " + Character.getNumericValue(x.charAt(1)));
    }

    public static void plik() throws  FileNotFoundException{
        File plik = new File("C:\\Users\\TalarPC\\IdeaProjects\\Powturka\\baza.txt");
        Scanner in = new Scanner(plik);

        String linia;
        String [] pos;
        String [] imiona = new String[liczLinijki()];
        int i = 0;

        while(true){
            try{
                linia = in.nextLine();
                pos = linia.split("\\+");
                System.out.println(pos[0] + ", " + pos[1] + ", " + pos[2]);
                imiona[i] = pos[0];
                i++;
            }catch(NoSuchElementException e) { break; }
        }

        System.out.println("Tablica imion:");
        for(int j = 0; j < imiona.length; j++){
            System.out.println("Imie: " +imiona[j]);
        }
    }

    public static int liczLinijki() throws FileNotFoundException{
        File plik = new File("C:\\Users\\TalarPC\\IdeaProjects\\Powturka\\baza.txt");
        Scanner in = new Scanner(plik);

        String linia;
        int result = 0;

        while(true){
            try{
                linia = in.nextLine();
                result++;
            }catch(NoSuchElementException e) { break; }
        }
        return result;
    }