ASD Apotek

public class Filkomedika {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String content = new String();
        LinkedList<String> list_a = new LinkedList<String>();
        LinkedList<String> list_b = new LinkedList<String>();

        while (in.hasNextLine()) {
            String perintah = in.next();
            if (perintah.equalsIgnoreCase("muat")) {
                Muat(in, content, list_a, list_b);
            }

            if (perintah.equalsIgnoreCase("cetak")) {
                Cetak(in, list_a, list_b);
            }

            if (perintah.equalsIgnoreCase("hapus")) {
                Hapus(in, list_a, list_b);
            }
        }
    }

    static void Muat(Scanner in, String content, LinkedList<String> list_a, LinkedList<String> list_b) {
        String apotek = in.next();
        String lokasi = in.next();
        if (apotek.equalsIgnoreCase("filkomedika_a") && lokasi.equalsIgnoreCase("d:obat_apotek_a.txt")) {
            File file = new File(lokasi);
            try {
                Scanner sc = new Scanner(new FileInputStream(file));
                while (sc.hasNextLine()) {
                    content = sc.nextLine();
                    list_a.add(content);
                }
                    System.out.println("Berhasil Memuat " + apotek);
            } catch (FileNotFoundException ex) {
            }
        }
        if (apotek.equalsIgnoreCase("filkomedika_b") && lokasi.equalsIgnoreCase("d:obat_apotek_b.txt")) {
            File file = new File(lokasi);
            try {
                Scanner sc = new Scanner(new FileInputStream(file));
                while (sc.hasNextLine()) {
                        content = sc.nextLine();
                        list_b.add(content);
                }
                        System.out.println("Berhasil Memuat " + list_b);
            } catch (FileNotFoundException ex) {
            }
        }
        else if(!apotek.equalsIgnoreCase("filkomedika_a") && !lokasi.equalsIgnoreCase("d:obat_apotek_a.txt")
                && !apotek.equalsIgnoreCase("filkomedika_b") && !lokasi.equalsIgnoreCase("d:obat_apotek_b.txt")) {
            System.out.println("Gagal Memuat " + apotek);
        }
    }

    static void Cetak(Scanner in, LinkedList<String> list_a, LinkedList<String> list_b) {
        String apotek = in.next();
        String lokasi = in.next();
        if (apotek.equalsIgnoreCase("filkomedika_a") && lokasi.equalsIgnoreCase("d:obat_apotek_a.txt")) {
            for(String s:list_a){
                System.out.println(s);
            }
        }
        if (apotek.equalsIgnoreCase("filkomedika_b") && lokasi.equalsIgnoreCase("d:obat_apotek_b.txt")) {
            for(String s:list_b){
                System.out.println(s);
            }
        }
    }

    static void Hapus(Scanner in, LinkedList<String> list_a, LinkedList<String> list_b) {
        String apotek = in.next();
        String namaObat = in.next();
        if (apotek.equalsIgnoreCase("filkomedika_a")) {
            list_a.remove(namaObat);
        }
        System.out.println(list_a);
    }
}