Beautiful Thing!: JAVA >> Login for Conversion of Decimal

Welcome,
Now, we will study about LOGIN with JOptionPane
The illustration is
"We must SignUp if we not registered yet. After finish registeration, we must SignIn to can enter the Conversion."
The Steps are :

1. Open the 'Netbeans' , and maka the package. ex : praktek1.LoginKonversi

2. Make the Folder and make the Java File . Example the name is 'Sign.java'

3. Copy the script below :

package praktek1.LoginKonversi;
    import javax.swing.JOptionPane;
    import java.util.*;

public class Sign {
    public ArrayList nameArray = new ArrayList();
    public ArrayList genderArray = new ArrayList();
    public ArrayList passArray = new ArrayList();
    public int countSignIn;
    public int nameLength;
    public int genderLength;
    public int passLength;

public void mainMenu() {
        String[] menu = {"Sign Up", "Sign In", "Sign Out"};
        int pilihan = JOptionPane.showOptionDialog(null,
                "Welcome ! !" + "\nSignUp first to register" + "\nOr SignUp to enter to Conversion",
                "Main menu",
                JOptionPane.YES_NO_OPTION,
                JOptionPane.PLAIN_MESSAGE,
                null, menu, null);
        switch (pilihan) {
            case 0:
                signUp();
                break;
            case 1:
                signIn();
                break;
            case 2:
                System.exit(0);
                break;
            default:
                JOptionPane.showMessageDialog(null, "Sorry, if you want exit, you must click Sign Out button");
                mainMenu();
                break;
        }
    }

public void signUp() {
        Object nameSuit[] = nameArray.toArray();
        Object passSuit[] = passArray.toArray();
        String nama = inpNama();
        int i;
        for (i = 0; i < nameArray.size(); i++) {
            if (nameSuit[i].equals(nama)) {
                JOptionPane.showMessageDialog(null, "Sorry, user name has registered");
                signUp();
            }
        }
        if (i == nameArray.size()) {
            nameArray.add(nama);
        }
        genderArray.add(inpGender());
        int a = 0;
        while (a < 2) {
            String pass = inpPassword();
            if (!pass.matches(".{8,}")) {
                JOptionPane.showMessageDialog(null, "Sorry, max 8 characters");
            } else if (pass.matches(".{8,}")) {
                passArray.add(pass);
                mainMenu();
            } else if (a == 2) {
                a = 0;
            }
        }
    }

public String inpNama() {
        String nama = JOptionPane.showInputDialog("Please Enter Your Name : ");
        try {
            if (nama.isEmpty()) {
                JOptionPane.showMessageDialog(null, "Sorry, use name is empty");
                inpNama();
            } else if (!nama.matches("[a-z A-Z]+")) {
                JOptionPane.showMessageDialog(null, "Sorry, only the alphabetic");
                inpNama();
            }
        } catch (NullPointerException npe) {
            JOptionPane.showMessageDialog(null, "Sorry, Please enter your user name");
            inpNama();
        }
        return nama;
    }

public String inpGender() {
        String gender = "";
        String[] opGender = {"Man", "Woman"};
        int pilihan = JOptionPane.showOptionDialog(null,
                "Choose your gender, please !!",
                "Gender",
                JOptionPane.YES_NO_OPTION,
                JOptionPane.PLAIN_MESSAGE,
                null, opGender, null);
        switch (pilihan) {
            case 0:
                gender = "Mr. ";
                break;
            case 1:
                gender = "Mrs. ";
                break;
            default:
                JOptionPane.showMessageDialog(null, "Sorry, you must choose your gender ! ");
                inpGender();
                break;
        }
        return gender;
    }

public String inpPassword() {
        String password = JOptionPane.showInputDialog("Please enter your password !");
        try {
            if (password.isEmpty()) {
                JOptionPane.showMessageDialog(null, "Sorry Your Password is Empty");
                inpPassword();
            }
        } catch (NullPointerException npe) {
            JOptionPane.showMessageDialog(null, "Sorry you must enter your password");
            inpPassword();
        }
        return password;
    }

public void signIn() {
        Object nameSuit[] = nameArray.toArray();
        Object passSuit[] = passArray.toArray();
        Object genderSuit[] = genderArray.toArray();
        String nama = inpNama();
        String password = inpPassword();
        String kesalahan = "";
        String betul = "";
        int i;
        for (i = 0; i < nameArray.size(); i++) {
            if (nameSuit[i].equals(nama) && passSuit[i].equals(password)) {
                JOptionPane.showMessageDialog(null,
                        " Welcome " + genderSuit[i] + " " + nameSuit[i] + "");
                menuJOption();
            } else if (!nameSuit[i].equals(nama) && !passSuit[i].equals(password)) {
                kesalahan = "name and password";
                betul = "Right";
            } else {
                if (!passSuit[i].equals(password)) {
                    kesalahan = "password";
                    betul = "with your user name";
                }
                if (!nameSuit[i].equals(nama)) {
                    kesalahan = "user name";
                    betul = "with your password";
                }
            }
        }
        if (i == nameArray.size()) {
            JOptionPane.showMessageDialog(null, "Soory the user name is not matches" + betul + "\nTry Again, please");
            mainMenu();
        }
    }

public void menuJOption() {
        Konversi konv = new Konversi();
        String[] pilihan = {"BINER", "HEXA", "OKTAL", "TERBILANG", "PECAHAN", "KEMBALI"};
        while (true) {
            int response = JOptionPane.showOptionDialog(
                    null, "Welcome !!"
                    + "\nChoose Conversion at above?"// Pesan
                    , "Conversion" // Judul di Tittlebar
                    , JOptionPane.YES_NO_OPTION // Tipe Option
                    , JOptionPane.PLAIN_MESSAGE // Tipe Pesan
                    , null, pilihan, null // Default button
                    );
            switch (response) {
                case 0:
                    konv.setPilih("Biner");
                    konv.outHasilBiner();
                    break;
                case 1:
                    konv.setPilih("Hexadesimal");
                    konv.outHasilHexa();
                    break;
                case 2:
                    konv.setPilih("Oktal");
                    konv.outHasilOktal();
                    break;
                case 3:
                    konv.setPilih("Terbilang");
                    konv.outTerbilang();
                    break;
                case 4:
                    konv.setPilih("Pecahan");
                    konv.hasilPecahan();
                    break;
                case 5:
                    mainMenu();
                    break;
                default:
                    JOptionPane.showMessageDialog(null, "Sorry, if you want exit, you must click Sign Out button");
                    break;
            }
        }
    }
}

4. Then, make the Java File again to put the Conversion's Script. Example the name is 'Konversi.java'.

5. Copy the script below :

package praktek1.LoginKonversi;
import javax.swing.JOptionPane;

public class Konversi {
     private static String des;
    private String pilih;
    private static int validDes;
    private static long bilTerbilang;
    static String[] angka = {"", "Satu", "Dua", "Tiga", "Empat", "Lima", "Enam", "Tujuh", "Delapan", "Sembilan", "Sepuluh", "Sebelas"};
    static StringBuilder binerHasil = new StringBuilder();
    static StringBuilder hexaHasil = new StringBuilder();
    static StringBuilder oktalHasil = new StringBuilder();

public void setPilih(String pilih) {
        this.pilih = pilih;
    }

public static void keBiner(int n) {
        if (n > 1) {
            keBiner(n / 2);
        }
        System.out.print(n % 2);
        binerHasil.append(n % 2);
    }

public void keHexa(int n) {//int n : parameter
        char[] daftarHexa = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        int sisaBagi = n % 16;
        if (n > 0) {
            keHexa((n - sisaBagi) / 16);
            System.out.print(daftarHexa[n % 16]);
            hexaHasil.append(daftarHexa[n % 16]);
        }
    }

public void keOktal(int n) {
        int sisaBagi = n % 8;
        if (n > 0) {
            keOktal((n - sisaBagi) / 8);
            System.out.print(n % 8);
            oktalHasil.append(n % 8);
        }
    }

public void inputDesJOption(String pilih) {
        des = JOptionPane.showInputDialog("Enter Decimal : ");
        try {
            if (des.isEmpty()) {
                JOptionPane.showMessageDialog(null, "You must enter the decimal first");
                inputDesJOption(pilih);
            }
        } catch (NullPointerException npe) {
            JOptionPane.showMessageDialog(null, "Sorry, you must enter the decimal first");
            inputDesJOption(pilih);
        }
    }

public void outHasilBiner() {
        inputDesJOption(pilih);
        try {
            validDes = Integer.parseInt(des);
            System.out.print("\n The Decimal "+des+" in Biner is : ");
            keBiner(validDes);
            System.out.println("\n");
            JOptionPane.showMessageDialog(null, "The Decimal "+des+" in Biner is : "
                    + ""+binerHasil, "Kotak Hasil", JOptionPane.PLAIN_MESSAGE);
            binerHasil = new StringBuilder();
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(null, "'"+des+"'"
                    + " not number!"
                    + "\nPlease enter the number only");
            outHasilBiner();
        }
    }

public void outHasilHexa() {
        inputDesJOption(pilih);
        try {
            validDes = Integer.parseInt(des);
            System.out.print("\n The Decimal "+des+" in Hexa is : ");
            keHexa(validDes);
            System.out.println("\n");
            JOptionPane.showMessageDialog(null, "The Decimal "+des+" in Hexa is : "
                    + ""+hexaHasil, "Kotak Hasil", JOptionPane.PLAIN_MESSAGE);
            hexaHasil = new StringBuilder();
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(null, "'"+des+"'"
                    + " not number!"
                    + "\nPlease enter the number only");
            outHasilHexa();
        }
    }

public void outHasilOktal() {
        inputDesJOption(pilih);
        try {
            validDes = Integer.parseInt(des);
            System.out.print("\n The Decimal "+des+" in Octal is : ");
            keOktal(validDes);
            System.out.println("\n");
            JOptionPane.showMessageDialog(null, "The Decimal "+des+" in Octal is : "
                    + ""+oktalHasil, "Kotak Hasil", JOptionPane.PLAIN_MESSAGE);
            oktalHasil = new StringBuilder();
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(null, "'"+des+"'"
                    + " not number!"
                    + "\nPlease Enter the number only");
            outHasilOktal();
        }
    }
    
    private String sebut(int x) {
        String bilang = "";
        int y = x / 100;
        if (y > 0) {
            bilang = angka[y] + " ratus ";
            if (y == 1) {
                bilang = "seratus ";
            }
            x %= 100;
        }
        if (x < 12) {
            bilang += angka[x];
        } else {
            y = x / 10;
            x %= 10;
            if (y == 1) {
                bilang += angka[x] + " belas";
            } else {
                bilang += angka[y] + " puluh " + angka[x];
            }
        }
        return bilang;
    }

private String terbilang(long x) {
        int y;
        String bilang = "";
        String[] satuan = {"", " ribu ", " juta ", " milyar ", " trilyun ", " quadrilyun ", " quintilyun "};
        if (x > Math.pow(10, 20)) {
            return "maaf Bilangan terlalu besar";
        }
        for (int i = 6; i > 0; i--) {
            y = (int) (x / Math.pow(10, i * 3));
            if (y > 0) {
                if (y == 1 && i == 1) {
                    bilang += " seribu ";
                } else {
                    bilang += sebut(y) + satuan[i];
                }
            }
            x %= Math.pow(10, i * 3);
        }
        bilang += sebut((int) x);
        return bilang;
    }

public void outTerbilang() {
        inputDesJOption(pilih);
        try {
            bilTerbilang = Long.parseLong(des);
            JOptionPane.showMessageDialog(null, new Konversi().terbilang(bilTerbilang), "Terbilang", JOptionPane.INFORMATION_MESSAGE);
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(null, "'"+des+"'"
                    + " bukan angka!"
                    + "\nMohon isikan angka saja");
            outTerbilang();
        }
    }

public void hasilPecahan() {
        inputDesJOption(pilih);
        try {
            long desimal = Long.parseLong(des);
            long satu, dua, tiga, empat, lima, enam, tujuh, delapan, sembilan, sepuluh, sebelas, duabelas, tigabelas;
            //
            satu = desimal / 100000;
            desimal %= 100000;

dua = desimal / 50000;
            desimal %= 50000;

tiga = desimal / 20000;
            desimal %= 20000;

empat = desimal / 10000;
            desimal %= 10000;

lima = desimal / 5000;
            desimal %= 5000;

enam = desimal / 2000;
            desimal %= 2000;

tujuh = desimal / 1000;
            desimal %= 1000;

delapan = desimal / 500;
            desimal %= 500;

sembilan = desimal / 200;
            desimal %= 200;

sepuluh = desimal / 100;
            desimal %= 100;

sebelas = desimal / 50;
            desimal %= 50;

duabelas = desimal / 10;
            desimal %= 10;

tigabelas = desimal / 1;
            desimal %= 1;

JOptionPane.showMessageDialog(null, "Bilangan " + des + " dalam : "
                    + "Jumlah seratus ribuan = " + satu
                    + "\nJumlah lima puluh ribuan = " + dua
                    + "\nJumlah dua puluh ribuan = " + tiga
                    + "\nJumlah sepuluh ribuan = " + empat
                    + "\nJumlah lima ribuan = " + lima
                    + "\nJumlah dua ribuan = " + enam
                    + "\nJumlah seribuan = " + tujuh
                    + "\nJumlah lima ratusan = " + delapan
                    + "\nJumlah dua ratusan = " + sembilan
                    + "\nJumlah seratusan = " + sepuluh
                    + "\nJumlah lima puluhan = " + sebelas
                    + "\nJumlah lima satuan = " + duabelas
                    + "\nJumlah satuan = " + tigabelas, "Pecahan", JOptionPane.INFORMATION_MESSAGE);
        } catch (NumberFormatException nfe) {
            JOptionPane.showMessageDialog(null, "'"+des+"'"
                    + " bukan angka!"
                    + "\nMohon isikan angka saja");
            hasilPecahan();
        }
    }
}

6. After that, make the Java File again to call the main method. Example the name is 'Panggilan.java'

7. Copy the script below :

8. After that, try that program at Panggilan.java (Shift+F6)

That are the picture :

1. Menu Sign Up, Sign In , Sign Out