SWING LOGIN FORM DI JAVA

Membuat form login java menggunakan class swing NetBeans IDE dan menggunakan database mysql serta koneksi kedatabasenya menggunakan jdbc.Buatlah project baru di netbeans ide, project java > java aplications dan beri nama "aplikasilogin.java", jika sudah selesai lanjut kita akan membuat sebuah database menggunakan mysql.

MEMBUAT DATABASE LOGIN SEDERHANA

Pada netbeans ide, jendela services pilih database > dan klik kanan MYSQL Servers > create new database, buatlah nama database kamu "aplikasilogin" dan ok. selanjutnya membuat tabel dan kolom database "aplikasilogin". pada connection "jdbc:mysql://localhost:3306/aplikasilogin?zeroDateTimeBehavior=convertToNull [root on Default schema]" pilih nama database "aplikasilogin" dan klik kanan pada table > create table, isikan nama tabel dengan nama "user". selanjutnya add column. isiskan nama colomn "id,username,password" untuk detail pembuatan tabel dan kolom silahkan lihat gambar berikut :

Selesai membuat database MySQL kembali ke jendela project java pada NetBeans IDE.

Membuat Form Login Java

/*

 * To change this license header, choose License Headers in Project Properties.

 * To change this template file, choose Tools | Templates

 * and open the template in the editor.

 */

package aplikasilogin;

/**

 *

 * @author b0x

 */

public class NewClass {

    public static boolean authenticate(String username, String password) {

        // hardcoded username and password

        if (username.equals("sectorcode") && password.equals("ganteng")) {

            return true;

        }

        return false;

    }

}

/*

 * To change this license header, choose License Headers in Project Properties.

 * To change this template file, choose Tools | Templates

 * and open the template in the editor.

 */

package aplikasilogin;

/**

 *

 * @author b0x

 */

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

  

public class loginclass extends JDialog {

  

    private JTextField tfUsername;

    private JPasswordField pfPassword;

    private JLabel lbUsername;

    private JLabel lbPassword;

    private JButton btnLogin;

    private JButton btnCancel;

    private boolean succeeded;

  

    public loginclass(Frame parent) {

        super(parent, "Login", true);

        //

        JPanel panel = new JPanel(new GridBagLayout());

        GridBagConstraints cs = new GridBagConstraints();

  

        cs.fill = GridBagConstraints.HORIZONTAL;

  

        lbUsername = new JLabel("Username: ");

        cs.gridx = 0;

        cs.gridy = 0;

        cs.gridwidth = 1;

        panel.add(lbUsername, cs);

  

        tfUsername = new JTextField(20);

        cs.gridx = 1;

        cs.gridy = 0;

        cs.gridwidth = 2;

        panel.add(tfUsername, cs);

  

        lbPassword = new JLabel("Password: ");

        cs.gridx = 0;

        cs.gridy = 1;

        cs.gridwidth = 1;

        panel.add(lbPassword, cs);

  

        pfPassword = new JPasswordField(20);

        cs.gridx = 1;

        cs.gridy = 1;

        cs.gridwidth = 2;

        panel.add(pfPassword, cs);

        panel.setBorder(new LineBorder(Color.GRAY));

  

        btnLogin = new JButton("Login");

  

        btnLogin.addActionListener(new ActionListener() {

  

            public void actionPerformed(ActionEvent e) {

                if (Login.authenticate(getUsername(), getPassword())) {

                    JOptionPane.showMessageDialog(LoginDialog.this,

                            "Hi " + getUsername() + "! You have successfully logged in.",

                            "Login",

                            JOptionPane.INFORMATION_MESSAGE);

                    succeeded = true;

                    dispose();

                } else {

                    JOptionPane.showMessageDialog(LoginDialog.this,

                            "Invalid username or password",

                            "Login",

                            JOptionPane.ERROR_MESSAGE);

                    // reset username and password

                    tfUsername.setText("");

                    pfPassword.setText("");

                    succeeded = false;

  

                }

            }

        });

        btnCancel = new JButton("Cancel");

        btnCancel.addActionListener(new ActionListener() {

  

            public void actionPerformed(ActionEvent e) {

                dispose();

            }

        });

        JPanel bp = new JPanel();

        bp.add(btnLogin);

        bp.add(btnCancel);

  

        getContentPane().add(panel, BorderLayout.CENTER);

        getContentPane().add(bp, BorderLayout.PAGE_END);

  

        pack();

        setResizable(false);

        setLocationRelativeTo(parent);

    }

  

    public String getUsername() {

        return tfUsername.getText().trim();

    }

  

    public String getPassword() {

        return new String(pfPassword.getPassword());

    }

  

    public boolean isSucceeded() {

        return succeeded;

    }

}

/*

 * To change this license header, choose License Headers in Project Properties.

 * To change this template file, choose Tools | Templates

 * and open the template in the editor.

 */

package aplikasilogin;

/**

 *

 * @author b0x

 */

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

  

public class Main {

    public static void main(String[] args) {

        final JFrame frame = new JFrame("JDialog Demo");

        final JButton btnLogin = new JButton("Click to login");

  

        btnLogin.addActionListener(

                new ActionListener(){

                    public void actionPerformed(ActionEvent e) {

                        LoginDialog loginDlg = new LoginDialog(frame);

                        loginDlg.setVisible(true);

                        // if logon successfully

                        if(loginDlg.isSucceeded()){

                            btnLogin.setText("Hi " + loginDlg.getUsername() + "!");

                        }

                    }

                });

  

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(300, 100);

        frame.setLayout(new FlowLayout());

        frame.getContentPane().add(btnLogin);

        frame.setVisible(true);

    }

}