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, buat kamu yang belum bisa membuat database silahkan baca Tutorial Lengkap Cara Membuat Database MySQL di PhpMyAdmin, atau bisa juga menyimak tutorial membuat form login sederhana dengan java ini sampe habis ya.
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;
}
}
/*Jangan sungkan - sungkan untuk bertanya jika belum mengerti, jika masih bingung dengan tutorial membuat form login diatas silahkan lihat video tutorial java berikut :
* 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);
}
}
terima kasih.