NewJFrame.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/GUIForms/JFrame.java to edit this template
 */

/**
 *
 * @author drago
 */
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.swing.JOptionPane;
//image packeges

public class NewJFrame extends javax.swing.JFrame {

    /**
     * Creates new form NewJFrame
     */
    public NewJFrame() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        username = new javax.swing.JLabel();
        in_username = new javax.swing.JTextField();
        password = new javax.swing.JLabel();
        in_password = new javax.swing.JPasswordField();
        btn_login = new javax.swing.JButton();
        jLabel3 = new javax.swing.JLabel();
        signup = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        username.setText("Username :");

        in_username.setBackground(new java.awt.Color(204, 204, 204));
        in_username.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                in_usernameActionPerformed(evt);
            }
        });

        password.setText("Password :");

        in_password.setBackground(new java.awt.Color(204, 204, 204));

        btn_login.setBackground(new java.awt.Color(102, 153, 255));
        btn_login.setFont(new java.awt.Font("Segoe UI", 1, 14)); // NOI18N
        btn_login.setForeground(new java.awt.Color(255, 255, 255));
        btn_login.setText("Login");
        btn_login.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btn_loginActionPerformed(evt);
            }
        });

        jLabel3.setText("Don't have an account?");

        signup.setForeground(new java.awt.Color(51, 153, 255));
        signup.setText("Sign up");
        signup.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                signupActionPerformed(evt);
            }
        });

        jLabel2.setFont(new java.awt.Font("Sitka Text", 3, 36)); // NOI18N
        jLabel2.setText("Login Form");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(94, 94, 94)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(password)
                            .addComponent(username))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(in_password, javax.swing.GroupLayout.PREFERRED_SIZE, 249, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(in_username, javax.swing.GroupLayout.PREFERRED_SIZE, 249, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btn_login, javax.swing.GroupLayout.PREFERRED_SIZE, 249, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(100, 100, 100)
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(signup)))
                .addContainerGap(160, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jLabel2)
                .addGap(180, 180, 180))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(54, 54, 54)
                .addComponent(jLabel2)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(username)
                    .addComponent(in_username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(password)
                    .addComponent(in_password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(btn_login, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(signup))
                .addContainerGap(190, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void in_usernameActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_in_usernameActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_in_usernameActionPerformed

    private void btn_loginActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btn_loginActionPerformed
 String userInput = in_username.getText();
        String password = new String(in_password.getPassword());

        // JDBC connection parameters
        String url = "jdbc:mysql://localhost:3306/login_form";
        String user = "root";
        String pass = "";

        try {
            // Explicitly load the MySQL JDBC driver
            Class.forName("com.mysql.cj.jdbc.Driver");

            try (Connection connection = DriverManager.getConnection(url, user, pass)) {
                // SQL query to check if the user with the given credentials exists (using either username or email)
                String query = "SELECT * FROM user WHERE (username = ? OR email = ?) AND password = ?";
                try (PreparedStatement preparedStatement = connection.prepareStatement(query)) {
                    preparedStatement.setString(1, userInput);
                    preparedStatement.setString(2, userInput);
                    preparedStatement.setString(3, password);

                    // Execute the query
                    try (ResultSet resultSet = preparedStatement.executeQuery()) {
                        if (resultSet.next()) {
                            // User exists, login successful
                            JOptionPane.showMessageDialog(this, "Login successful!");
                            welcome wl = new welcome();
                            
                        wl.setVisible(true);
                        this.dispose();
                        } else {
                            // User does not exist or invalid credentials
                            JOptionPane.showMessageDialog(this, "Invalid username or email, or password. Please try again.");
                        }
                    }
                }
            }
        } catch (ClassNotFoundException | SQLException ex) {
            // Handle exceptions
            ex.printStackTrace();
        }           
    }//GEN-LAST:event_btn_loginActionPerformed

    private void signupActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_signupActionPerformed
                        regg reg = new regg();
                        reg.setVisible(true);

                        // Close or hide the registration form
                        this.dispose();    }//GEN-LAST:event_signupActionPerformed

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btn_login;
    private javax.swing.JPasswordField in_password;
    private javax.swing.JTextField in_username;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel password;
    private javax.swing.JButton signup;
    private javax.swing.JLabel username;
    // End of variables declaration//GEN-END:variables
}