Java Login Form

Java Login Form + And Show Another Form

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In this java Tutorial we will see How To Create A Login Form With Mysql Database And Close The Login Window And Open Another JFrame In Java NetBeans .


Part 1 


Part 2


Project Source Code:

package MyPackage;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;

public class Java_Login_Form extends javax.swing.JFrame {

    /**
     * Creates new form Java_Login_Form
     */
    public Java_Login_Form() {
        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">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jTextField_Username = new javax.swing.JTextField();
        jPasswordField_Password = new javax.swing.JPasswordField();
        jButton_Login = new javax.swing.JButton();
        jButton_Cancel = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/JAVA_VIDEOS_TUTORIALS/icons/lock 2.png"))); // NOI18N

        jLabel2.setText("Username : ");

        jLabel3.setText("Password :");

        jButton_Login.setText("Login");
        jButton_Login.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton_LoginActionPerformed(evt);
            }
        });

        jButton_Cancel.setText("Cancel");
        jButton_Cancel.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton_CancelActionPerformed(evt);
            }
        });

        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(19, 19, 19)
                .addComponent(jLabel1)
                .addGap(38, 38, 38)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 70, Short.MAX_VALUE)
                            .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jTextField_Username)
                            .addComponent(jPasswordField_Password, javax.swing.GroupLayout.DEFAULT_SIZE, 166, Short.MAX_VALUE)))
                    .addComponent(jButton_Login, javax.swing.GroupLayout.PREFERRED_SIZE, 86, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(105, Short.MAX_VALUE))
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(263, 263, 263)
                    .addComponent(jButton_Cancel, javax.swing.GroupLayout.PREFERRED_SIZE, 86, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addContainerGap(265, Short.MAX_VALUE)))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(22, 22, 22)
                        .addComponent(jLabel1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(65, 65, 65)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel2)
                            .addComponent(jTextField_Username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(69, 69, 69)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel3)
                            .addComponent(jPasswordField_Password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(34, 34, 34)
                        .addComponent(jButton_Login, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(38, Short.MAX_VALUE))
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addContainerGap(210, Short.MAX_VALUE)
                    .addComponent(jButton_Cancel, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(36, 36, 36)))
        );

        pack();
    }// </editor-fold>                        

    private void jButton_CancelActionPerformed(java.awt.event.ActionEvent evt) {                                               
        System.exit(0);
    }                                              

    private void jButton_LoginActionPerformed(java.awt.event.ActionEvent evt) {                                              
        Connection connection;
        PreparedStatement ps;
       
        try {
            connection = DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "");
            ps = connection.prepareStatement("SELECT * FROM users WHERE username = ? AND password = ?");
            ps.setString(1, jTextField_Username.getText());
            ps.setString(2, String.valueOf(jPasswordField_Password.getPassword()));
            ResultSet rs = ps.executeQuery();
            
            if(rs.next())
            {
                setVisible(false);
                MainForm mf = new MainForm();
                mf.setVisible(true);
            }else{
                JOptionPane.showMessageDialog(this, "Username Or Password Are Invalid");
            }
        } catch (SQLException ex) {
            Logger.getLogger(Java_Login_Form.class.getName()).log(Level.SEVERE, null, ex);
        }
    }                                             

    /**
     * @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(Java_Login_Form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Java_Login_Form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Java_Login_Form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Java_Login_Form.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 Java_Login_Form().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton_Cancel;
    private javax.swing.JButton jButton_Login;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPasswordField jPasswordField_Password;
    private javax.swing.JTextField jTextField_Username;
    // End of variables declaration                   
}


///////////////OUTPUT:

java login window


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