login koneksi db

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 *//*
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 * and open the template in the editor.
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package rentalmobil.karyawan;
import java.sql.*;
import javax.swing.JOptionPane;
/**
 *
 * @author surya
 */
public class FormLOGINKARYAWAN extends javax.swing.JFrame {
    Connection con;
    Statement stt;
    ResultSet rss;
    /**
     * Creates new form FormLOGINUSER
     */
    public FormLOGINKARYAWAN() {
        initComponents();
        Koneksi();
    }
     public void Koneksi(){
    try{
        Class.forName("com.mysql.jdbc.Driver");//1. Load Driver
        String database = "jdbc:mysql://localhost:3306/rental_mobil";//2. Memanggil alamat database
        String userDtbs = "root";//username default database
        String passDtbs = "";//password default database
        con = DriverManager.getConnection(database,userDtbs,passDtbs);//3. Membuat Koneksi Database
        stt = con.createStatement();//membuat statement
        }
        catch(Exception e){
        JOptionPane.showMessageDialog(null,"Gagal Koneksi","Pesan",JOptionPane.ERROR_MESSAGE);
        }
    }

    /**
     * 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() {

        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        inputuser = new javax.swing.JTextField();
        inputpass = new javax.swing.JPasswordField();
        cmdlogin = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("LOGIN USER");

        jLabel2.setText("Username");

        jLabel3.setText("Password");

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

        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N
        jLabel1.setText("LOGIN");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel2)
                    .addComponent(jLabel3))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1)
                    .addComponent(cmdlogin)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(inputuser)
                        .addComponent(inputpass, javax.swing.GroupLayout.PREFERRED_SIZE, 125, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 27, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(inputuser, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(inputpass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(cmdlogin)
                .addContainerGap())
        );

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

    private void cmdloginActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        try{
    String sql = "SELECT * FROM tbuser WHERE username = '"+inputuser.getText()+"' and password = '"+String.valueOf(inputpass.getPassword())+"'";
    rss = stt.executeQuery(sql);
    if(rss.next()){
        String user = rss.getString(1);
        String password = rss.getString(2);
        JOptionPane.showMessageDialog(null, "Berhasil Login");
        new MainMENUKARYAWAN().show();
        this.dispose();
    }else{
        JOptionPane.showMessageDialog(null, "Gagal Login","Pesan",JOptionPane.ERROR_MESSAGE);
    }
  }catch(Exception e){
      e.printStackTrace();
  }

    }

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

    // Variables declaration - do not modify
    private javax.swing.JButton cmdlogin;
    private javax.swing.JPasswordField inputpass;
    private javax.swing.JTextField inputuser;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    // End of variables declaration
}