How to make an user interface for database connection in java

package m1;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.swing.JOptionPane;

private void btnOkeActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        Connection koneksi;

        String database=txtNama.getText().trim();

        String konek="jdbc:mysql://localhost:3306/"+ database;

        String user = txtUser.getText().trim();

        String pass =txtPassword.getText().trim();

        try{

            Class.forName("com.mysql.jdbc.Driver");

            koneksi=DriverManager.getConnection(konek,user,pass);

            JOptionPane.showMessageDialog(null, "Koneksi Berhasil");

        }catch(ClassNotFoundException ex){

            Logger.getLogger(FKoneksi.class.getName()).log(Level.SEVERE,null, ex);

            JOptionPane.showMessageDialog(null, "Driver Tidak Ada");

        }catch(SQLException ex){

             Logger.getLogger(FKoneksi.class.getName()).log(Level.SEVERE,null, ex);

            JOptionPane.showMessageDialog(null, "Koneksi Gagal");

        }

}

private void btnTutupActionPerformed(java.awt.event.ActionEvent evt) {

        System.exit(0);

    }

And here is the result :