UI
package ui;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import techServ.UserDA;
import domain.User;

public class LoginUI extends JFrame
{
            	private JPanel panel;
            	private JTextField usernameTF;
            	private JLabel loginB, usernameL, passwordL;
            	private JPasswordField password;
            	private String p;

            	private User user;

            	private UserDA userDA;

            	private Connection connection;

            	private LoginHandler loginHandler;

            	LoginUI()
            	{
                            	//        	Remove border and Title bar of the Window
                            	setUndecorated(true);

                            	setSize(350,250);
                            	setLayout(null);

//                                        	Method for initialization of the objects declared.
                            	initializedComponents();

//                                        	Method for Setting Objects their specific bounds in the window.
                            	setComponentsBounds();

//                                        	Method for Setting Panels.
                            	setPanel();

                            	loginHandler = new LoginHandler();
                            	loginB.addMouseListener(loginHandler);
                            	usernameTF.addKeyListener(loginHandler);
                            	password.addKeyListener(loginHandler);

//                                        	Adding panel to the Frame.
                            	add(panel);

//                                        	Setting the Frame to the center of screen.
                            	setLocationRelativeTo(null);
                            	setDefaultCloseOperation(EXIT_ON_CLOSE);
                            	setVisible(true);
                            	setResizable(false);
                            	repaint();
            	}

            	private class LoginHandler implements MouseListener, KeyListener
            	{

                            	public void mouseClicked(MouseEvent e){
                                            	if(loginB == e.getSource()){
                                                            	validateUser();
                                            	}
                            	}
                            	public void mouseEntered(MouseEvent e){}
            	            	public void mouseExited(MouseEvent e){}
                            	public void mousePressed(MouseEvent e)
                            	{
                                            	loginB.setIcon(new ImageIcon(getClass().getResource("LoginButton2.png")));
                                            	repaint();
                            	}
                            	public void mouseReleased(MouseEvent e){}
                            	public void keyPressed(KeyEvent e)
                            	{
                                            	if(e.getKeyCode() == KeyEvent.VK_ENTER){
                                                            	loginB.setIcon(new ImageIcon(getClass().getResource("LoginButton2.png")));
                                                            	validateUser();
                                            	}
                            	}
                            	public void keyReleased(KeyEvent e) {}
                            	@Override
                            	public void keyTyped(KeyEvent arg0) {}
            	}

            	private void validateUser(){
//                                        	Getting data in JPasswordField
                            	char[] passwordChar = password.getPassword();
                            	p = new String(passwordChar);

                            	User user = new User();
                            	user.setUsername(usernameTF.getText());
                            	user.setPassword(p);
//                                        	Access the Database
                            	userDA = new UserDA(getConnection(), user.getUsername());

                            	if(user.getUsername().equals(userDA.getUser(user).getUsername()) &&
                                                            	user.getPassword().equals(userDA.getUser(user).getPassword()))
                            	{
                                            	displayMain(userDA.getUser(user));
                                            	dispose();
                            	}else
                            	{
                                            	JOptionPane.showMessageDialog(null, "Invalid Username or Password\nPlease try again.",
                                                                            	"Error Messsage", JOptionPane.INFORMATION_MESSAGE);
                                            	loginB.setIcon(new ImageIcon(getClass().getResource("LoginButton1.png")));
                            	}
            	}

            	public void displayMain(User user)
            	{
                            	new MainUI(user, userDA);

            	}

            	public Connection getConnection(){
                            	try
                            	{
                                            	Class.forName("com.ibm.db2.jcc.DB2Driver");
                                            	connection = DriverManager.getConnection("jdbc:db2://localhost:50000/hrms2","Karl Louie", "fingerprintaz");
                            	}
                            	catch (ClassNotFoundException e)
                            	{
                                            	e.printStackTrace();
                            	}
                            	catch (SQLException e)
                            	{
                                            	e.printStackTrace();
                            	}

                            	return connection;
            	}

            	private void setPanel()
            	{
                            	panel = new JPanel()
                            	{
                                            	public void paintComponent(Graphics g)
        	{
                	Image img = Toolkit.getDefaultToolkit().getImage(getClass().getResource("LoginBG.png"));
                	g.drawImage(img, 0, 0, this.getWidth(), this.getHeight(), this);
        	}
                            	};
                            	panel.setLayout(null);
                            	panel.setBounds(0, 0, 350, 250);
                            	panel.add(usernameTF);
                            	panel.add(password);
                            	panel.add(loginB);
            	}

            	private void initializedComponents()
            	{
                            	usernameTF = new JTextField(15);
                            	password = new JPasswordField(15);
                            	loginB = new JLabel(new ImageIcon(getClass().getResource("LoginButton1.png")));

            	}

            	private void setComponentsBounds()
            	{
                            	usernameTF.setBounds(155, 162, 150, 17);
                            	password.setBounds(155, 182, 150, 17);
                            	loginB.setBounds(133, 215, 93, 20);

            	}



            	public static void main (String[] args)
            	{
                            	new LoginUI();
            	}
}