Login

Above UI we are going to create by Awt for Login Window in our Flight Booking System desktop application. For that first we create a window and configure its title, size and color. Here we are creating a window at Top Level so we can add this window at the top of any other window And creating a JPanel For adding more Fields.

    
        
			frame = new JFrame("Login");
	        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
	        frame.pack();
			Utils.centeredFrame(frame, winWidth,winHeight, "Login");

	        frame.setVisible(true);
	        frame.setResizable(false);
	        
	        Container mainContainer=frame.getContentPane();
	        mainContainer.setBackground(Color.gray);

	        checkLogin();	
	    

	        
	        JPanel panel = new JPanel();
	        panel.setLayout(null);
		    panel.setOpaque(false);
		    panel.setBackground(Color.BLACK);
		    panel.setSize(new Dimension(winWidth/3,winHeight*7/10));
		    panel.setLocation(winWidth/2-winWidth/6,winHeight/10);
		    mainContainer.add(panel,BorderLayout.CENTER);
		    
		    
		    
		    JComponent jcomponent=new RoundedBackground(winWidth/2-winWidth/6,winHeight/10,winWidth/3,winHeight*7/10);// 
	        mainContainer.add(jcomponent,BorderLayout.CENTER);
	        
    

Here we create Labels and Text Fields.

    

			JLabel label=new JLabel();
	        label.setText("Login");
	        label.setBackground(Color.red);
	        label.setForeground(Color.black);
	        label.setSize(new Dimension(winWidth/3,winHeight/10));
	        label.setFont(new Font("Lucida",Font.PLAIN,48));
	        label.setAlignmentX(JLabel.CENTER_ALIGNMENT);
	        label.setLocation(winWidth*11/100, winHeight*8/100); 
	        panel.add(label, BorderLayout.CENTER);
	        
	        JLabel user_name=new JLabel();
	        user_name.setText("User name");
	        user_name.setBackground(Color.red);
	        user_name.setForeground(Color.black);
	        user_name.setFont(new Font("Lucida",Font.PLAIN,12));
	        user_name.setSize(new Dimension(winWidth/3,winHeight/10));
	        user_name.setLocation(winWidth*4/100, winHeight*20/100); 
	        panel.add(user_name, BorderLayout.SOUTH);
	        Border loweredetched = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED);

	        TitledBorder usernametittle = BorderFactory.createTitledBorder(loweredetched, "User Name");
	        usernametittle.setTitleJustification(TitledBorder.LEFT);
	        
            TitledBorder passwordTittled = BorderFactory.createTitledBorder(loweredetched, "Password");
            passwordTittled.setTitleJustification(TitledBorder.LEFT);

	        usernameField = new JTextField();
	        usernameField.setSize(new Dimension(winWidth/4,winHeight/15));
	        usernameField.setLocation(winWidth*4/100, winHeight*28/100);	
	        usernameField.setBorder(usernametittle);
	        panel.add(usernameField,BorderLayout.CENTER);

	        panel.validate();
	        panel.repaint();
	        
	        JLabel password=new JLabel();
	        password.setText("password");
	        password.setBackground(Color.red);
	        password.setForeground(Color.black);
	        password.setFont(new Font("Lucida",Font.PLAIN,12));	        
	        password.setSize(new Dimension(winWidth/3,winHeight/10));
	        password.setLocation(winWidth*4/100, winHeight*32/100); 
	        panel.add(password, BorderLayout.SOUTH);
	        
	        passwordField = new JPasswordField();
	        passwordField.setSize(new Dimension(winWidth/4,winHeight/15));
	        passwordField.setLocation(winWidth*4/100, winHeight*40/100);	       
	        panel.add(passwordField,BorderLayout.CENTER);
	        passwordField.setBorder(passwordTittled);
	        
	        panel.validate();
	        panel.repaint();
         

Here we create "LOGIN" Button and adding a actionlistener on it.

    
			JButton loginButton = new JButton(new ImageIcon(((new ImageIcon("images/button40.png")).getImage()).getScaledInstance(winWidth*15/100,winHeight*6/100, java.awt.Image.SCALE_SMOOTH)));
	        loginButton.setContentAreaFilled(false);
	        loginButton.setBorder(null);
	        loginButton.setText("LOGIN");
	        loginButton.setHorizontalTextPosition(JButton.CENTER);
	        loginButton.setVerticalTextPosition(JButton.CENTER);
	        loginButton.setOpaque(false);
	        loginButton.setContentAreaFilled(false);
	        loginButton.setBorderPainted(false);
	        loginButton.setFont(new java.awt.Font("Serif",1, 15));
	        loginButton.setForeground(Color.white);
	        loginButton.setBounds(winWidth*9/100,winHeight*58/100,winWidth*15/100,winHeight*6/100);  
	        panel.add(loginButton);
	        loginButton.addActionListener(new ActionListener() {
	            @Override
	            public void actionPerformed(ActionEvent ae) {
	            	
	            	 String usernameString = usernameField.getText();
	            	 String passString = passwordField.getText();
	            	 String dbUserName = "";
	            	 String dbPassword = "";
	            	 String key1 = "ADMIN_ID";
	            	 String key2 = "ADMIN_PASS";
	            	 
	            	 if(!usernameString.isEmpty() && !passString.isEmpty()) {
	            		 conn = SqliteConnection.ConnectDb();
	            	 try {
						insert = conn.prepareStatement("SELECT value FROM system_setting WHERE key = 'ADMIN_ID'");
						
						ResultSet rs = insert.executeQuery();
						 
						 while (rs.next()) {    
							 dbUserName = rs.getString(1);  
					        }
	            	
						 insert = conn.prepareStatement("SELECT value FROM system_setting WHERE key = 'ADMIN_PASS'");
						 ResultSet rs2 = insert.executeQuery();
							 
						  while (rs2.next()) {    
							 dbPassword = rs2.getString(1);  
						     }	
						
					} catch (SQLException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					 
	            	 System.out.println(usernameString + dbUserName + passString + dbPassword);
	            	 System.out.println(usernameString.equals(dbUserName) && passString.equals(dbPassword));

						  
					if( usernameString.equals(dbUserName) && passString.equals(dbPassword)) {
						
						String key_is_logined = "IS_LOGINED";
					            
					            try {
									
									insert = conn.prepareStatement("UPDATE system_setting "
							                + "SET value = ? "
							                + "WHERE key = ?");
									insert.setString(1, "1");
									insert.setString(2, key_is_logined);
									insert.executeUpdate();
									conn.close();
								} catch (SQLException e3) {
									// TODO Auto-generated catch block
									e3.printStackTrace();
								}
					            
					            navigate_to_dashboard();
						
					}else {
						JOptionPane.showMessageDialog(frame, "Unmatched");
					}
					
	            }else {
	            	String var = "Usdername Should not be empty,  Password Should not be empty";
	            	JOptionPane.showMessageDialog(frame, var);
	            }
						 
	  	
	            }
	        });	        
	        
	       
	        
	        panel.revalidate();
	        panel.repaint(); 

	 }
     

Here in this function we check user id and password is correct or not, if details are correct then we move to next window dashboard.

    
	private void checkLogin() {
		 
		 
		 String key_id = "IS_LOGINED";
		 String loginKey = "";
		 String adminId = "";
		 
		 conn = SqliteConnection.ConnectDb();
    	 try {
			insert = conn.prepareStatement("SELECT value FROM system_setting WHERE key = 'IS_LOGINED'");
			
			ResultSet rs = insert.executeQuery();
			 
			 while (rs.next()) {    
				 loginKey = rs.getString(1);  
		        }
			 
			 if(loginKey.equals("1")) {
				 
				 insert = conn.prepareStatement("SELECT value FROM system_setting WHERE key = 'ADMIN_ID'");
					
					ResultSet rs2 = insert.executeQuery();
					 
					 while (rs2.next()) {    
						 adminId = rs2.getString(1);  
				        }
					 conn.close();
				 
					 AppConstant.STAFF_NAME = adminId;
					 navigate_to_dashboard();
			 }
			 
		 
    	 } catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
		}
		 
	 }
	 
	 private void navigate_to_dashboard() {
		 new DashboardNew(frame);
	 }