Create a login form with required validations and all dialog box.

Login Form With Dialog Box

A Dialog window is an independent subwindow meant to carry temporary notice apart
from the main Swing Application Window. Most Dialogs present an error message
or warning to a user, but Dialogs can present images, directory trees, or just
about anything compatible with the main Swing Application that manages them.
import javax.swing.*; 
import java.awt.event.*; 
 
package login_form; 
public class Login_Frame extends JFrame  
{ 
    public Login_Frame()  
      { 
            initComponents(); 
           Display_Dialog.setVisible(false); 
      } 
     
    
 private void initComponents() { 
 
        JTextField Uname_Text = new JTextField(); 
        JPasswordField Password_Text = new JPasswordField(); 
        JLabel Uname_label = new JLabel(); 
        JLabel Password_label = new JLabel(); 
        JButton Submit_Button = new JButton(); 
        JButton Reset_Button = new JButton(); 
        JOptionPane Display_Dialog = new JOptionPane(); 
 
        Uname_Text.setToolTipText("Enter Username"); 
        Uname_Text.addActionListener(new ActionListener() 
          { 
              public void actionPerformed(ActionEvent evt) 
                { 
                      Uname_TextActionPerformed(evt); 
                 } 
          }); 
 
        Uname_label.setText("Username"); 
        Password_label.setText("Password"); 
        Submit_Button.setText("Submit"); 
        Submit_Button.addActionListener(new ActionListener()  
         { 
              public void actionPerformed(ActionEvent evt)  
                  { 
                     Submit_ButtonActionPerformed(evt); 
                  } 
          }); 
 
        Reset_Button.setText("Exit"); 
        Reset_Button.addActionListener(new ActionListener()  
          { 
              public void actionPerformed(ActionEvent evt)  
                { 
                    Reset_ButtonActionPerformed(evt); 
                } 
          }); 
 
        GroupLayout layout = new GroupLayout(getContentPane()); 
        getContentPane().setLayout(layout); 
        pack(); 
    }  
private void Submit_ButtonActionPerformed(ActionEvent evt) 
{ 
  if(Uname_Text.getText().equals("Username")) 
  { 
        if(Password_Text.getText().equals("ABC")) 
         { 
            Display_Dialog.showMessageDialog(this,"You have Successfully 
Logged In"); 
         } 
        else 
        { 
            Display_Dialog.showMessageDialog(this,"You have Entered Wrong 
Password"); 
        } 
  } 
       else 
        { 
           Display_Dialog.showMessageDialog(this,"You have Entered Wrong 
Username"); 
         } 
 
  } 
private void Reset_ButtonActionPerformed(ActionEvent evt)  
 { 
  System.exit(0); 
 } 

 public static void main(String args[])  
     { 
         new Login_Frame().setVisible(true); 
     }

}