Java Programming By Mohit

I can provide you with an example code snippet in Java for email validation using a `JTextField`. Here's an example: import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.regex.*; public class EmailValidationExample {     private JFrame frame;     private JTextField emailTextField;     private JButton validateButton;     public EmailValidationExample() {         frame = new JFrame("Email Validation");         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);                  emailTextField = new JTextField(20);         validateButton = new JButton("Validate");         validateButton.addActionListener(new ActionListener() {             public void actionPerformed(ActionEvent e) {                 String email = emailTextField...

  In C#, event handling is the process of responding to an occurrence of a particular event. Events can be raised by user actions, such as clicking a button or pressing a key, or they can be raised by the system or other components of an application. Here are the steps involved in handling events in C#: Define the delegate: A delegate is a type that represents a method that can be called when an event occurs. In C#, delegates are used to define event handlers. You can define your own delegate or use one of the pre-defined delegates provided by the .NET framework. Define the event: An event is a mechanism for raising a notification that something has happened. In C#, you can define your own events by creating an instance of the delegate that will handle the event. Subscribe to the event: To handle an event, you must subscribe to it. This is done by creating an instance of the delegate that will handle the event, and then adding this instance to the event's invocation list. Define th...