How do I implement user login in a Java application?

How do I implement user login in a Java application?

To implement user login in a Java application, you can use Java Servlets and JSP for web applications or JavaFX for desktop applications. Would you like a code example?

Yes, please provide a code example for a web application.

Here's a simple example using Servlets:

@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        // Validate credentials
        if (username.equals("admin") && password.equals("password")) {
            response.sendRedirect("/welcome.jsp");
        } else {
            response.sendRedirect("/login.jsp?error=true");
        }
    }
}

This code checks the username and password and redirects accordingly. Do you need help with anything else?

What about securing the login process?

To secure the login process, consider using HTTPS, hashing passwords with bcrypt, and implementing session management. Would you like more details on any of these?