Java question

import java.io.* ; import java.net.* ; import java.util.* ; public final class WebServer { public static void main(String argv[]) throws Exception { // Set the port number. int port = 6789; // Establish the listen socket. ServerSocket welcomeSocket = new ServerSocket(6789); // Process HTTP service requests in an infinite loop. while (true) { // Listen for a TCP connection request. Socket connectionSocket = welcomeSocket.accept(); // Construct an object to process the HTTP request message. HttpRequest request = new HttpRequest(connectionSocket); // Create a new thread to process the request. Thread thread = new Thread(request); // Start the thread. thread.start(); } } }