Multithreaded Servers in Java

Multithreaded Server: A server having more than one thread is known as Multithreaded Server. When a client sends the request, a thread is generated through which a user can communicate with the server. We need to generate multiple threads to accept multiple requests from multiple clients at the same time.

Advantages of Multithreaded Server:

• Quick and Efficient: Multithreaded server could respond efficiently and quickly to the increasing client queries quickly.
• Waiting time for users decreases: In a single-threaded server, other users had to wait until the running process gets completed but in multithreaded servers, all users can get a response at a single time so no user has to wait for other processes to finish.
• Threads are independent of each other: There is no relation between any two threads. When a client is connected a new thread is generated every time.
• The issue in one thread does not affect other threads: If any error occurs in any of the threads then no other thread is disturbed, all other processes keep running normally. In a single-threaded server, every other client had to wait if any problem occurs in the thread.

Disadvantages of Multithreaded Server:

• Complicated Code: It is difficult to write the code of the multithreaded server. These programs can not be created easily
• Debugging is difficult: Analyzing the main reason and origin of the error is difficult.

Quick Overview

We create two java files, Client.java and Server.java. Client file contains only one class Client (for creating a client). Server file has two classes, Server(creates a server) and ClientHandler(handles clients using multithreading).

Client-Side Program: A client can communicate with a server using this code. This involves