Node.js VS Java And Usage Of Node.js : week 3

      Node.js is a server side framework which is used to build network applications and servers with JavaScript. Using Node.js for back end development, both client side and sever side could be developed as a JavaScript stack. Node.js is not a framework, it's a development platform.
      Java is a class based, object oriented language, derived from C++. Java was developed in sun Microsystems Inc in 1991. Java is a simple programming language. Writing, compiling and debugging a program is easy in java. Java has it's own libraries, plugins, API's, run time environment and virtual machine.

• Java is an object - oriented language, derived from C++. Node.js is a framework written in C, C++, and JavaScript.
• Java is used to build complex web based, highly concurrent applications. CPU intensive tasks which requires a huge computational power can be handled by Java. Node.js is used to develop small sized projects. I/O bound operations like real time chat, media streaming, etc can be handled well using Node.js.
• Java needs a JDK(Java development kit) which includes Java compiler and JRE(Java run-time environment) to run Java on any machine. Node.js is installed through install able archive file. Node.js is a cross platform run time system and environment for applications written in JS.
• Source code of JavaScript is compiled into byte code, then byte code is converted to machine language to run on any platform. In Node.js source code is written in a source file using JS, and this JS code will be interpreted and executed by node.js interpreter. 
• Java is a server side language that can never be used in front end development. But Node.js i both front end and back end development framework.
• The concept of multi threading is used by Java. The web services process each request in a separate thread. This allows to perform many tasks at the same time without queuing the events. Node.js is single threaded where all requests are processed in a single thread. This will slowdown the performance of Node.js apps.
• Java has some frameworks like Spring, Struts, JSF, Tapestry etc. Node.js has many different frameworks such as Express.js, Sails.js, Partial.js etc.These will help to build a software application faster .
• Developing a project using Java is somewhat slower. It takes a lot of time to do the coding and developing. But when considering Node.js, it is easier to learn and the development is faster. Node.js has a lot of community developed code that can reuse. So the development process will be faster. Node.js takes about 33% fewer lines of code than Java. So creating an app with Node.js takes less time.       

      There are many things that you can do with Node.js. Apps like Paypal, Netfilx and Uber are built using Node.js.

• You can develop a group video call app with Node.js. Node.js and socket helps to build a connection and make a room. The use of WebRTC helps to make a voice or a video call over a server. Talky is an example for this technology. 
• You can create multiplayer games using Node.js. For this you need to make a Node.js server and establish a socket connection for every player and emit event of our game logic on every move.
• Also we can use Node.js in Internet Of Things. Devices of IOT such as sensors, beacons and wearable generate large floods of requests. Node.js is well suited for managing these requests through streams. Also we can control a car with our smart phone using Raspberry pi and Node.js server. We have to host our pi on Node wireless web page and open this on our smartphone. And the pi will work.  

      So As you see Node.js is very powerful and it is used by many developers these days.