What is the Difference between Java and JavaScript?

viiz December 11, 2020March 15, 2021 1 Comment

Many non-technical people believe that Java and JavaScript are similar programming languages. It is because their name sounds similar by having “Java” as an initial word. On the other hand, some believe that java and JavaScript are two different names assuming they use the same programming languages. But it’s a high alert that Java and JavaScript are completely two different programming languages. JavaScript language is not at all dependent on the java programming language. One can get the difference between java and JavaScript from this article.

Contents

What is Java?

Java is an object-oriented programming language, introduced by Sun microsystems in the year 1995. In today’s technical world java has become the key programming language as a java programming language is required to build many applications like audio, video, gaming, social media applications, and more.

Java Applications

Android apps
Information Technology
Big Data
Retail
Banking
Stock market
Big Data
Scientific and research community

What is Javascript?

Javascript is a scripting language introduced by Brandan Eich in 1995. Generally, Javascript is used for both server-side and client-side programming. the scripting language is applicable in making dynamic changes to webpages and providing user interactive elements to CSS pages.

JavaScript Applications

For server-side technologies like Node.js, MongoDB, Express.js
In front-end technologies like AngularJS, ReactJS, jQuery, and Ember.js
Dynamic Single-Page applications SPAs
Mobile App development using PhoneGap, React Native, and more

Difference between Java and Javascript

JAVA	JavaScript
Java is a programming language	JavaScript is a scripting language
Sun Microsystems has launched Java	Netscape developed the JavaScript
This is an object-oriented programming language	This is an object-based scripting language
It is a standalone language	It is not a standalone language because it needs to be integrated with HTML
Java program is executed after compilation	JavaScript integrated with HTML and then executed
Any web browser is not needed to run java programs	Web browsers necessary to run the JavaScript
Code written in Java demands large memory	JavaScript doesn’t need large memory
Java programs are saved using the “.java” extension	Javascript uses the “.js” as an extension to save programs
It is stored as Byte code in host machines	This script saved to the host machine as the source text
Multi-threading is used here to perform any complicated tasks	It is impossible to run complicated tasks using JavaScript
Declaring variables before using them in a program is necessary for Java programs	Javascript doesn’t require to follow these rules
Java is known as a strongly typed language because of its tough rules	JavaScript is termed as a weekly typed language and has relaxed syntax hence
It is a complex language to learn and develop	It is an easy scripting language to learn and implement

Major key differences between Java and JavaScript

JavaScript is the scripting language that helps to create interactive web pages, and Java is a multi-platform, network-centric, and object-oriented language.
once Java code is created it can be run on almost all of the computing platforms, but JavaScript is a cross-platform language.
Java is a static programming language where JavaScript is a dynamic language.
to save the Java code we use the “.java” file extension wherein in JavaScript we use the “.js” extension.

Observe the code snippets to know the major differences between Java and JavaScript. Code to display “Hello world!” as the final output.

Code to print “Hello world! ” in Java

class A  
 {   
public static void main(String args[]){   
    System.out.println("Hello World!");   
 }   
}  

output
Hello World!

Code to print “Hello world! ” in JavaScript

<!DOCTYPE html>  
<html>  
<body>  
<h2> Welcome to JavaScript Tutorial</h2>  
<script type= "text/javascript">  
document.write("Hello World!");    
</script>  
</body>  
</html>  

output
Hello World!

Benefits of using Java

Its Better performance
Availability of detailed documentation
More number of Java skilled developers available
Huge benefits from the third party libraries
Java is multi-threaded in nature so, it allows performing multiple tasks at a time
Easy to navigate libraries.

Benefits of using JavaScript

It is a specially designed tool for small scripts
The compiled JavaScript runs in any browser
Its an open-source Microsoft project of patronage
Enables cross-compilation
Supports classes, modules, and interfaces
JavaScript is extendable for writing large apps
It permits to create of interfaces that interact with users when the mouse hovers.
Provides immediate feedback to the visitors
JavaScript can also be used to store and retrieve the user’s information from a computer

In search of sensing the difference between Java and JavaScript, we have seen many key features of Java and JavaScript. we also listed some pros of both the languages and now, let’s list some cons of using Java and Javascript in the applications.

disadvantages of Java

Though Java code can solve some complex problems of today’s world, there are some disadvantages of using Java.

The JIT compiler of Java makes the code slow
Java code requires more memory and processing time hence, the hardware cost may increases
users do not have any control to decrease garbage, as there are no options like free(), delete()
Java never accepts programming constructs like pointers, as they belong to low-level languages

Disadvantages of JavaScript

For security reasons, client-side JavaScript does not enable reading or writing actions to its script
JavaScript does not have any of the multi-processor multi-threading to perform multiple tasks simultaneously
JavaScript cannot be used for networking applications as there no support for it

Conclusion

By now I hope it is clear that Java and Javascript are two different programming languages though their names are homogenous. Fresh computer science graduates are necessarily master in both the languages, as it shows their coding repertoire. In fact, having Java and JavaScript under one’s belt will help a programmer more employable, and they may get opportunities to avail themselves more lucrative jobs.

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