Java vs JavaScript

Difference Between Java and JavaScript

What is Java?

Java is an OOP (object-oriented programming) language which came to usage in 1995. Java was developed at sun microsystems which later acquired by Oracle. Programs or applications developed in Java will execute in a JVM (Java virtual machine) by which we can run the same program on multiple platforms and systems/devices etc. If we want to run Java program on the browser we need to use Java applets which are embedded as a plugin which is not suggested. So Java is mostly used for standalone applications or back-end development. Java was designed by James Gosling and its major implementation was OpenJDK.

What is JavaScript?

JavaScript is an object-oriented scripting language which allows you to create dynamic HTML pages with interactive effects within a webpage. JavaScript was available in the browser until Google chrome released its JavaScript engine as “node.js”. JavaScript allows you to process and maintain data within the browser. We able to use JavaScript across full stack development with help of node.js which helps frontend developers to handle backend logic and application programming interface without learning a new programming language. JavaScript was created by Brendan Eich at Netscape which came into existence in 1995. It runs on web-browser only and it is an interpreted programming language.

Head To Head Comparison Between Java vs JavaScript

Below are the Top 8 comparisons between Java vs JavaScript

Key Differences between Java and Java-Script:

Below is the list of points that describe the difference between Java and JavaScript

• Java has strongly typed language whereas JavaScript is loosely typed language i.e. we need to declare variables using set object before using them whereas in JavaScript we can use a variable in a flexible way.
• Java is a compiled and interpreted programming language and executed on JVM which requires JDK and JRE whereas JavaScript is interpreted which is executed on a browser and it is plain text.
• Java is platform independent with bytecode whereas JavaScript code is written is based on browser compatibility as some code might work on specific versions of browsers and doesn’t work on different versions of the same browser.
• Java has statically typed language whereas JavaScript is dynamically typed language as variables declared at compile time with the data type and JavaScript can accept different kinds of data types.
• In Java, we have the support of constructor whereas in JavaScript constructor is a function and no rules for constructors in JavaScript like in Java.
• Java is class-based programming language whereas JavaScript is prototype based although it has object-oriented programming abilities.
• Java ends non-block statements with a semicolon whereas JavaScript uses semicolons at end of certain lines.
• Java has an implicit class scope whereas JavaScript has the implicit global scope.
• Java has support for different numeric data types whereas JavaScript mostly deals with floating point data types.
• Java has switch structure which accepts only constants whereas JavaScript also has switch structure which accepts any values.
• Java has the support of annotations on classes whereas JavaScript has decorators on same declarations with different semantics.
• JavaScript has support for closures where we can pass a function as an argument to another function whereas Java doesn’t have this support but can be achieved using an anonymous class.
• Java has the support of Enum data type by which we can declare a set of constants whereas JavaScript doesn’t have set a constant declaration.
• Both Java and JavaScript languages are open source by inherently as we can edit or modify the actual code and use. Java achieves concurrency using thread based approach whereas JavaScript uses event-based mechanism.
• JavaScript has more popularity with respect to projects created in last 5 years on GitHub developer.

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Comparison Table Between Java vs JavaScript

Following is the comparison table between Java vs JavaScript

Conclusion – Java vs JavaScript

Finally, it’s an overview of comparison between Java and JavaScript. I hope you will have a good understanding of both languages. It is good to learn both Java and JavaScript as we can become full stack developer if we mastered. As they are almost different languages, one will be used for most applications and backend programs whereas other will be used for making web applications, interactive effects/features using it which can run on different browsers.

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