Java and Javascript


A lot of beginners may easily get confused been between Java and JavaScript.  A majority of the people still think that JavaScript is part of Java platform. The truth is that JavaScript has nothing to do with Java. The only common thing between Java and Javascript is the word “Java”. Just as Tennis is very different than Table Tennis Similarly, Java is very different than Javascript.

What is Java?

Java is a general-purpose, high-level programming language developed by Sun Microsystems. Java is an object-oriented language. Java was designed to have the look and feel of the C++ language, but it is simpler to use than C++. The Java programming language was developed by a small team of engineers, known as the Green Team, who initiated the language in 1991. The language was originally called OAK. Oak was unsuccessful and in 1995 Sun changed the name to Java and modified the language to take advantage of the burgeoning World Wide Web. Java can be used to create complete applications that may run on a single computer or be distributed among servers and clients in a network. It can also be used to build a small application module or applet for use as part of a web page.

What is Javascript?

Javascript is a dynamic computer programming language. It is lightweight and most commonly used as a part of web pages, whose implementations allow the client-side script to interact with the user and make dynamic pages. It is an interpreted programming language with object-oriented capabilities.JavaScript was first known as LiveScript but Netscape changed its name to JavaScript because of the excitement being generated by Java. JavaScript made its first appearance in Netscape 2.0 in 1995 with the name LiveScript. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers.


The difference between Java and Javascript:



In today’s world calling JavaScript just a client-side scripting language would not be fair, as it’s now been used in servers also using node.js and people are doing object-oriented development in JavaScript. There are many differences between Java and JavaScript from how they are written, compiled and executed. The capability of Java and JavaScript vary significantly. Java is a full feature Object-oriented programming language used almost everywhere starting from programming credit card to server-side coding. Android uses Java as a programming language for creating Android apps. Swing is a Java API used to create desktop applications and Java EE is a Java platform for developing web and enterprise applications. Whereas JavaScript is mainly used to bring interactivity into web pages.

You can use JavaScript to validate user input, create animation and effects in HTML page and can do a lot of interactive stuff e.g. reacting on button click, mouse movement etc. Below are some crucial differences between Java and Javascript, mostly from a programmers perspective.

A) Static vs Dynamic Typed language

Java uses static type checking where the type of a variable is checked at compile-time. The programmer must specify the type like string, etc. of any variable they create. JavaScript, like most scripting languages, uses dynamic typing, where type safety is verified at runtime. It is not required for a programmer to specify the type of any variable they create. There are many merits and demerits for these two paradigms but the primary advantage of static type checking is that type errors are caught early in development and because the compiler knows exactly what data types are being used, code typically executes faster or uses less memory. The primary advantage of dynamic type checking is programmer productivity you are free to assign types at your leisure.

B) Support of Closures

JavaScript supports closures in form of anonymous function. In simple words, you can pass a function as an argument to another function. Java doesn’t treat the method as the first-class citizen and the only way to simulate closure is by using an anonymous class. Java 8 has brought real closure support in Java in form of lambda expression and this has made things much easier. It’s very easy to write expressive code without much clutter in Java 8.

C) Compiled vs Interpreted

Java is considered a compiled programming language, while JavaScript is considered an interpreted scripting language. The key difference is in the implementation of Java is compiled into bytecode and run on a virtual machine, whereas JavaScript can be interpreted directly by a browser in the syntax it is written.

Below are some similarities between Java and Javascript:


Java is an object-oriented programming language whereas Javascript is an object-oriented scripting language. Both languages require the developer to code in terms of objects and their relationships to one another. By extension, this gives both languages access to techniques like inheritance, encapsulation, and polymorphism.

B) Front End Development

Both languages can be used in aspects of front-end development. JavaScript can be embedded directly into HTML, implemented as a framework or library; Java can be used as a Java applet.



That’s all on the differences as well as similarities between Java and Javascript. Both Java and Javascript are totally different. Java is a general purpose programming language, while Javascript is a scripting language for HTML. JavaScript was originally named as Live script but it was later changed to Javascript as the idea was to make it a complementary scripting language to go with Java.

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