Difference Between Java and JavaScript

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What is the primary difference between Java and JavaScript?

Difference between java and javaScript is that both seems like as one was a direct descendant of the other, but in reality they are far from it. Java is an object-oriented programming language that can run on several operating systems using an interpreter.

Difference between Java and JavaScript
    Difference between Java and JavaScript

New programmers and non-tech human beings alike have lengthy stressed Java and JavaScript, however their handiest commonality is the word “Java.” Each is a programming language beneficial in its very own regard and every has strengths over the other. One isn’t always higher than the other; programmers use each Java and JavaScript for loads of exceptional tasks.

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It was developed by Sun Microsystems with the aim of creating stand-alone applications that work across platforms. JavaScript, on the other hand, was developed by Netscape as a scripting language similar to a client version of PHP. It cannot create standalone applications; it resides in an internet browser.

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Below is the complete and detailed description of difference between java and JavaScript: 

Java

Java was an excellent idea on paper. It allowed programmers to create a single program and expect it to work with most of the operating systems available. This is achieved by not using the native code of a particular operating system. Instead, Java takes its own code and then runs it on a virtual machine, which interprets the Java code into the native code of the opposite.

As mentioned earlier, it looked fine on paper, but in practice Java programs were significantly slower than programs encoded in native code. This was mainly due to the fact that each code had to be processed twice, by the virtual machine and then by the operating system.

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JavaScript

JavaScript is a scripting language, so it is not compiled. A JavaScript-enabled browser takes the script and processes it, it would then execute the instructions in the script. The main use of JavaScript is to provide web pages that cannot be reached with simple HTML with a high level of interactivity. It can be used in conjunction with other technologies such as AJAX for an even more interactive experience. JavaScript can also interact with elements that do not come from its code, which Java does not. Java applications can only be embedded in HTML pages and from this point on the Java application works independently.

Java and JavaScript are two very different languages, so they also have different requirements in order to function properly. Installing Java support in your browser does not mean that it can also support JavaScript applications and vice versa.

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Major difference between Java and JavaScript

Java and JavaScript may make it seem like one was a direct descendant of the other, but in reality they are far from it. Java is an object-oriented programming language that can run on several operating systems using an interpreter.

It was developed by Sun Microsystems with the aim of creating stand-alone applications that work across platforms. JavaScript, on the other hand, was developed by Netscape as a scripting language similar to a client version of PHP. It cannot create standalone applications; it resides in an internet browser.

Different purposes

JavaScript and Java were developed for very different purposes. While Java is a versatile all-purpose weapon for complex desktop and server applications as well as operating systems (Android!), JavaScript has specialized in web browser applications from the very beginning .

Compiler vs. Interpreter

Java programs have to be compiled before they can be started (ie the Java code has to be translated into binary code). JavaScript, on the other hand, does not require a compiler; the JavaScript source code is executed directly by an interpreter : this is an important characteristic of all scripting languages .

Requirements

In order to develop and run programs in Java, the Java Development Kit (JDK) with the Java Virtual Machine must be installed on the computer . A simple text editor is sufficient for programming in JavaScript and an Internet browser with activated JavaScript plug- in is sufficient to start the programs.

Dependency

Java is a standalone programming language, which means that the Java Virtual Machine means that a Java program is already executable by itself. JavaScript, on the other hand, is part of a website, integrated in HTML and requires a browser.

Object orientation

Objects are used in both Java and JavaScript. The difference is that, unlike Java, there are no classes in JavaScript . This form of object-based programming is known as prototype-based programming . Objects are not created here by instantiating a class, but by cloning existing objects.

Typing

Java uses static typing . This means that the data type of a variable is checked at compile time. The programmer must therefore explicitly specify the data type when declaring variables ( int , double , boolean , ..).

In JavaScript, on the other hand, dynamic typing is used, which means that type safety is checked at runtime. The programmer does not mention the data type in the variable declaration.

Summary

  1. If we consider Java, it is an OOP programming language, while Java Script is an OOP scripting language.
  2. Java creates applications that run in a virtual machine or browser, while JavaScript code runs only in a browser.
  3. Java code must be compiled, while JavaScript code is only contained in text.
  4. You need different plug-ins.

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