Difference between Java and JavaScript - GeeksforGeeks

26 Nov, 2021
In this article, we will know about Java & Javascript, & also see the significant distinction between Java & Javascript.
JavaScript:JavaScript is a lightweight programming language(“scripting language”) and is used to make web pages interactive. It can insert dynamic text into HTML. JavaScript is also known as the browser’s language. JavaScript(JS) is not similar or related to Java. Both the languages have a C-like syntax and are widely used in client-side and server-side Web applications, but there are few similarities only.
Features of Javascript:
JavaScript was created in the first place for DOM manipulation. Earlier websites were mostly static, after JS was created dynamic Web sites were made.
Functions in JS are objects. They may have properties and methods just like another object. They can be passed as arguments in other functions.
Can handle date and time.
Performs Form Validation although the forms are created using HTML.
No compiler is needed.
Example: This is the basic Javascript example. 
HTML
<script>    console.log("Welcome to GeeksforGeeks Learning");</script>
Output:
Welcome to GeeksforGeeks Learning
Java:Java is an object-oriented programming language and has a virtual machine platform that allows you to create compiled programs that run on nearly every platform. Java promised, “Write Once, Run Anywhere”.
Features of Java:
Platform Independent: Compiler converts source code to bytecode and then the JVM executes the bytecode generated by the compiler. This bytecode can run on any platform.
Object-Oriented Programming Language:  Organizing the program in the terms of collection of objects is a way of object-oriented programming, each of which represents an instance of the class. There are 4 pillars of OOP’s concept:AbstractionEncapsulationInheritancePolymorphism
Abstraction
Encapsulation
Inheritance
Polymorphism
Simple: Java is one of the simple languages as it does not have complex features like pointers, operator overloading, multiple inheritances, Explicit memory allocation.
Robust: Java language is robust that means reliable. It is developed in such a way that it puts a lot of effort into checking errors as early as possible, that is why the java compiler is able to detect even those errors that are not easy to detect by another programming language.
Secure: In java, we don’t have pointers, and so we cannot access out-of-bound arrays i.e it shows ArrayIndexOutOfBound Exception if we try to do so.
Distributed:  We can create distributed applications using the java programming language. Remote Method Invocation and Enterprise Java Beans are used for creating distributed applications in java.
Multithreading: Java supports multithreading. It is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of CPU.
Example: This is the basic Java program.
Java
import java.io.*;  class GFG {    public static void main(String[] args)    {        System.out.println(            "Welcome to GeeksforGeeks Learning");    }}
Output:
Welcome to GeeksforGeeks Learning
Difference between Java and JavaScript:
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