What is Java

Java is a cross-platform, high-level programming language developed by Sun Microsystems. It is an object-oriented programming language similar to C++, but with simplified and advanced features. Bytecode of Java can run on any of the devices with JVM, this is why Java is known as a “write once, run anywhere” language.


Initially, in 1991 James Gosling, with other team members, started developing Java and named this language Oak. Later it was called Coffee in 1993. From 1996 onwards, it is called Java.

Applications of Java:

  • Android: Applications are either written in Java or use Java API.

  • Banking: To deal with transaction management.

  • Gaming: Java is used to creating mobile games.

  • Retail: Billing applications that you can see in any retail store are entirely written in Java.

Features of Java:

  • Simple: Java has made our life easier by removing all complexities such as pointers, operator overloading, as you see in C++ or any other language.

  • Secure: Java enables the development of virus-free, tamper-free systems.

  • Object-oriented: Java is based on an object model. Everything is an object in Java.

  • Platform independent: Application written on one platform can be easily ported to any other platform.

  • Robust: Robust means here the sense of strong; here, Java is powerful because: It uses strong memory management.

  • Portable: As Java is platform-independent, It can be ported from one platform to another platform.

  • Interpreted: The byte-code runs on JVM, which is usually a software-based Interpreter.

  • Multithreaded: A Java program can have many different threads executing independently and continuously.

  • Architecture-neutral: Compiler will generate an architecture-neutral object file (byte-code).

  • Distributed: By using Java, we can access files by calling any machine methods on the internet. Java facilitates the users to create distributed applications.

  • High-performance: Java is faster than other interpreted programming languages.

  • Concurrent: We can work with many threads to achieve parallel processing or concurrency in a Java application.

  • Class-based: Java is a class-based object-oriented programming language.

  • Network-savvy: Java Networking is a notion of connecting two or more computing devices to share the resources.

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