Java Tutorial | Learn Java Programming

Complete Java Tutorial

This Java programming tutorial is designed for beginners as well experienced professionals. Whether you’re looking to learn the basics of Java or its advanced concepts, our Java tutorial is the perfect resource for you.

What is Java?

Java is a most popular, object-oriented, widely used programming language and platform that is utilized for Android development, web development, artificial intelligence, cloud applications, and much more. So, mastering this gives you great opportunities in bigger organizations.

Simple Hello World Program :

// A Java program to print "Hello World" 
public class GFG { 
    public static void main(String args[]) 
        System.out.println("Hello World"); 


Hello World

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Java Programs – Basics to Advanced


Features of Java

Java is one of the most popular and widely used programming languages.

  • Java has been one of the most popular programming languages for many years.
  • Java is Object Oriented. However, it is not considered as pure object-oriented as it provides support for primitive data types (like int, char, etc)
  • The Java codes are first compiled into byte code (machine-independent code). Then the byte code runs on Java Virtual Machine (JVM) regardless of the underlying architecture.
  • Java syntax is similar to C/C++. But Java does not provide low-level programming functionalities like pointers. Also, Java codes are always written in the form of classes and objects.
  • Java is used in all kinds of applications like Mobile Applications (Android is Java-based), desktop applications, web applications, client-server applications, enterprise applications, and many more.
  • When compared with C++, Java codes are generally more maintainable because Java does not allow many things which may lead to bad/inefficient programming if used incorrectly. For example, non-primitives are always references in Java. So we cannot pass large objects (like we can do in C++) to functions, we always pass references in Java. One more example, since there are no pointers, bad memory access is also not possible.
  • When compared with Python, Java kind of fits between C++ and Python. The programs are written in Java typically run faster than corresponding Python programs and slower than C++. Like C++, Java does static type checking, but Python does not.

Applications of Java

  • Mobile Applications
  • Desktop GUI Applications
  • Artificial intelligence
  • Scientific Applications
  • Cloud Applications
  • Embedded Systems
  • Gaming Applications

Frequently Asked Questions on Java

Q.1 Why use Java ?

-Java is simple to learn programming language because doesn’t contain concepts like : Pointers and operator overloading and it is secure and portable.

Q.2 How Java different to C++ ?

C++ is platform dependent. Java is platform independent.
C++ uses compiler only. Java uses compiler and interpreter both.
C++ support pointers and operator overloading. Java doesn’t support pointers and operator overloading concept.
C++ not support multithreading concept. Java supports multithreading concept.

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