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Complete Java Tutorial

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

What is Java?

Developed by Sun Microsystems in 1995, Java is a highly popular, object-oriented programming language. This platform independent programming language is utilized for Android development, web development, artificial intelligence, cloud applications, and much more.

In this tutorial, we will cover everything from the basics of Java syntax to advanced topics like object-oriented programming and exception handling. So, by the end of this tutorial, you will have a strong understanding of Java and be ready to start writing your own Java applications. So let’s get started on this comprehensive Java programming tutorial!

Java Online Compiler

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

Output:

Hello World

Java Programming Related Resources

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Overview of Java

Basics of Java

Input/Output in Java

Flow Control in Java

Operators in Java

Strings in Java

Arrays in Java

OOPS in Java

Inheritance in Java

Abstraction in Java

Encapsulation in Java

Polymorphism in Java

Constructors in Java

Methods in Java

Interfaces in Java

Wrapper Classes in Java

Keywords in Java

Access Modifiers in Java

Memory Allocation in Java

Classes of Java

Packages in Java

Collection Framework in Java

List in Java

Queue in Java

Map in Java

Set in Java

Exception Handling in Java

Multithreading in Java

Synchronization in Java

File Handling in Java

Java Regex

Java IO

Java Networking

Java SE 8 Features

Java Date & Time

Java JDBC

Java Miscellaneous

Interview Questions on Java

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

Here in this section, we have added some of the applications that were developed using the Java programming language.

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

Prerequisites to Learn Java

Well, in this article, we have linked all our best resources to teach you the core of the Java programming language in easy and simple way. But before diving into the world of Java programming it is expected that readers are familiar with the fundamentals of any programming language. So that he/she can easily understand variables, instructions, syntax, and other terms.

Java Jobs & Opportunity

According to report of Statista.com Java is most demanded programming languages after JavaScript by recruiters worldwide in 2023. Major MNC companies are recruiting Java Programmers.

Java Programing Language Quiz

Quizzes on Java Language

Java Programming Tutorial: FAQ

Q1. 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.

Q2. What are the major concepts in Java?

There are 4 major concept in Java that is abstraction, encapsulation, polymorphism, and inheritance. Along with this Java also works with three OOPs concept

Q3. How Java different to C++ ?

C++	JAVA
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.

Q4. Why Java is so popular programming language?

Java is based on object model hence it is one the popular programming language.

Q5. What are the scope of Java Technologies for Web Applications?

Java Technologies for Web Applications are a set of Java-based technologies that are used to develop web applications. These technologies include:

Java Servlet API
JavaServer Pages
JavaServer Faces
Enterprise JavaBeans
JDBC (Java Database Connectivity)
Java Messaging Service (JMS):
JavaMail API:
JAX-WS

Last Updated : 22 Nov, 2023

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