Java Tutorial: Learn Java Programming from Beginner to Advanced

Become a Java expert with our comprehensive tutorial. Learn Java programming concepts from scratch, with clear explanations, practical examples, and exercises. This tutorial is perfect for beginners and experienced programmers alike.

Java Tutorial

This Java tutorial has been written for beginners to advanced programmers who are striving to learn Java programming. Numerous practical examples have been provided to explain the concepts in simple and easy steps. This tutorial has been prepared and reviewed by experienced Java programmers at Tutorials Point, ensuring its usefulness for both students and Java developers.

After completing this tutorial, you will find yourself at a moderate level of expertise in Java programming, from where you can elevate yourself to the next levels.

What is Java?

Java is a popular high-level, object-oriented programming language that was originally developed by Sun Microsystems and released in 1995. Currently, Java is owned by Oracle, and more than 3 billion devices run Java. It runs on various platforms like Windows, Mac OS, and the various versions of UNIX. Java is used to develop numerous types of software applications, including desktop apps, mobile apps, web apps, games, and more.

Java follows the principle of "Write Once, Run Anywhere" (WORA), meaning that compiled Java code can run on any platform that supports Java without the need for recompilation.

Java First Example

The first example in Java is to print "Hello, World!" on the screen. Here's a simple Java code to achieve that:

Syntax


public class MyFirstJavaProgram {

/* This is my first Java program.
    * This will print 'Hello, World!' as the output
    */
public static void main(String []args) {
    System.out.println("Hello, World!"); // prints Hello, World!
}
}

Output


Hello, World!

Java Features

Object-Oriented: Everything in Java is an object. It supports OOP principles like inheritance, encapsulation, and polymorphism.
Platform Independent: Java is compiled into platform-neutral byte code, which is executed by the JVM on different platforms.
Easy to Learn: Java inherits features from C and C++, making it easier for developers familiar with those languages to learn Java.
Secure: Java provides automatic memory management and garbage collection, making it safer and more secure.
Multithreading: Java has inbuilt support for multithreading, making it efficient for tasks like concurrent processing.
High Performance: Java uses the Just-In-Time (JIT) compiler, which enhances performance by compiling code at runtime.
Portable: Java code can run on various platforms without modification, making it highly portable.

Java Applications

Java is used in many areas, such as:

Enterprise solutions
Game development
Secure web development
Embedded systems
Mobile application development
Big data applications

Java Platforms (Editions)

There are four editions of Java:

Java SE (Standard Edition): Used for developing desktop and server applications.
Java EE (Enterprise Edition): Used for building web applications.
Java ME (Micro Edition): Used for mobile and embedded applications.
JavaFX: Used for creating lightweight, rich user interfaces.

Java Jobs & Opportunities

Java developers are in high demand, with salaries ranging up to $120,000 annually for professionals with 3-5 years of experience. Companies like Google, Microsoft, Facebook, IBM, Amazon, and many others actively seek Java programmers.

Why Learn Java?

Java is essential for aspiring software developers due to its simplicity, versatility, high demand, and excellent job prospects. Learning Java will open doors to numerous career opportunities, including desktop, mobile, and web application development.

Prerequisites to Learn Java

Before diving into Java, it's assumed that readers have a basic understanding of programming concepts like variables, syntax, and commands. Having experience with any programming environment will also be beneficial.

Learn Java by Examples

This tutorial provides a set of practical Java examples to help you master various concepts.

Getting Started with Java

Start your Java learning journey by understanding the basics, environment setup, and then proceed with the topics provided in this tutorial.