Learn Java Programming

Master Java from basics to advanced topics with concise lessons and practical examples. Follow a structured path inspired by reputable learning resources.

Start Learning Try Java Online

Reference guide: Programiz — Getting Started with Java [0]

Tutorial Contents
Getting Started
Basics
Control Flow
Methods & Arrays
Object-Oriented Programming
Exceptions

Welcome to Java Programming

Java is a powerful, object-oriented programming language used for building cross-platform applications—from mobile apps and web services to enterprise systems. This tutorial walks you through the fundamentals with concise explanations and working code examples.

Why Learn Java?

  • Cross-platform (Write Once, Run Anywhere)
  • Strong OOP model for clean architecture
  • Rich standard library and ecosystem
  • Backed by JVM and mature tooling

Quick Start

  1. Write a class with a main method
  2. Compile with javac and run with java
  3. Use packages to organize larger projects
Hello World in Java
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, Java!");
    }
}

Compile using javac Main.java and run using java Main.

What You Will Learn

  • Syntax, variables, and data types
  • Control flow and loops
  • Methods and arrays
  • Strings and I/O
  • OOP: classes, inheritance, interfaces
  • Exceptions and best practices

Java Tutorial FAQs

How do I run Java online?
Use the Java Online Compiler to write and execute Java directly in your browser—no setup needed. Click "Try Java Online" above to get started.
How do I install Java on Windows?
Download the JDK installer, run it, then set JAVA_HOME and update the Path variable to include the JDK bin directory. Verify with java --version. [0]
How do I install Java on macOS?
Install the appropriate JDK DMG (x64 or ARM64). In your shell profile, set export JAVA_HOME=$(/usr/libexec/java_home) and update PATH to include $JAVA_HOME/bin. Verify with java --version. [0]
Do I need the JDK to compile Java?
Yes. The JDK provides the compiler (javac) and tools needed to build Java applications. For quick tests, the online compiler is a convenient alternative.
What is Java used for?
Java powers cross-platform applications including web services, Android apps, enterprise systems, and tooling built on the JVM. Its strong OOP model and rich libraries make it versatile.

Learn Java the Practical Way

Whether you’re new to programming or expanding your skills, this Java tutorial focuses on hands-on learning. Each topic pairs clear explanations with short, working examples that you can run online. Move from fundamentals—variables, data types, and control flow—to core OOP concepts like classes, inheritance, and interfaces. Along the way, you’ll see idiomatic Java patterns and simple best practices that build confidence.

Why this guide? It’s designed for real-world use: fast to read, easy to try, and friendly on mobile. Bookmark it and return whenever you need a refresher or a quick example.