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.
Reference guide: Programiz — Getting Started with Java [0]
Classes and Objects
Encapsulate data and behavior inside classes. Create objects to use them.
class Person {
String name;
Person(String name) { this.name = name; }
void greet() { System.out.println("Hello, " + name); }
}
public class Main {
public static void main(String[] args) {
Person p = new Person("Sam");
p.greet();
}
}- Use access modifiers (
private,public,protected) to encapsulate state. - Create getters/setters for controlled access; consider immutability where appropriate.
thisrefers to the current object and disambiguates shadowed names.- Static fields/methods belong to the class; instance members belong to objects.
Java Tutorial FAQs
How do I run Java online?
How do I install Java on Windows?
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?
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?
javac) and tools needed to build Java applications. For quick tests, the online compiler is a convenient alternative.What is Java used for?
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.