Learn JAVA with Real Code Examples

Updated Nov 17, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Installation Setup

Install JDK (17+ recommended)

Set JAVA_HOME environment variable

Install Maven or Gradle

Install IDE (IntelliJ/Eclipse)

Environment Setup

Install JDK

Install Maven/Gradle

Install IntelliJ IDEA

Setup environment variables

Config Files

pom.xml

build.gradle

application.properties/yaml

module-info.java

Cli Commands

javac Main.java

java Main

mvn clean install

gradle build

Internationalization

ResourceBundle files

Locale-aware APIs

Spring Boot i18n support

UTF-8 encoded properties

Accessibility

JavaFX accessibility APIs

Android accessibility services

Internationalization with Resource Bundles

Semantic UI frameworks

Ui Styling

JavaFX for desktop UI

Android XML UI

Vaadin for web UIs

Thymeleaf templates

State Management

Singleton services

Spring Beans as managed state

Database persistence via JPA

Caching via Redis/Ehcache

Data Management

JPA/Hibernate ORM

JDBC for direct SQL

Spring Data Repositories

NoSQL integrations