Learn how to install Java, configure environment variables, and verify setup on Windows, Mac, and Linux with this complete Java installation guide.
Introduction to Java Installation
Java is one of the most widely used programming languages in the world. Whether you are a beginner learning programming for the first time or a professional working on enterprise-level applications, you need Java installed on your system to run, compile, and develop Java-based applications. In this detailed Java installation guide, we will cover everything you need to know about installing Java across different platforms in 2025.
From installing JDK step by step to configuring Java environment variables, this tutorial will help you set up Java smoothly on Windows, macOS, and Linux. By the end of this Java setup tutorial, you’ll be able to verify Java installation successfully and start writing Java programs on your machine.
For a practical video walkthrough, check out this tutorial: Core Java Tutorial 01 : Understanding Java, Setup & Real-World Applica…
Why Do You Need Java Installed?
Before moving into the installation steps, let’s understand why setting up Java is necessary.
Run Java Programs: Without Java installed, your system cannot compile or execute Java code.
Application Development: Most enterprise and web applications still rely on Java.
Tools Dependency: Popular tools like Apache Maven, Gradle, Hadoop, and Tomcat require Java.
Cross-Platform Support: Java works seamlessly on Windows, macOS, and Linux.
If you are a student, software developer, or IT professional, knowing how to set up Java on Windows, Mac, or Linux is an essential skill.
Step 1: Download Java JDK
The first step in the Java setup for beginners is downloading the latest Java Development Kit (JDK). As of 2025, JDK 17 and JDK 21 (LTS versions) are widely used.
Where to Download JDK:
Official Oracle JDK: Oracle Downloads
OpenJDK: OpenJDK Downloads
Adoptium Temurin: A popular community-driven JDK distribution.
When downloading, make sure to select the version specific to your operating system:
Windows: download JDK for Windows
macOS: Java setup on macOS
Linux: Java installation Linux (or install Java on Ubuntu)
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