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Video of How To Install Java On Ubuntu 24.04 LTS (Linux) (2025) in Java course by ProgrammingKnowledge channel, video No. 131 free certified online
How To Install Java on Ubuntu 24.04 LTS (Linux) Step-by-Step Java Setup Guide
Need to set up Java on your Ubuntu 24.04 LTS system? In this step-by-step tutorial, we’ll show you how to install Java (JDK) on Ubuntu 24.04—whether you're a developer preparing to build Java apps or simply need Java for running software.
We’ll cover how to install both OpenJDK and Oracle JDK, and how to set the default Java version if multiple versions are installed. Whether you're new to Linux or a seasoned Ubuntu user, this guide will help you get Java up and running in just a few minutes.
What You’ll Learn:
Installing OpenJDK 21 (default in Ubuntu 24.04)
Installing Oracle JDK manually (optional)
Verifying the Java installation
Setting JAVA\_HOME and environment variables
Switching between multiple Java versions
Commands Covered:
```bash
sudo apt update
sudo apt install default-jdk
java -version
javac -version
```
To install a specific version like OpenJDK 17 or 21:
```bash
sudo apt install openjdk-17-jdk
sudo apt install openjdk-21-jdk
```
To switch between versions:
```bash
sudo update-alternatives --config java
sudo update-alternatives --config javac
```
Set `JAVA_HOME`:
```bash
sudo nano /etc/environment
# Add: JAVA_HOME"/usr/lib/jvm/java-17-openjdk-amd64"
source /etc/environment
echo $JAVA_HOME
```
Why Install Java?
Run Java-based applications like IntelliJ IDEA, Eclipse, Minecraft servers, etc.
Compile and run Java code for development or production
Build Android or enterprise applications with tools like Gradle, Maven, and Spring
Works On:
Ubuntu 24.04 LTS
Debian-based distros
Compatible with Java apps, IDEs, and tools
Drop your questions or issues in the comments—we’ll help you out!
Don’t forget to like, share, and subscribe for more Ubuntu, Java, and Linux tutorials!
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