How to Install Java on Ubuntu 24.04 LTS (2024)

How to Install Java on Ubuntu 24.04 LTS with JAVA_HOME
Description:
Installing Java on Ubuntu 24.04 LTS and setting the JAVA_HOME environment variable is essential for running Java applications and development. This guide will take you through the entire process step by step, ensuring a smooth installation and configuration.
*Step-by-Step Guide:*
*Step 1: Update the Package Index*
Before installing any software, it's a good practice to update the package index. Open a terminal and run the following command:
```bash
sudo apt update
```
*Step 2: Install Java Development Kit (JDK)*
Ubuntu offers multiple versions of JDK. You can choose the version you need. In this guide, we will install OpenJDK 17, which is a commonly used version:
```bash
sudo apt install openjdk-17-jdk
```
To install a different version, replace `openjdk-17-jdk` with the version you prefer, such as `openjdk-11-jdk`.
*Step 3: Verify the Installation*
After the installation is complete, verify that Java is installed correctly by checking the version:
```bash
java -version
```
You should see an output indicating the version of Java that is installed.
*Step 4: Set JAVA_HOME Environment Variable*
Setting the JAVA_HOME environment variable is important for running Java applications that require this variable to be set.
1. *Find the Java Installation Path*
To find out where Java is installed, use the `update-alternatives` command:
```bash
sudo update-alternatives --config java
```
This command will list all installed versions of Java and their paths. Copy the path of the Java version you want to set as JAVA_HOME.
2. *Edit the Environment File*
Open the environment file in a text editor:
```bash
sudo nano /etc/environment
```
Add the following line at the end of the file, replacing `/usr/lib/jvm/java-17-openjdk-amd64` with the path you copied:
```bash
JAVA_HOME="/usr/lib/jvm/java-17-openjdk-amd64"
```
3. *Load the New Environment Variables*
To apply the changes, either restart your system or run the following command:
```bash
source /etc/environment
```
4. *Verify JAVA_HOME*
To verify that the JAVA_HOME environment variable is set correctly, run:
```bash
echo $JAVA_HOME
```
This command should output the path to your Java installation.
*Step 5: Update .bashrc (Optional)*
If you want to set JAVA_HOME for a specific user rather than system-wide, you can add the environment variable to the user's `.bashrc` file:
1. Open the `.bashrc` file in a text editor:
```bash
nano ~/.bashrc
```
2. Add the following lines at the end of the file, replacing `/usr/lib/jvm/java-17-openjdk-amd64` with the appropriate path:
```bash
export JAVA_HOME="/usr/lib/jvm/java-17-openjdk-amd64"
export PATH=$PATH:$JAVA_HOME/bin
```
3. Apply the changes:
```bash
source ~/.bashrc
```
*Conclusion:*
Congratulations! You have successfully installed Java on Ubuntu 24.04 LTS and set the JAVA_HOME environment variable. You are now ready to run Java applications and start Java development on your system.
Don't forget to like, share, and subscribe for more tech tutorials and tips!
#Java #Ubuntu #Ubuntu24.04 #JavaInstallation #JAVA_HOME #OpenJDK #Linux #TechTutorial #HowTo #Programming #JavaDevelopment #TechTips #LinuxTutorial