How to Install Java in Ubuntu Using Terminal

Java is a popular programming language that is used for a variety of applications across different platforms. If you are an Ubuntu user and need to install Java on your system, you can do so easily using the terminal. Follow these steps to install Java on Ubuntu:

Step 1: Update Package Index

Before installing Java, it is recommended to update the package index using the following command:

sudo apt update

Step 2: Install Default Java Development Kit (JDK)

To install the default JDK package, which includes the Java Runtime Environment (JRE), use the following command:

sudo apt install default-jdk

After the installation is complete, you can verify it by checking the Java version:

java -version

Step 3: Set Java Environment Variables

It is essential to set the JAVA_HOME environment variable to point to the installation directory of Java. You can do this by editing the ~/.bashrc file:

export JAVA_HOME=/usr/lib/jvm/default-java

After saving the changes, load the new environment variables using the command:

source ~/.bashrc

Step 4: Verify Java Installation

Finally, verify the Java installation by running the following command:

echo $JAVA_HOME

If the output displays the path to the Java installation directory, it means Java has been successfully installed on your Ubuntu system.

You have now successfully installed Java on your Ubuntu system using the terminal. Enjoy coding in Java on your Ubuntu machine!