How to Install Java in Ubuntu

Rashmi Patidar Feb 02, 2024

Java Java Installation

Ubuntu is an open-source Operating System based on the Debian for Linux Distribution systems. The powerful OS is available in different versions and is available for free. The system is compatible enough to be installed in a virtual machine.

apt, acronym for Advanced Packaging Tool, is a package library that provides additional functionality. The library can handle software and function downloads; it can even upgrade the existing Ubuntu system. The tool is available as a command and allows the installation and removal of packages.

The steps to install and start Java in the Ubuntu environment are listed below.

Check the existing version of Java present in the system using the java -version command.
If any version is already present, upgrade to the desired version in the apt list. Otherwise, install a new package using the steps.
Use the command apt search openjdk to get the list of available Java packages.
Select the desired version and install using the sudo apt install openjdk-8-jdk command. This function provides the administrative privileges to get the work done in Linux-based systems.
Additionally, if apt does not work, then a tar file can be downloaded manually and extracted using the command.
The command unzips the downloaded file, tar -xvf ~/Downloads/jdk-7u3-linux-i586.tar.gz.
Move the newly created directory to the /usr/lib location using the command sudo mv jdk1.7.0_03/* /usr/lib/jvm.
Once jdk gets successfully installed or placed at the correct location, set the JAVA_HOME environment variable.
Use export command, export JAVA_HOME=/usr/lib/jvm/java-8-openjdk to set the correct Java version in the environment variable.
There can be a possibility of more than one jdk present in the /lib directory. In that case, select the appropriate path of your choice.
Append the JAVA_HOME variable in the PATH environment variable. Use the export PATH=$PATH:$JAVA_HOME/bin command to set the path variable.
At the end, check the version you just installed using the command java -version.

Author: Rashmi Patidar

Rashmi is a professional Software Developer with hands on over varied tech stack. She has been working on Java, Springboot, Microservices, Typescript, MySQL, Graphql and more. She loves to spread knowledge via her writings. She is keen taking up new things and adopt in her career.

How to Install Java in Ubuntu

Check the existing version of Java present in the system using the `java -version` command.

If any version is already present, upgrade to the desired version in the `apt` list. Otherwise, install a new package using the steps.

Use the command `apt search openjdk` to get the list of available Java packages.

Select the desired version and install using the `sudo apt install openjdk-8-jdk` command. This function provides the administrative privileges to get the work done in Linux-based systems.

Additionally, if `apt` does not work, then a `tar` file can be downloaded manually and extracted using the command.

The command unzips the downloaded file, `tar -xvf ~/Downloads/jdk-7u3-linux-i586.tar.gz`.

Move the newly created directory to the `/usr/lib` location using the command `sudo mv jdk1.7.0_03/* /usr/lib/jvm`.

Once `jdk` gets successfully installed or placed at the correct location, set the `JAVA_HOME` environment variable.

Use export command, `export JAVA_HOME=/usr/lib/jvm/java-8-openjdk` to set the correct Java version in the environment variable.

There can be a possibility of more than one `jdk` present in the `/lib` directory. In that case, select the appropriate path of your choice.

Append the `JAVA_HOME` variable in the `PATH` environment variable. Use the `export PATH=$PATH:$JAVA_HOME/bin` command to set the path variable.

At the end, check the version you just installed using the command `java -version`.

Related Article - Java Installation

Check the existing version of Java present in the system using the java -version command.

If any version is already present, upgrade to the desired version in the apt list. Otherwise, install a new package using the steps.

Use the command apt search openjdk to get the list of available Java packages.

Select the desired version and install using the sudo apt install openjdk-8-jdk command. This function provides the administrative privileges to get the work done in Linux-based systems.

Additionally, if apt does not work, then a tar file can be downloaded manually and extracted using the command.

The command unzips the downloaded file, tar -xvf ~/Downloads/jdk-7u3-linux-i586.tar.gz.

Move the newly created directory to the /usr/lib location using the command sudo mv jdk1.7.0_03/* /usr/lib/jvm.

Once jdk gets successfully installed or placed at the correct location, set the JAVA_HOME environment variable.

Use export command, export JAVA_HOME=/usr/lib/jvm/java-8-openjdk to set the correct Java version in the environment variable.

There can be a possibility of more than one jdk present in the /lib directory. In that case, select the appropriate path of your choice.

Append the JAVA_HOME variable in the PATH environment variable. Use the export PATH=$PATH:$JAVA_HOME/bin command to set the path variable.

At the end, check the version you just installed using the command java -version.