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How to Install Java on Ubuntu 20.04 LTS Linux

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There are a few different ways to install Java on Ubuntu 20.04 LTS, but the most common way is to use the package manager. Here's how you can do it:

  1. First, update your package lists by running the command "sudo apt update"
  2. Next, you can install the default OpenJDK package by running the command "sudo apt install default-jdk"
  3. This will install the default version of OpenJDK on your system, which is currently OpenJDK 11.
rnAlternatively, if you want to install a specific version of OpenJDK, you can use the following command:

sudo apt install openjdk-X-jdk

Where X is the version number you want to install, for example, openjdk-8-jdk for OpenJDK 8.

  1. Once the installation is complete, you can check that Java is installed and check the version by running the command "java -version"
rnYou can also install Java from the Oracle website by downloading the .tar.gz file and then install it manually.

It's important to note that on Ubuntu 20.04 LTS, OpenJDK is the default Java Development Kit (JDK) package, and it's fully compatible with the Java SE standard and most Java applications. But you can also choose to install Oracle JDK package, but it's not free, you will need to purchase a license.

You should also note that Java is a memory-intensive application, so it's recommended to have enough RAM and a good amount of free disk space to run Java applications.

Once you have installed Java, you can set the JAVA_HOME environment variable and include it in your PATH variable. You can also use update-alternatives command to switch between different version of Java installed on your system.