Now, you can check the installed version using the following command: $ Java -version Install Java 8 JDK
The above command will install the default version of Java JDK-11 on your system. If Java is not installed on your system then use the following command to install the Java JDK. If Java is already installed on your system, then the following output will be displayed on your terminal window:īy default, Ubuntu 20.04 includes the Java 11 JDK. Now, check that Java is installed on your system or not using the following command: $ Java -version To start the installation of Java on Ubuntu 20.04 first, you need to update the apt repository on your system using the following command: $ sudo apt update Open the terminal on your system using ‘Ctrl + Alt+ t’ or through the application search bar as follows: All commands and steps in this article are performed on the Ubuntu 20.04 Linux system listed below. This article shows how to install Java 8 and Java 11 JDK and JRE on Ubuntu 20.04 using the terminal and how to switch between these two versions. Java is open source and has two flavors: the JDK (Java Development Kit), which is required if you want to develop Java applications, and the JRE (Java Runtime Environment), which is used to run Java applications and does not include compilers and development tools. Java applications are also used on game consoles and cell phones, for example, the Android operating system uses Java as an app programming language. It can be used to create server and desktop applications, and Java runs on almost all operating systems, including Mac OS, Windows, and Linux. Java is the most widely used programming language.
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