#Java se development kit 8 tutorial how to
#Java se development kit 8 tutorial install
#Java se development kit 8 tutorial update

JRE is mostly included in the Java JDK package. It helps to run almost all Java applications on your system. JRE is also known as the Java Runtime Environment. After setting that you can check the default Java version set on your system. Enter the number which you want to keep as a default Java version and press Enter.

The prompt will display on the terminal that will ask you to enter the choice number which Java version you want to set as default. The list of installed Java versions is presented in the terminal window. You will see the following output on your system: Now, to change the default Java version using the update-alternatives command as follows: $ sudo update-alternatives -config java If multiple Java versions are installed on your system Ubuntu 20.04, then you can check the default Java version using the command as follows: $ Java -version So, after that you can Java version using the following command: $ Java -version Set the default Java version on Ubuntu 20.04

#Java se development kit 8 tutorial install

Some older java applications might require the previous Java version If your application requires the JDK-8 version then you can install it using the following command: $ sudo apt install openjdk-8-jdkĪfter executing the above command, the Java JDK-8 installation will begin on your system and it will take some time to complete the installation process. 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

#Java se development kit 8 tutorial update

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.

#Java se development kit 8 tutorial how to

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.