Use the update-alternatives utility to change the default version: sudo update-alternatives -config java
If your Pi has numerous Java versions loaded, use the java -version command to see which one is the default: java -version This is what the final product should look like: openjdk version "1.8.0_212" OpenJDK Runtime Environment (build 1.8.0_212-8u212-b01-1+rpi1-b01) OpenJDK Client VM (build 25.212-b01, mixed mode) Print the Java version to confirm the installation: Install Java 8 if your programme requires it by typing: sudo apt updatesudo apt install openjdk-8-jdk The previous Java LTS version 8, which was released in 2008, is still maintained and widely used. You have now successfully installed Java on your Raspberry Pi and are ready to use it. This is what the final product should look like: openjdk version "11.0.5" OpenJDK Runtime Environment (build 11.0.5+10-post-Raspbian-1deb10u1) OpenJDK Server VM (build 11.0.5+10-post-Raspbian-1deb10u1, mixed mode) Verify that the installation is complete by looking at the Java version: java -version To install the OpenJDK 11 JDK on your Raspberry Pi, do the following commands: sudo apt updatesudo apt install default-jdk OpenJDK 11 is the default Java development and runtime on the newest Raspbian OS, which is based on Debian 10, Buster. Installing Java 11 on a Raspberry Pi is a simple process. Some Java-based apps may require a specific version of Java, so check the programme documentation for more information. If you're not sure which Java package to install, the default OpenJDK (JDK 11) version is a good place to start. UHF HAT for Raspberry Pi - Launching Soon!
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