Downgrade Java on openSUSE Linux

This is the procedure when you want to downgrade the Java version on openSUSE Linux. In this example, we will downgrade from Java 11 to Java 8.

Implementation environment

openSUSE Leap 15.1

Check the installed packages

$ sudo zypper search -i java

S  |name|Overview|type
---+--------------------------------+---------------------------------------+-----------
i  | antlr-java                     |Another tool for language recognition(->   |package
i+ | devel_java                     |Java development|pattern
i  | java-11-openjdk                | OpenJDK 11 Runtime Environment        |package
i  | java-11-openjdk-devel          | OpenJDK 11 Development Environment    |package
i  | java-11-openjdk-headless       | OpenJDK 11 Runtime Environment        |package

Removed version 11 packages from the above list

$ sudo zypper remove -y java-11-openjdk java-11-openjdk-devel java-11-openjdk-headless

Install Version 8 package

$ sudo zypper install -y java-1_8_0-openjdk java-1_8_0-openjdk-devel java-1_8_0-openjdk-plugin

Check the installed version

$ java -version
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (IcedTea 3.15.0) (build 1.8.0_242-b08 suse-lp151.2.9.1-x86_64)
OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)

You have successfully downgraded to Java 8.

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