ID: I202604161501
Status: idea
Tags: Ubuntu

installing java 8 ubuntu

Steps Performed

Checked current Java version

java -version

System was using OpenJDK 21.

Installed OpenJDK 8

sudo apt update
sudo apt install openjdk-8-jdk

Successfully installed openjdk-8-jdk and related packages.

Verified installation

ls /usr/lib/jvm/ | grep java-8

Confirmed the presence of java-8-openjdk-amd64.

Switched default Java version

sudo update-alternatives --config java

Selected option 3 → /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

Switched default Java compiler

sudo update-alternatives --config javac

Selected option 3 → /usr/lib/jvm/java-8-openjdk-amd64/bin/javac

Verified new Java version

java -version

Confirmed OpenJDK 1.8.0_482 is now the active version.

Result

Java 8 is now installed and configured as the default JDK and JRE on the system.

References