Oracle JDK 11 Kubuntu 18.04 Installation - Setup
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4. Setting Up Oracle JDK 11
Now to Install JDK 11 into System
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-11/bin/java 1065
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-11/bin/javac 1065
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-11/bin/jar 1065
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