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if command -v java >/dev/null 2>&1 && [ "$(java -version 2>&1)" != "" ] && [ "$(java -version 2>&1)" != "bash: java: command not found" ] && [ "$(java -version 2>&1)" != *"11."* ]
then
    sudo update-alternatives --remove-all java
    sudo update-alternatives --remove-all javac
    sudo rm -rf /usr/lib/jvm/jdk1.8*
fi