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# Download JDK package sudo rm -rf jdk* curl -s https://download.java.net/java/GA/jdk12.0.2/e482c34c86bd4bf8b56c0b35558996b9/10/GPL/openjdk-12.0.2_linux-x64_bin.tar.gz | tar -zx [ ! -d jdk-12.0.2/bin ] && exit 1 # Prepare installation folder sudo mkdir -p /usr/java [ -d /usr/java/jdk-12.0.2 ] && sudo rm -rf /usr/java/jdk-12.0.2 # Move JDK files to installation folder sudo mv -f jdk-12.0.2 /usr/java [ ! -d /usr/java/jdk-12.0.2/bin ] && exit 1 # Make /usr/java/default symlink to installation folder for convenience sudo rm -f /usr/java/default sudo ln -sf /usr/java/jdk-12.0.2 /usr/java/default # Make the necessary symlinks sudo update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk-12.0.2/bin/java" 1 sudo update-alternatives --install "/usr/bin/jstack" "jstack" "/usr/java/jdk-12.0.2/bin/jstack" 1 sudo update-alternatives --install "/usr/bin/jcmd" "jcmd" "/usr/java/jdk-12.0.2/bin/jcmd" 1 sudo update-alternatives --install "/usr/bin/jmap" "jmap" "/usr/java/jdk-12.0.2/bin/jmap" 1 sudo update-alternatives --set "java" "/usr/java/jdk-12.0.2/bin/java" sudo update-alternatives --set "jstack" "/usr/java/jdk-12.0.2/bin/jstack" sudo update-alternatives --set "jcmd" "/usr/java/jdk-12.0.2/bin/jcmd" sudo update-alternatives --set "jmap" "/usr/java/jdk-12.0.2/bin/jmap" |
Installation checking
To check JDK installation use the following command
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