setup_alternatives.sh

setup_alternatives.sh

# ---------------------------------------------------------------
# If you are setting up a clean (never used) system, you can run this full batch
# Otherwise, I suggest running this line by line (copy/paste).
#
# Show if java, javac, or jar are already setup.  Run these commands before running the rest
#
JDK_VERSION='jdk1.8.0_271'

echo "==============================================================="
echo "Processing Aternatives for "${JDK_VERSION}
echo "==============================================================="
echo "Querying current values"
sudo update-alternatives --query java
sudo update-alternatives --query javac
sudo update-alternatives --query jar
sudo update-alternatives --query keytool
sudo update-alternatives --query jarsigner
#
# Setup alternatives so java, javac, and jar are in the path.  Run what is missing based on above.
#
echo "==============================================================="
echo "Installing current values"
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/${JDK_VERSION}/bin/java 1
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/${JDK_VERSION}/bin/javac 1
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/${JDK_VERSION}/bin/jar 1
sudo update-alternatives --install /usr/bin/keytool keytool /usr/lib/jvm/${JDK_VERSION}/bin/keytool 1
sudo update-alternatives --install /usr/bin/jarsigner jarsigner /usr/lib/jvm/${JDK_VERSION}/bin/jarsigner 1
#
# Visually confirm (that means you) that java, javac, and jar are setup
#
echo "==============================================================="
echo "Querying current values"
sudo update-alternatives --query java
sudo update-alternatives --query javac
sudo update-alternatives --query jar
sudo update-alternatives --query keytool
sudo update-alternatives --query jarsigner
#
# DONE
#