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paulwellnerbou/switch-java.sh

Last active November 8, 2017 07:58
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Shell script switching between two Java versions, including JAVA_HOME (which is not handled by update-alternatives)
Raw
switch-java.sh
#!/bin/bash
set -u
JAVA7="/opt/jdk1.7.0_80"
JAVA8="/opt/jdk1.8.0_31"
# Assuming you have $JAVA_SYMLINK/bin in your path, in this case "/opt/jdk/bin"
JAVA_SYMLINK="/opt/jdk"
NEW_JAVA=$JAVA7
current=`readlink $JAVA_SYMLINK`
echo $current
if [ "$current" == "$JAVA7" ]; then
NEW_JAVA=$JAVA8
fi
echo "$current -> $NEW_JAVA"
unlink $JAVA_SYMLINK
ln -s $NEW_JAVA $JAVA_SYMLINK
java -version
which java
echo $JAVA_HOME
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