if [[ "x$ANDROID_JAVA_HOME" != x && -e $ANDROID_JAVA_HOME/lib/tools.jar ]] ; then
echo $ANDROID_JAVA_HOME/lib/tools.jar
else
JAVAC=$(which javac)
while [ -L $JAVAC ] ; do
LSLINE=$(ls -l $JAVAC)
JAVAC=$(echo -n $LSLINE | sed -e "s/.* -> //")
done
echo $JAVAC | sed -e "s:\(.*\)/bin/javac.*:\\1/lib/tools.jar:"
fi