if [ "x$JAVA_OPTS" = "x" ]; then
	J_OPTS=$(cat <<-EOF
	-server					# use the server vm
#	-Xcomp					# precompilation
#	-Xbatch					# precompilation
	-Xss1024k				# stack size for each thread
	-Xms512m				# initial heap size
	-Xmx512m				# maximum heap size
	-XX:MaxPermSize=128m			# permanent generation size
	-XX:NewSize=256m			# young generation size
	-XX:+UseConcMarkSweepGC			# garbage collection behaviour
	-XX:+CMSIncrementalMode			# garbage collection behaviour
	-XX:CMSInitiatingOccupancyFraction=80	# garbage collection behaviour
	-Dsun.rmi.dgc.client.gcInterval=3600000
	-Dsun.rmi.dgc.server.gcInterval=3600000
	EOF
	)
	IFS=$'\n'
	for LINE in $J_OPTS; do
		JAVA_OPTS=$JAVA_OPTS$(echo -n $LINE |
		# remove leading whitespaces
		sed 's/^[ \t]*//' |
		# remove comment lines
		sed '/^[ \t]*#.*$/d' |
		# remove trailing whitespaces and comments
		sed 's/[ \t].*$//' |
		# remove blank lines
		sed '/^$/d' | 
		# add a single space before the parameter
		sed 's/^/ /'
		)
	done
fi
echo $JAVA_OPTS;