javai.sh

# Dave Thomas Oct 2015

# I've added this function to my ~/.bash_profile
# It allows for quick one liner tests of java code from the command line

# Usage example:
# javai 'System.out.println("Hello, World!");'
# 
# Second param can be import statements
# Eg:
# javai 'System.out.println(new Date().toString());' 'import java.util.Date;'

#
# Code is run inside static main function. 
#

function javai {

	if [ -z "$1" ]
		then echo "Please pass some java code as the first parameter"
		return
	fi

	TEMP_CLASS_NAME="JAVAI_$$_$(date +'%y%d%m%s')"
	TEMP_FILE="/tmp/$TEMP_CLASS_NAME.java"

	echo "/* Auto Gen javai File */" > $TEMP_FILE

	if [ -n "$2" ]
		then echo "$2" >> $TEMP_FILE
	fi

	echo "public class $TEMP_CLASS_NAME \
{ public static void main(String[] args) { $1 } }" >> $TEMP_FILE

	javac $TEMP_FILE
	cd /tmp
	java $TEMP_CLASS_NAME
	cd - > /dev/null

	rm -rf $TEMP_FILE
	rm -rf "/tmp/$TEMP_CLASS_NAME.class"
}