I am new to writing ant targets. I've to pass 3 arguments from the command line to java program. All these can be optional and can have spaces. How can i do that using ant target. I tried using but if it delimits the arguments by space. So, if my first argument has space then it takes the word after space as second argument. I also tried using It takes spaces but makes the arguments mandatory. Im my java code, i've to set default values for these arguments if any of these is missing. How can i do that.