I apologize for not being able to show you how the applet will work. It needs the supporting class files. If you were really sharing this on the web, you would bundle all the class files together in a JAR file so there would be only one thing to download. You're going to be running this in the directory where all those files exist, so JAR files are a non-issue. If you want to show it to your friends and family, do what I did and copy the whole directory to a web accessible location, delete the .java files, and load it. One of the Token files will have a weird name. You can play with the working applet at: http://cs.millersville.edu/~katz/cs162/examples/postfix/PostfixEvaluation.html Or go to the course examples, click on Classroom Examples, and go to postfix. Just in time for our class to be over, Todd got the network and PC server up and running again. Oh well.