File list:
regular expression
.................\aboutFile.java
.................\ArrayStack.java
.................\arrow.jpg
.................\baby.gif
.................\discussion.java
.................\exitApps.java
.................\fromInfix.java
.................\fromPost.java
.................\fromPre.java
.................\howToUse.java
.................\index.java
.................\infixToPostfix.java
.................\infixToPrefix.java
.................\javalogo.gif
.................\postfixConverter.java
.................\prefixConverter.java
.................\progressbar.jpg
.................\Project.java
.................\stack.java
