This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
My java program has to import certain classes in a JAR file. I have imported the jar file. I was able to refer to the methods of all the classes in the JAR file except the files which have "$" symbol in their name (Ex: xml$BOAppInfo.class). What are these class files and how can I refer to the methods in these class files.
if you define a class INSIDE another class, you get what's called, appropriatly, an inner class. These are what you are seeing with the dollar sign. you may want to check out the campfire article on Inner Classes
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors