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What is a class file with $ symbol in the name

 
Greenhorn
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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.
 
Ranch Hand
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inner classes
 
lowercase baba
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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
 
Don't get me started about those stupid light bulbs.
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