The standard naming convention for classes in Java is to write the class name in InitCaps. So a class which denotes the customer sales record should be named CustomerSalesRecord
This format makes the name easily readable. We should be careful to chose a name which clearly describes the purpose of the class. Try to avoid short forms or acronyms unless they are clear enough, or if using the full name makes the class name way too long. What exactly constitutes way too long is an individual choice. I would say over 50 characters is long.