Java Language -- Types of Classes - I

• Possible ClassModifiers are:

  • abstract -- Contains abstract methods without implementation -- typically such abstract classes have several subclasses that define implementation of methods
  • public -- May be used by code outside the class package and (unix) file must be called ClassName.java where ClassName is unique public class in file
  • private -- this class can only be used within current file friendly(i.e. empty ClassModifier) -- class can be used only within current package
  • protected -- Only accessible to subclasses

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