Basic HTML version of Foils prepared May 12 1996

Foil 57 Java Language -- Types of Classes

From CRPC Lectures on Java Language Applets Graphics CRPC Annual Meeting Tutorial -- May 14,1996. by Geoffrey C. Fox


Possible ClassModifiers are:
abstract -- Contains abstract methods without implementation -- typically such abstract classes have several subclasses that define implementation of methods
final -- Cannot have a subclass
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
synchronizable -- Instances of this class will not have accesses interrupted by any other threads running in parallel



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