Basic HTML version of Foils prepared May 12 1996

Foil 58 Java Language -- Methods

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


MethodModifier ReturnType Name(argType1 arg1, ......)
Returntypes are either simple types (int, byte etc.), arrays or class names
Possible MethodModifiers are:
  • public -- This method is accessible by all methods inside and outside class
  • protected -- This method is only accessible by a subclass
  • private -- This method is only accessible to other methods in this class
  • friendly(i.e. empty) -- This method is accessible by methods in classes that are in same package
  • final -- a method that cannot be overriden
  • static -- This method is shared by ALL instances of this class and can be invoked with <Class>.method syntax as well as <Instance>.method
  • synchronized -- This method locks object on entry and unlocks it on exit. If the object is already locked, the method waits until the lock is released before executing
  • native -- to declare methods implemented in a platform -- dependent language, e.g. C.



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