Parameters - Pass by Value
In Java methods, arguments are passed by value.
When invoked, the method receives the value of the variable passed in.
When the argument is of primitive type, pass-by-value means
that the method cannot change its value.
When the argument is of reference type, pass-by-value means
that the method cannot change the object reference, but can invoke
the object's methods and modify the accessible variables within
the object.
Note
A copy of the value of the variable is make
avaiable to the method; changes to the copy do not affect the
origninal value in the calling method.
Article: Cup Size -- a story about variables
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