D.5. Notes on Declaring and Using Methods
There are three ways to call a method:
1. Using a method name by itself to call another method of the same class—such as maximum(number1, number2, number3)
in line 21 of Fig. D.2.
2. Using a variable that contains a reference to an object, followed by a dot (.
) and the method name to call a non-static
method of the referenced object—such as the method call in line 13 of Fig. C.3, myGradeBook.displayMessage()
, which calls a method of class GradeBook
from the main
method of GradeBookTest
.
3. Using the class name and a dot (.
) to call a static
method of a class—such as Math.sqrt(900.0)
in Section D.3.
A static
method can call only other static
methods of the same class directly (i.e., using the method name ...
Get Android™ How to Program, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.