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set and get methods

• A class’s private fields can be manipulated only by the class’s methods.
• A client of an object calls the class’s public methods to manipulate the private fields of an object of the class.
• Classes often provide public methods to allow clients to set (i.e., assign values to) or get (i.e., obtain the values of) private instance variables.
• The names of these methods need not begin with set or get, but this naming convention is recommended.