Making a class's instance variables public and its methods private and accessing those instance variables only through the class's methods and properties facilitates debugging,because problems with data manipulations are localized to the methods (and properties).

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Actually,making a class's instance variables private and its methods public and accessing those instance variables only through the class's methods and properties facilitates debugging,because problems with data manipulations are localized to the methods (and properties).

Making a Class's Instance Variables Public and Its Methods Private