Learning classes and objects, but feeling very abstract, not fully understood. A class is a collection of objects that have the same properties and behaviors. The class, feeling understood, but the object of the declaration, although it will be used, but still feel very strange. Learning to initialize objects with constructors requires a number of exercises. It's not easy to figure out. Learn to construct and initialize an object with a constructor (constructor). Format: New constructor name (parameter). Change method: A method for modifying instance fields in a class, Typically, the change method name prefix is set. Change method: A method that modifies an instance field in a class, usually with a modifier method name prefixed with set. Accessor method: A method that accesses an instance field in a class, usually a accessor method name prefix is GET, For example, the GetTime method of the GregorianCalendar class, which is used to get the point in time represented by the Calendar object. Also: classes include properties and methods two parts. Familiar with the use of static and static methods. But it was a little hard to get started.
201671010131 2016-2017-2 "Java programming" a difficult journey.
