I. Object: It can be seen as an object, and divided into a thinking object (object) and a real object (object). Thinking object refers to the object we imagine or assume it in the brain, it does not exist in real space; and real objects refer to objects that actually present in our living space at that time, it is visible. For example, a book, a table can be seen as an object, if this book is visible, then this book is real object, and it is the thinking object.
II. The properties of the object: refers to the characteristics of the object itself. Since the object can be seen as an object, then this object itself has the color, shape, size, name, location, etc. of this object, can be seen as the properties of this object. Some of the properties of the object can be changed, and some cannot be changed (read-only properties). For example, I thrown a book from the table, then the location attribute of this book has changed, but the contents of the materials and books that make this book are not changed (read-only attribute) .
3. Method of object: It can be seen as an action made by an object, it can return the result (function function). For example, open a book, the result is open, the result returned is true (TRUE); if this book has a password lock, we don't have a password, then do this action, the result is a failure, return False. Of course, there is still an action (ie process) that does not want to return the results (ie, a friend wants to eat through your colleague, then you convey this thing, so "convey" this action you have done, but Specifically he (your colleague) is invited, then you have nothing to do, so you won't get this result.
IV. Objects: It is the notification issued when the object is changed. Of course, many events are not notified. For example, the US president has drank a cup of coffee last night, although the position of this cup of coffee has changed (from the cup to the President's belly), but you won't get any notice. Therefore, it is possible to say that most of the event is more artificial plus. For example, you can use "hot" to boast water, you can do something else in a certain range, when the water is boiled, the state of water changes (boiling), and inspired the incident, "hot" Will sound a notice, then you can deal with some things when this event occurs (unplug the power).
