java.day5_2(对象和类)（Java.day5_2 (objects and classes)）.docVIP

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java.day5_2(对象和类)（Java.day5_2 (objects and classes)）.doc

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java.day5_2(对象和类)（Java.day5_2 (objects and classes)）

java.day5_2(对象和类)（Java.day5_2 (objects and classes)） In the last class, we mainly analyzed the idea of object-oriented programming, which was abstracted from the objective world, and the objective world was made up of objects. Small objects can become attributes of large objects, while objects can call each other. Once again, when we are going to solve an objective problem, we are using object oriented thinking. First of all, to solve the problem needs of the object ready, and then consider how to match the object. For example, there are a, B, C three objects, the first step a tune B method, the second step B call C method, the third step a, then call the C method, the problem is solved, this is object-oriented general idea. In this class we will talk about why object oriented will be used in the computer field. First, the computer needs come from the objective world. The computer does what it needs from the objective world, but simply allows you to address the needs of the world in the computer. Taobao is an application of objective computer to solve the business demand in the objective world, thus forming the commodity transaction behavior of human society. If there were no computers, that demand would be there, and Taobaos emergence would demand the use of computers to solve business problems, not necessarily to the free market. QQ solves the communication between people, so to solve the objective problems in the object-oriented thinking, use the computer to solve the demand can also use the idea of object oriented, so that people do not worry about the problem of thought. For example, how do you develop Taobao? What kind of objects do you want to develop in the real market? Sellers, shops, goods, objects, and objects. Similarly, using this approach to solve computer problems, the use of object-oriented thinking. Its advantage is self-evident, then what is also called the object in the computer? It is defined in the Java virtual machine for storage space, is a pi