2015-3-29 Java class, object definition and usage

1, what is a class?

A: The class is an objective, abstract, conceptual thing.

2, what is an object?

A: The object is concrete, practical, representing a thing. For example: A car is a class, a car, a bicycle is his object.

About classes and objects: A class is a template for an object that is an individual of the class.

How do I define a class in 3,java?

Class name defines human in Java syntax: public class person{}

4, how is the object defined?

1, Object declaration: Class name Object name; 2, object creation Object name = new class name (); new function: allocates memory space.

Can also be written as: Class Name Object name = new class name ();

5, Example: Create an air conditioner and call the refrigeration.

Design an air-conditioning package Practice;public class Kongtiao {    ///Air Conditioning property    String name;    String Pinpai;    String Pishu;    int tempeture;        Define refrigeration behavior    void Cool ()    {        tempeture--;    }        Define heating behavior    void hot ()    {        tempeture+=7;    }    Main function public    static void Main (string[] args) {        Kongtiao kt = new Kongtiao ();        Kt.name = "air conditioning";        Kt.pishu = "2 Horses";        Kt.tempeture =;        Kt.pinpai = "Gree";        /**        Kt.cool ();        System.out.println ("The temperature of the air conditioning is" +kt.tempeture);        *                /Kt.hot ();        System.out.println ("The temperature of the air conditioner is" +kt.tempeture);}                    }

2015-3-29 Java class, object definition and usage