Java Static关键字之小程序

对于学习static我们先来看两个例子：

 1 public class Cat {

 2     private static int sid = 0;

 3     private String name;

 4     int id;

 5     Cat(String name) {

 6         this.name = name;

 7         id = sid++;

 8     }

 9     public void info(){

10         System.out.println

11                ("My name is "+name+" No."+id);

12     }

13     public static void main(String arg[]){

14

15         Cat.sid = 100;

16         Cat mimi = new Cat("mimi");17         Cat pipi = new Cat("pipi");

18         mimi.info();

19         pipi.info();

20     }

21 }

运行结果为: My name is mimi No.100      My name is
pipi No.101

 1 public class Cat {

 2     private  int sid = 0;

 3     private String name;

 4     int id;

 5     Cat(String name) {

 6         this.name = name;

 7         id = sid++;

 8     }

 9     public void info(){

10         System.out.println

11                ("My name is "+name+" No."+id);

12     }

13     public static void main(String arg[]){

14

15        // Cat.sid = 100;

16         Cat mimi = new Cat("mimi");

17         Cat pipi = new Cat("pipi");

18         mimi.info();

19         pipi.info();

20     }

21 }

运行结果为: My name is mimi No.0     My name is pipi
No.0

Java Static关键字之小程序