0基础学java_static关键字

 1 package company.feimao.package1;
 2 class Person{
 3     String name;
 4     int age;
 5     static String city = "上海";
 6     public Person(String n , int a) {
 7         this.name = n;
 8         this.age = a;
 9     }
10     public void info(){
11         System.out.println("姓名 ：" + this.name + ", 年龄 ：" + this.age + ", 城市 :" + this.city );
12         }
13 }
14 public class StaticDemo01 {
15     public static void main(String args[]){
16         Person p1 = new Person("肥猫" , 28);
17         Person p2 = new Person("猪宝宝" , 28);
18         Person p3= new Person("淘淘" , 2);
19         System.out.println("---------------修改之前----------");
20         p1.info();
21         p2.info();
22         p3.info();
23         Person.city = "卢湾区";
24         System.out.println("---------------修改之后——---------");
25         p1.info();
26         p2.info();
27         p3.info();
28     }
29 
30 }