Demoperson 造人

 1 package com.duixiangninth;
 2 
 3 import java.security.Permission;
 4 
 5 public class DemoPerson {
 6 
 7     public int id;
 8     public String name;
 9     public int age;
10     public String city;
11     public String introduce() {
12             return "My id=" + id + ", name=" + name + ", age=" + age + ", city=" + city ;
13         }  
14      public DemoPerson() {
15             
16         }
17         //有参数构造
18         public DemoPerson(int id,String name,int age,String city) {//形式参数，接收实参
19             this.id=id; //this关键字，表达的含义是当前对象 .表示当前对象的某个调用
20             this.name=name;
21             this.age=age;
22             this.city=city;
23         }
24 
25     public static void main(String[] args) {
26         /*DemoPerson p1=new DemoPerson(110001,"刘备",43,"北京");//这叫实际参数，实参
27         DemoPerson p2=new DemoPerson(110002,"关羽",35,"上海");
28         DemoPerson p3=new DemoPerson(110003,"张飞",25,"广州");
29         DemoPerson p4=new DemoPerson(110004,"诸葛亮",20,"茅庐");
30         p1.setName("刘贝贝");
31         shuchu(p1.getName());
32         shuchu(p2.getName());
33         shuchu(p3.getName());
34         shuchu(p4.getName());*/
35         // TODO Auto-generated method stub
36         DemoPerson p1=new DemoPerson();
37         DemoPerson p2=new DemoPerson();
38         DemoPerson p3=new DemoPerson();
39         DemoPerson p4=new DemoPerson();
40         p1.id=110001;
41         p1.name="刘备";
42         p1.age=43;
43         p1.city="蜀国";
44         p2.id=110002;
45         p2.name="关羽";
46         p2.age=35;
47         p2.city="蜀国";
48         p3.id=110003;
49         p3.name="张飞";
50         p3.age=32;
51         p3.city="蜀国";
52         p4.id=110004;
53         p4.name="诸葛亮";
54         p4.age=25;
55         p4.city="蜀国";
56         System.out.println(p1.introduce());
57         System.out.println(p2.introduce());
58         System.out.println(p3.introduce());
59         System.out.println(p4.introduce());
60         
61     }
62     /* private String getName() {
63         // TODO Auto-generated method stub
64         return null;
65     }
66     private void setName(String string) {
67         // TODO Auto-generated method stub
68         
69     }*/
70     public static void shuchu(String what) {
71             System.out.println(what);
72      }
73 
74 }