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 }
This moment will nap, you will have a dream; but this moment study, you will interpret a dream.