1 package com.example;
 2 
 3 /**
 4  * Created by Y on 16/4/13.
 5  */
 6 public class People {
 7     private String name;
 8     private int age;
 9 
10     public void setName(String name) {
11         this.name = name;
12     }
13 
14     public String getName() {
15         return name;
16     }
17 
18     public int getAge() {
19         return age;
20     }
21 
22     public void setAge(int age) {
23         this.age = age;
24     }
25     public void tell(){
26         System.out.println("name is:"+this.getName()+"age is :"+this.getAge());
27     }
28 }

 1 package com.example;
 2 
 3 /**
 4  * Created by Y on 16/4/13.
 5  */
 6 public class People {
 7     private String name;
 8     private int age;
 9     public People(){
10         System.out.println("这是无参数构造方法！");
11     }
12     public People(String name,int age){
13         this();
14         this.name = name;
15         this.age = age;
16     }
17 }

 1 package com.example;
 2 
 3 /**
 4  * Created by Y on 16/4/13.
 5  */
 6 public class People {
 7     public void tell(){
 8         System.out.print(this);
 9     }
10 }