10

2 
 3 public class L {
 4 
 5          public int id;
 6         public String name;
 7         public int age;
 8         public String city;
 9         public String introduce() {
10             return  + id +  ":   在下  " + name + ", 芳龄" + age + ", 家住" + city ;
11         }  
12     
13 
14 }

 1 package cn.zrjh;
 2 
 3 public class Y {
 4 
 5     public static void main(String[] args) {
 6         L p1=new L();
 7         L p2=new L();
 8         L p3=new L();
 9         L p4=new L();
10         p1.id=100000;   p1.name="罗元昊";   p1.age=19;   p1.city="418";
11         p2.id=200000;   p2.name="孔宏旭";   p2.age=18;   p2.city="418";
12         p3.id=300000;   p3.name="于星晔";   p3.age=19;   p3.city="418";
13         p4.id=400000;   p4.name="黄浩然";   p4.age=19;   p4.city="418";
14         System.out.println(p1.introduce());
15         System.out.println(p2.introduce());
16         System.out.println(p3.introduce());
17         System.out.println(p4.introduce());
18 
19     }
20 
21 }