枚举类使用方法

下面例子包括内容：

1.带有构造器的枚举类定义方法

2.实现接口方法，以及以内部类的方式实现接口（采用内部类的方式实现接口可以使枚举值（枚举实例）的拥有不同方法以及不同的实现）

3.枚举的使用方法

 

1 package com.myenum.test;
2 
3 public interface GenderDesc {
4     String info();
5 
6 }

 

 

 1 package com.myenum.test;
 2 
 3 public enum Gender implements GenderDesc {
 4     MALE("男"), FEMALE("女"), BOY("男孩") {
 5         public String info() {
 6             return "this is a boy!";
 7         }
 8     };
 9 
10     private final String name;
11 
12     private Gender(String string) {
13         this.name = string;
14     }
15 
16     public String getName() {
17         return this.name;
18     }
19 
20     @Override
21     public String info() {
22         return "this is a male or female";
23 
24     }
25 
26 }

 

 1 package com.myenum.test;
 2 
 3 public class CallTest {
 4 
 5     public static void main(String[] args) {
 6 
 7         System.out.println(Gender.MALE.getName());
 8         System.out.println(Gender.FEMALE.getName());
 9 
10         for (Gender g : Gender.values()) {
11             System.out.println(g.toString());
12         }
13 
14         Gender m = Gender.valueOf("MALE");
15         System.out.println(m.ordinal() 
16                 + "  and  " + m.name() 
17                 + "  and  " + m.getName() 
18                 + "  and  " + m.info());
19 
20         Gender g = Enum.valueOf(Gender.class, "FEMALE");
21         System.out.println(g.ordinal() 
22                 + "  and  " + g.name() 
23                 + "  and  " + g.getName() 
24                 + "  and  " + g.info());
25 
26         Gender b = Enum.valueOf(Gender.class, "BOY");
27         System.out.println(b.ordinal() 
28                 + "  and  " + b.name() 
29                 + "  and  " + b.getName() 
30                 + "  and  " + b.info());
31 
32     }
33 
34 }

 

执行结果：

1 男
2 女
3 MALE
4 FEMALE
5 BOY
6 0  and  MALE  and  男  and  this is a male or female
7 1  and  FEMALE  and  女  and  this is a male or female
8 2  and  BOY  and  男孩  and  this is a boy!

 

posted @ 2016-09-16 23:32  月色深潭  阅读(223)  评论(0)  编辑  收藏  举报