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

package com.myenum.test;

public interface GenderDesc {
    String info();

}

package com.myenum.test;

public enum Gender implements GenderDesc {
    MALE("男"), FEMALE("女"), BOY("男孩") {
        public String info() {
            return "this is a boy!";
        }
    };

    private final String name;

    private Gender(String string) {
        this.name = string;
    }

    public String getName() {
        return this.name;
    }

    @Override
    public String info() {
        return "this is a male or female";

    }

}

package com.myenum.test;

public class CallTest {

    public static void main(String[] args) {

        System.out.println(Gender.MALE.getName());
        System.out.println(Gender.FEMALE.getName());

        for (Gender g : Gender.values()) {
            System.out.println(g.toString());
        }

        Gender m = Gender.valueOf("MALE");
        System.out.println(m.ordinal() 
                + "  and  " + m.name() 
                + "  and  " + m.getName() 
                + "  and  " + m.info());

        Gender g = Enum.valueOf(Gender.class, "FEMALE");
        System.out.println(g.ordinal() 
                + "  and  " + g.name() 
                + "  and  " + g.getName() 
                + "  and  " + g.info());

        Gender b = Enum.valueOf(Gender.class, "BOY");
        System.out.println(b.ordinal() 
                + "  and  " + b.name() 
                + "  and  " + b.getName() 
                + "  and  " + b.info());

    }

}

执行结果：

男
女
MALE
FEMALE
BOY
0  and  MALE  and  男  and  this is a male or female
1  and  FEMALE  and  女  and  this is a male or female
2  and  BOY  and  男孩  and  this is a boy!