JDK5.0新特性之EnumMap

import java.util.EnumMap;
import java.util.Map;

enum Action
{
    TURN_LEFT,TURN_RIGHT,SHOOT
}

public class EnumMapDemo {

    public static void main(String[] args) {
        Map<Action,String> map = new EnumMap<Action,String>(Action.class);
        map.put(Action.TURN_LEFT, "向左转变");
        map.put(Action.TURN_RIGHT, "向右转变");
        map.put(Action.SHOOT, "射击");
        for(Action action: Action.values())
        {
            System.out.println(map.get(action));
        }
    }

}

EnumMap与HashMap的区别，EnumMap根据枚举的顺序维护对象的排列，和放入顺序无关