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  • EnumMap demo

    优点:常量做为Key,在编译期就确定了。Enum做为key,在运行时也可以改变

    package enumdemo;
    
    import java.util.EnumMap;
    import java.util.Map;
    import java.util.Set;
    
    public class EnumMaps {
        public static void main(String[] args) {
            EnumMap<AlarmPoints, Command> em = new EnumMap<AlarmPoints, Command>(AlarmPoints.class);
            em.put(AlarmPoints.KITCHEN, new Command() {
                @Override
                public void action() {
                    System.out.println("action:kitchen...");
                }
            });
            em.put(AlarmPoints.BATHROOM, new Command() {
                @Override
                public void action() {
                    System.out.println("action:bathroom");
                }
            });
    
    
            Set<Map.Entry<AlarmPoints, Command>> set = em.entrySet();
            for (Map.Entry<AlarmPoints, Command> entry : set) {
                System.out.println(entry.getKey() + "");
                entry.getValue().action();
            }
    
            System.out.println(em.get(AlarmPoints.UTILITY) + "");
    
    
        }
    }
    
    enum AlarmPoints {
        KITCHEN,
        BATHROOM,
        UTILITY
    }
    
    interface Command {
        void action();
    }
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  • 原文地址:https://www.cnblogs.com/softidea/p/4784443.html
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