package enumerated;

import java.util.*;

import static enumerated.AlarmPoints.*;

/**

* RUN:

* javac enumerated/EnumMaps.java && java enumerated.EnumMaps

* OUTPUT:

* BATHROOM: Bathroom alert!

* KITCHEN: Kitchen fire!

* java.lang.NullPointerException

*/

public class EnumMaps {

public static void main(String[] args) {

EnumMap<AlarmPoints, Command> em = new EnumMap<AlarmPoints, Command>(AlarmPoints.class);

em.put(KITCHEN, new Command() {

public void action() { System.out.println("Kitchen fire!"); }

});

em.put(BATHROOM, new Command() {

public void action() { System.out.println("Bathroom alert!"); }

});

for (Map.Entry<AlarmPoints, Command> e : em.entrySet()) {

System.out.print(e.getKey() + ": ");

e.getValue().action();

}

try {

em.get(UTILITY).action();

}

catch (Exception e) {

System.out.println(e);

}

}

}

interface Command { void action(); }