"Thinkinginjava" 19, the realization of control framework

/*** book: "Thinking in Java" * Function: Control Framework Implementation * File: event.java* time: April 3, 2015 21:33:11* Author: cutter_point*/package Lession10innerclasses.controller;public Abstract class Event {Private long eventtime;protected final long delaytime; Public Event (Long delaytime) {this.delaytime = Delaytime;this.start ();} public void Start () {eventtime = System.nanotime () + delaytime;} public Boolean Ready () {return system.nanotime () >= eventtime;//exceeds the delay time}public abstract void Action ();}

/*** book: "Thinking in Java" * Function: Control Framework Implementation * File: controller.java* time: April 3, 2015 21:38:38* Author: cutter_point*/package Lession10innerclasses.controller;import Java.util.arraylist;import Java.util.list;public class Controller {private list<event> eventlist = new arraylist<event> ();p ublic void addevent (Event c) {Eventlist.add (c);} public void Run () {while (eventlist.size () > 0) {for (Event e:new arraylist<event> (eventlist))//Make a copy of EventList To avoid altering the original data if (E.ready ()) {System.out.println (e); e.action (); Eventlist.remove (e);}}}

/*** book: "Thinking in Java" * Function: Control framework implementation, 1, the complete implementation of the control framework is created by a single class, so that the implementation of the details are encapsulated. The inner class is used to represent the various action* necessary to solve the problem, and 2, the inner class can easily access any member of the perimeter class, so it is possible to avoid this implementation becoming unwieldy. * File: greenhousecontrols.java* time: April 7, 2015 18:29:47* Author: cutter_point*/package Lession10innerclasses;import lession10innerclasses.controller.*;p ublic class Greenhousecontrols extends Controller{private Boolean light = false; public class Lighton extends event//because Event is an abstract class, you must implement constructors and abstract functions {public Lighton (long Delaytime) {super (delaytime);} @Overridepublic void Action () {light = true;} Public String toString () {return ' light was on ';}} public class Lightoff extends event//because Event is an abstract class, you must implement constructors and abstract functions {public lightoff (long Delaytime) {super (delaytime);} @Overridepublic void Action () {light = false;} Public String toString () {return ' light is Off ';}} Private Boolean water = False;public class Wateron extends event//because Event is an abstract class, you must implement constructors and abstract functions {public Wateron (long Delaytime) {super (delaytime);} @Overridepublic void Action () {water = true;} Public String Tostring () {return "Greenhouse is on";}} public class Wateroff extends event//because Event is an abstract class, you must implement constructors and abstract functions {public wateroff (long Delaytime) {super (delaytime);} @Overridepublic void Action () {water = false;} Public String toString () {return ' greenhouse is off ';}} Private String thermostat = "Day";p Ublic class Thermostatday extends event//because Event is an abstract class, you must implement constructors and abstract functions {public Thermostatday (Long Delaytime) {super (delaytime);} @Overridepublic void Action () {thermostat = "Day";} Public String toString () {return ' thermostat on day setting ';}} public class Thermostatnight extends event//because Event is an abstract class, you must implement constructors and abstract functions {public thermostatnight (long Delaytime) {Super (Delaytime);} @Overridepublic void Action () {thermostat = "Night";} Public String toString () {return ' thermostat on Night Setting ";}} public class Bell extends event//because the Event is an abstract class, you must implement the constructor and abstract function {public Bell (long Delaytime) {super (delaytime);} @Overridepublic void Action () {greenhousecontrols:addevent (new Bell (Delaytime));//This is his father.}public String toStRing () {return "bing!!";}} public class Restart extends event//because Event is an abstract class, you must implement constructors and abstract functions {private event[] eventlist;public Restart (long Delaytime, event[] eventlist) {super (delaytime); this.eventlist = Eventlist;for (Event e:eventlist) Greenhousecontrols: Addevent (e);} @Overridepublic void Action () {for (Event e:eventlist) {E.start (); Greenhousecontrols:addevent (e);} This.start (); Greenhousecontrols:addevent (this);} Public String toString () {return ' restarting system ';}} public static class Terminate extends Event{public Terminate (long delaytime) {super (delaytime);} @Overridepublic void Action () {system.exit (0);} Public String toString () {return ' terminating ';}}}

Output:

Other Operation Obj1
1 obj1
------------------------
1 obj1
2 obj1
------------------------
Other Operation Obj1
2 obj1
Other Operation Obj1
3 obj1

Sometimes it will feel very painful, I TM write n more code, the results of the implementation is only a little bit, is it really concentrated is the essence???

"Thinkinginjava" 19, the realization of control framework