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内部类和控制框架
//事件类
public abstract class Event {
private long eventTime;
protected final long delayTime;
public Event(long delayTime) {
this.delayTime = delayTime;
start();
}
public void start(){
eventTime = System.nanoTime() + delayTime;
}
public boolean ready(){
return System.nanoTime() >= eventTime;
}
public abstract void action();
}
//实际控制框架类
public class Controller {
private List<Event> eventList = new ArrayList<Event>();
public void addEvent(Event c){
eventList.add(c);
}
public void run(){
while(eventList.size() > 0){
for (Event e : new ArrayList<Event>(eventList)) {
if(e.ready()){
System.out.println(e);
e.action();
eventList.remove(e);
}
}
}
}
}
//应用程序框架类
public class GreenhouseControls extends Controller {
private boolean light = false;
public class LightOn extends Event{
public LightOn(long delayTime) {
super(delayTime);
}
@Override
public void action() {
light = true;
}
@Override
public String toString() {
return "light is on";
}
}
public class LightOff extends Event{
public LightOff(long delayTime) {
super(delayTime);
}
@Override
public void action() {
light = false;
}
@Override
public String toString() {
return "light is off";
}
}
private boolean water = false;
public class WaterOn extends Event{
public WaterOn(long delayTime) {
super(delayTime);
}
@Override
public void action() {
water = true;
}
@Override
public String toString() {
return "Greenhouse water is on";
}
}
public class WaterOff extends Event{
public WaterOff(long delayTime) {
super(delayTime);
}
@Override
public void action() {
water = false;
}
@Override
public String toString() {
return "Greenhouse water is off";
}
}
private String thermostat = "Day";
public class ThermostatNight extends Event{
public ThermostatNight(long delayTime) {
super(delayTime);
}
@Override
public void action() {
thermostat = "Night";
}
@Override
public String toString() {
return "Thermostat on night setting";
}
}
public class ThermostatDay extends Event{
public ThermostatDay(long delayTime) {
super(delayTime);
}
@Override
public void action() {
thermostat = "Day";
}
@Override
public String toString() {
return "Thermostat on day setting";
}
}
public class Bell extends Event{
public Bell(long delayTime) {
super(delayTime);
}
@Override
public void action() {
addEvent(new Bell(delayTime));
}
@Override
public String toString() {
return "Bing!";
}
}
public class Restart extends Event{
private Event[] eventList;
public Restart(long delayTime,Event[] eventList) {
super(delayTime);
this.eventList = eventList;
for (Event e : eventList) {
addEvent(e);
}
}
@Override
public void action() {
for (Event e : eventList) {
e.start();
addEvent(e);
}
start();
addEvent(this);
}
@Override
public String toString() {
return "Restarting system";
}
}
public static class Terminate extends Event{
public Terminate(long delayTime) {
super(delayTime);
}
@Override
public void action() {
System.exit(0);
}
@Override
public String toString() {
return "Terminating";
}
}
}
内部类和控制框架