内部类 测试例子

package com.sun.test.innerclass;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Panda on 2018/6/11.
 */
public class Controller {
    private List<Event> eventList=new ArrayList<>();
    public void addEvent(Event event){eventList.add(event);}
    public void run(){
        while (eventList.size()>0){
            for(Event event :new ArrayList<>(eventList)){  //这里只能用new ArrayList<>(eventList)  这样转换成list不然remove异常 是因为迭代器有限制
               System.out.println(new ArrayList<>(eventList)); //这里输出的就是实际的eventList的内容
                if(event.ready()){
                    System.out.println(event);
                    event.action();
                    eventList.remove(event);
                }
            }
        }
    }
}

package com.sun.test.innerclass;

/**
 * Created by Panda on 2018/6/11.
 */
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();
}

package com.sun.test.innerclass;

/**
 * Created by Panda on 2018/6/11.
 */
public class GreenhouseController {
   
   /**
    * 测试内部类 的作用
    *
    * @author JiangYuan Sun
    * @date   2019-04-26 10:59
    */
    public static void main(String[] args) {
        GreenhouseControls greenhouseControls = new GreenhouseControls();
        greenhouseControls.addEvent(greenhouseControls.new Bell(900));

        Event[] events={greenhouseControls.new ThermostatNight(0),greenhouseControls.new LightOn(200),
        greenhouseControls.new LightOff(400),greenhouseControls.new WaterOn(600),
        greenhouseControls.new WaterOff(800),greenhouseControls.new ThermostatDay(1400)};
        greenhouseControls.addEvent(greenhouseControls.new Restart(2000,events));
        if(args.length==1){
            greenhouseControls.addEvent(new GreenhouseControls.Terminate(new Integer(args[0])));
        }
        greenhouseControls.run();
    }
}

package com.sun.test.innerclass;

/**
 * Created by Panda on 2018/6/11.
 */
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;
        }
        public String toString(){return "Light is on";}
    }
    public class LightOff extends Event{
        public LightOff(long delayTime){super(delayTime);}
        @Override
        public void action() {
            light=false;
        }
        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;
        }
        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;
        }
        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";
        }
        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";
        }
        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));
        }
        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 event:eventList)
                addEvent(event);
        }
        @Override
        public void action() {
            for(Event event:eventList){
                event.start();
                addEvent(event);
            }
            start();
            addEvent(this);
        }
        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);
        }
        public String toString(){
            return "Terminating";
        }
    }
}