java多线程模拟交通灯管理系统

public enum Lamp {
 
 //初始状态为红灯
 S2N("N2S","S2W",false),S2W("N2E","E2W",false),
 E2W("W2E","E2S",false),E2S("W2N","S2N",false),
 //对立面红灯
 N2E(null,null,false),N2S(null,null,false),
 W2E(null,null,false),W2N(null,null,false),
 //四个右转方向，始终时绿灯
 S2E(null,null,true),E2N(null,null,true),
 N2W(null,null,true),W2S(null,null,true);
 
 //灯的状态 true=green,false=red
 private boolean lighted;
 private String opposite=null;
 private String next=null;
 
 private Lamp() {}
 
 private Lamp(String opposite,String next,boolean initLighted){
  this.opposite=opposite;
  this.next=next;
  this.lighted=initLighted;
  
 }
 //判断灯的状态
 public boolean getLighted(){
  return lighted;
 }
 //绿灯亮  同时把对面的灯设为绿  下一个灯设为红灯
 public void turnGreen(){
  this.lighted=true;
 
  //如果对面有灯 
  if(opposite!=null){
   Lamp.valueOf(opposite).turnGreen();
  }
 }
 //红灯亮  对立面的灯也变红
 public Lamp turnRed(){
  this.lighted=false;
  Lamp nextGreenLamp=null;
  //对面的灯 同步变化
  if(opposite!=null){
   Lamp.valueOf(opposite).turnRed();
  }
  //下一个灯 绿灯亮 
  if(next!=null){
   nextGreenLamp=Lamp.valueOf(next);
   nextGreenLamp.turnRed();
  }
  return nextGreenLamp;
 }
}

public class Road {
 //存放每条路上的车辆   车名就表示一辆车 
 private List<String> vehicles=new ArrayList<String>();
 private  String roadName=null;
 public Road(String roadName) {
  super();
  //根据路的方向取名，名字和对面的红绿灯同名 E2W表示东向西的路
  this.roadName = roadName;
  
  //用线程池启动一个线程，随机产生一辆车
  Executors.newSingleThreadExecutor().execute(new Runnable(){
   @Override
   public void run() {
    for(int i=1;i<1000;i++){
     try {
      //每隔1~10秒 随机产生一辆车
      Thread.sleep((new Random().nextInt(10)+1)*1000);
     } catch (InterruptedException e) {
      e.printStackTrace();
     }
     //访问外部类的成员变量
     vehicles.add(Road.this.roadName+"路 第  "+i+" 辆车");
    }
   }
   
  });
  
  ScheduledExecutorService timer=Executors.newScheduledThreadPool(1);
  timer.scheduleAtFixedRate(new Runnable(){
 
   @Override
   public void run() {
    //先判断这条路上是否有车
    if(vehicles.size()>0){
     //在判断交通灯状态   
     boolean lighted=Lamp.valueOf(Road.this.roadName).getLighted();
     if(lighted){
      //从汽车列表中移除  并提示已通过路口
      System.out.println(vehicles.remove(0)+"通过路口。。。");
     }
    }
   }
   
  }, 1, 1, TimeUnit.SECONDS);
 }
}

//灯控系统
public class LampController {
 private Lamp currentLamp;
 
 public  LampController() {
  super();
  //交通灯系统初始化   第一个运行的S2N turn green
  this.currentLamp = Lamp.S2N;
  this.currentLamp.turnGreen();
  //定时器 每个10s 切换一次信号灯状态
  ScheduledExecutorService timer=Executors.newScheduledThreadPool(1);
  timer.scheduleAtFixedRate(new Runnable(){
 
   @Override
   public void run() {
     currentLamp=currentLamp.turnRed();
   }
   
  }, 10, 10, TimeUnit.SECONDS);
  
 }
}