---------------------------------------- JavaEE+云物联、期待与您交流!---------------------------------------------java
/** *1,交通灯系统三要素:交通灯,交通灯控制器,路。 *2,交通灯控制12调路线,四条主路线,四条跟随路线,四条自由路线。 *3,交通灯控制器,设置初始灯,并控制交通灯的切换动做。 *4,路拥有存储车辆和根据交通灯信号放行车辆的功能。 */ import java.util.*; import java.util.concurrent.*; public class Traffic { public static void main(String[] args) { String[] directions = {"S2N","S2W","E2W","E2S", "N2S","N2E","W2E","W2N", "S2E","E2N","N2W","W2S"}; for(int i=0;i<directions.length;i++) { new Road(directions[i]); } new LampController(); } } enum Lamp { S2N("N2S","S2W",false),S2W("N2E","E2W",false), E2W("W2E","E2S",false),E2S("W2N","S2N",false), N2S(null,null,false),N2E(null,null,false), W2E(null,null,false),W2N(null,null,false), S2E(null,null,true),E2N(null,null,true), N2W(null,null,true),W2S(null,null,true); private Lamp(String opposite,String next,boolean lighted) { this.opposite = opposite; this.next = next; this.lighted = lighted; } private boolean lighted; private String opposite; private String next; public boolean isLighted() { return lighted; } public void light() { this.lighted = true; if(opposite!=null) Lamp.valueOf(opposite).light(); System.out.println(name() +" lamp is green,下面总共应该有6个方向能看到汽车驶过!"); } public Lamp blackOut() { this.lighted = false; if(opposite!=null) Lamp.valueOf(opposite).blackOut(); Lamp nextLamp = null; if(next!=null) { nextLamp = Lamp.valueOf(next); System.out.println("绿灯从"+name()+"------>切换为"+next); nextLamp.light(); } return nextLamp; } } class LampController { private Lamp currentLamp; public LampController() { currentLamp = Lamp.S2N; currentLamp.light(); ScheduledExecutorService timer = Executors.newScheduledThreadPool(1); timer.scheduleAtFixedRate( new Runnable(){ public void run() { currentLamp = currentLamp.blackOut(); } }, 10, 10, TimeUnit.SECONDS ); } } class Road { private List<String> vehicles = new ArrayList<String>(); private String name = null; public Road(String name) { this.name = name; ExecutorService pool = Executors.newSingleThreadExecutor(); pool.execute(new Runnable(){ public void run() { for(int i=1;i<1000;i++) { try { Thread.sleep((new Random().nextInt(10)+1)*1000); } catch (InterruptedException e) { e.printStackTrace(); } vehicles.add(Road.this.name+"_"+i); } } }); ScheduledExecutorService timer = Executors.newScheduledThreadPool(1); timer.scheduleAtFixedRate( new Runnable(){ public void run() { if(vehicles.size()>0) { boolean lighted = Lamp.valueOf(Road.this.name).isLighted(); if(lighted) System.out.println(vehicles.remove(0)+" is traversing !"); } } }, 1, 1, TimeUnit.SECONDS ); } }
---------------------------------------- JavaEE+云物联、期待与您交流!---------------------------------------------dom