实现交通灯功能

来源：互联网发布：昆山软件开发编辑：程序博客网时间：2024/06/04 18:15

这个功能的实现是经过观看张孝祥老师的视频后完成的。

视频下载地址：http://www.itheima.com/news/2012821/24cf70b28ae2.shtml

交通灯管理系统，主要有三个类，路Road 灯 Lamp 灯控制类 LampController

Road提供模拟汽车不断上路的过程和放行车辆的过程

Lamp提供灯光变换的功能

LampController 控制灯光的变换

package com.lihao.traffic;import java.util.ArrayList;import java.util.List;import java.util.Random;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.ScheduledExecutorService;import java.util.concurrent.TimeUnit;public class Road {    private List<String> vechicles =new ArrayList<String>();private String name=null;public Road(String name){this.name=name;//模拟汽车不断上路的过程ExecutorService pool = Executors.newSingleThreadExecutor();pool.execute(new Runnable(){@Overridepublic void run() {for(int i=1;i<1000;i++){try {Thread.sleep((new Random().nextInt(10)+1)*1000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}vechicles.add(Road.this.name+"_"+i);}}});//每隔一秒检查对应的灯是否为绿灯，如果是放行一辆车//在一秒之后，每隔一秒执行ScheduledExecutorService timer = Executors.newScheduledThreadPool(1);timer.scheduleAtFixedRate(new Runnable(){@Overridepublic void run() {if(vechicles.size()>0){boolean lighted=Lamp.valueOf(Road.this.name).isLighted();if(lighted){System.out.println(vechicles.remove(0)+" is traversing");}}}}, 1, 1, TimeUnit.SECONDS);}}

package com.lihao.traffic;public enum Lamp {    E2W("W2E","S2N",false),S2N("N2S","E2S",false),E2S("W2N","S2W",false),S2W("N2E","E2W",false),    W2E(null,null,false),N2S(null,null,false),W2N(null,null,false),N2E(null,null,false),    E2N(null,null,true),N2W(null,null,true),W2S(null,null,true),S2E(null,null,true);                private Lamp(String opposite,String next,boolean lighted){    this.opposite=opposite;    this.next=next;    this.lighted=lighted;    }        private String opposite;    private String next;    private boolean lighted;    public boolean isLighted(){    return lighted;    }        //某个灯变绿时，对应的灯也变绿    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个方向会有车辆行驶！！");    }        //某个灯变红时，对应的灯也变红，下个灯变亮    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;    }}

package com.lihao.traffic;import java.util.concurrent.Executors;import java.util.concurrent.ScheduledExecutorService;import java.util.concurrent.TimeUnit;public class LampController {    private Lamp currentLamp;public LampController(){currentLamp = Lamp.E2W;currentLamp.light();//红灯绿灯间隔时间为10秒ScheduledExecutorService timer = Executors.newScheduledThreadPool(1);timer.scheduleAtFixedRate(new Runnable(){public void run(){currentLamp = currentLamp.blackOut();}}, 10, 10, TimeUnit.SECONDS);}}

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