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  • JDK5交通燈模擬控制系統(tǒng)

    時(shí)間:2024-10-11 20:52:38 JAVA認(rèn)證 我要投稿
    • 相關(guān)推薦

    關(guān)于JDK5交通燈模擬控制系統(tǒng)

      為了方便廣大程序猿交流和學(xué)習(xí),下面小編準(zhǔn)備了關(guān)于JDK5交通燈模擬控制系統(tǒng),歡迎大家參考!

      本系統(tǒng)由 Lamp.java , LampController.java , Road.java 和MainClass.java組成。

      Lamp.java :

      package com.isoftstone.interview.traffic;

      public enum Lamp {

      //前進(jìn) ,左拐 ,右拐

      S2N("N2S","S2W",false), S2W("N2E","E2W",false), S2E(null,null,true),

      E2W("W2E","E2S",false), E2S("W2N","S2N",false), E2N(null,null,true),

      N2S(null,null,false) , N2E(null,null,false), N2W(null,null,true),

      W2E(null,null,false) , W2N(null,null,false), W2S(null,null,true);

      String opposite;

      String next;

      boolean lighted;

      //構(gòu)造函數(shù):初始化當(dāng)前燈

      private Lamp(String opposite,String next,boolean lighted){

      this.opposite = opposite;

      this.next = next;

      this.lighted = lighted;

      }

      //返回當(dāng)前燈的狀態(tài)

      public boolean isLighted(){return lighted;}

      public void light(){

      this.lighted = true;

      if(opposite != null){

      Lamp.valueOf(opposite)。light();

      }

      System.out.println(name() + "is Green. Soon there will be cars crossed the street at six deractions.");

      }

      public Lamp blackout(){

      //關(guān)閉當(dāng)前燈 : 設(shè)為false

      this.lighted = false;

      Lamp nextLamp = null;

      if(opposite != null){Lamp.valueOf(opposite)。blackout();}

      //檢查下一個(gè)燈并啟動它

      if(next != null){

      nextLamp = Lamp.valueOf(next);

      System.out.println(name() + " to the " + next + " 's light is Green.");

      nextLamp.light();

      }

      return nextLamp;

      }

      }

      LampController.java

      package com.isoftstone.interview.traffic;

      import java.util.concurrent.Executors;

      import java.util.concurrent.TimeUnit;

      public class LampController {

      private Lamp currentLamp;

      public LampController(){

      currentLamp = Lamp.S2N;

      currentLamp.light();

      //啟動一個(gè)線程 : 每十秒將當(dāng)前燈設(shè)置為紅

      Executors.newScheduledThreadPool(1)。scheduleAtFixedRate(

      new Runnable() {

      public void run() {

      currentLamp = currentLamp.blackout();

      }

      },

      10,

      10,

      TimeUnit.SECONDS

      );

      }

      }

      Road.java

      package com.isoftstone.interview.traffic;

      import java.util.List;

      import java.util.ArrayList;

      import java.util.Random;

      import java.util.concurrent.Executors;

      import java.util.concurrent.TimeUnit;

      public class Road {

      private String name;

      private List vehicles = new ArrayList();

      public Road(String name){

      this.name = name;

      //模擬車輛不斷隨機(jī)上路的過程

      Executors.newSingleThreadExecutor()。execute(new Runnable() {

      public void run() {

      for(int i = 0 ; i < 1000 ;i++){

      try {

      Thread.sleep((new Random()。nextInt(10) + 1) * 1000);

      } catch (InterruptedException e) {

      e.printStackTrace();

      }

      vehicles.add(Road.this.name + "_" + i);

      }

      }

      });

      //每隔一秒檢查對應(yīng)的燈是否為綠,如果是 ,則放行一輛車,具體操作為從vehicles集合中移除第一輛車。

      Executors.newScheduledThreadPool(1)。scheduleAtFixedRate(

      new Runnable() {

      public void run() {

      if(vehicles.size() > 0){

      if(Lamp.valueOf(Road.this.name)。isLighted()){

      System.out.println(vehicles.remove(0) + " is traversing");

      }

      }

      }

      },

      1,

      1,

      TimeUnit.SECONDS);

      }

      }

      最后在Main方法中啟動系統(tǒng):public static void main(String[] args) {

      String[] deractions = {"S2N","S2W","E2W","E2S","N2S","N2E","W2E","W2N","S2E","E2N","N2W","W2S"};

      //模擬十二條方向的路線

      for(int i = 0 ; i < deractions.length; i++){

      new Road(deractions[i]);

      }

      //啟動交通燈控制器

      new LampController();

      }

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