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      JDK5交通燈模擬控制系統(tǒng)

      時間: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 ,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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