java多線程模擬紅綠燈案例

代碼Lighter.java:

package pack1;
/**
 * 燈線程
 * @author Administrator
 *
 */
public class Lighter extends Thread{
//代表燈當前的狀態（這里只考慮紅綠兩種狀態）
public String state;
public void run(){
    while (true){
        try {
            //初始狀態設為紅燈，且紅燈時常為10s
            state = "red";
            System.out.println("lighter:現在是紅燈，靜止車輛通行");
            Thread.sleep(10*1000);
            //10s后燈變綠，設綠燈時間位5秒
            state = "green";
            System.out.println("lighter:現在變綠燈了，車輛可以通行了。");
            Lighter.sleep(5*1000);
        } catch (InterruptedException e) {
            System.out.println("出錯了:"+e);
        }
    }
}
}

代碼Car.java

package pack1;
/**
 * 車輛線程
 * @author Administrator
 *
 */
public class Car extends Thread{
String name="";
//燈作為私有變量，車輛根據燈的狀態決定是否要停止
private Lighter lighter;
public Car(String name,Lighter l){
    this.name=name;
    this.lighter=l;
}
public void run(){
    if (lighter.state.equals("red")){
        System.out.println(this.name+":等待中");
    }else{
        
        System.out.println(this.name+":通過了紅綠燈");
    }
}
}

測試代碼RglightTest.java

package pack1;
/**
 * 紅綠燈測試代碼
 * @author Administrator
 *
 */
public class RglightTest {
public static void main(String[] args) throws InterruptedException {
    Lighter l=new Lighter();
        //紅綠燈開始運行
    l.start();
        //生成20個車輛，依次通過紅綠燈
    for(int i=0;i<20;i++){
        Car c=new Car("car"+i+1,l);
                //當前車輛睡眠1s
        c.sleep(1000);
        c.start();
    }
}
}