java多线程模拟红绿灯案例

代码Lighter.java:

package pack1;
/**
 * 灯线程
 * @author Administrator
 *
 */
public class Lighter extends Thread{
//代表灯当前的状态（这里只考虑红绿两种状态）
public String state;
public void run(){
    while (true){
        try {
            //初始状态设为红灯，且红灯时常为10s
            state = "red";
            System.out.println("lighter:现在是红灯，静止车辆通行");
            Thread.sleep(10*1000);
            //10s后灯变绿，设绿灯时间位5秒
            state = "green";
            System.out.println("lighter:现在变绿灯了，车辆可以通行了。");
            Lighter.sleep(5*1000);
        } catch (InterruptedException e) {
            System.out.println("出错了:"+e);
        }
    }
}
}

代码Car.java

package pack1;
/**
 * 车辆线程
 * @author Administrator
 *
 */
public class Car extends Thread{
String name="";
//灯作为私有变量，车辆根据灯的状态决定是否要停止
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+":通过了红绿灯");
    }
}
}

测试代码RglightTest.java

package pack1;
/**
 * 红绿灯测试代码
 * @author Administrator
 *
 */
public class RglightTest {
public static void main(String[] args) throws InterruptedException {
    Lighter l=new Lighter();
        //红绿灯开始运行
    l.start();
        //生成20个车辆，依次通过红绿灯
    for(int i=0;i<20;i++){
        Car c=new Car("car"+i+1,l);
                //当前车辆睡眠1s
        c.sleep(1000);
        c.start();
    }
}
}