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();
     }
 }
 }