java多线程模拟红绿灯案例

Posted 2020-10-22 海的味道

代码Lighter.java:

 1 package pack1;
 2 /**
 3  * 灯线程
 4  * @author Administrator
 5  *
 6  */
 7 public class Lighter extends Thread{
 8 //代表灯当前的状态（这里只考虑红绿两种状态）
 9 public String state;
10 public void run(){
11     while (true){
12         try {
13             //初始状态设为红灯，且红灯时常为10s
14             state = "red";
15             System.out.println("lighter:现在是红灯，静止车辆通行");
16             Thread.sleep(10*1000);
17             //10s后灯变绿，设绿灯时间位5秒
18             state = "green";
19             System.out.println("lighter:现在变绿灯了，车辆可以通行了。");
20             Lighter.sleep(5*1000);
21         } catch (InterruptedException e) {
22             System.out.println("出错了:"+e);
23         }
24     }
25 }
26 }

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

 1 package pack1;
 2 /**
 3  * 红绿灯测试代码
 4  * @author Administrator
 5  *
 6  */
 7 public class RglightTest {
 8 public static void main(String[] args) throws InterruptedException {
 9     Lighter l=new Lighter();
10         //红绿灯开始运行
11     l.start();
12         //生成20个车辆，依次通过红绿灯
13     for(int i=0;i<20;i++){
14         Car c=new Car("car"+i+1,l);
15                 //当前车辆睡眠1s
16         c.sleep(1000);
17         c.start();
18     }
19 }
20 }