8. Worker Thread模式*

工作没来就一直等，工作来了就干活

public class Main{
    public static void main(String[] args){
        Channel channel = new Channel(5);
        channel.startWorkers();
        new ClientThread("Alice",channel).start();
        new ClientThread("Bobby",channel).start();
        new ClientThread("Chris",channel).start();
    }
}