创建线程池

import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors;  public class Demo { public static void main(String[] args) {
        ExecutorService es= Executors.newFixedThreadPool(4);  Runnable runnable=new Runnable() { private int ticket=100;  @Override  public void run() { while(true){ if(ticket<=0){ break;  }
                    System.out.println(Thread.currentThread().getName()+"卖了第"+ticket+"张票");  ticket--;  }
            }
        };  for(int i=0;i<4;i++){
            es.submit(runnable);  }
        es.shutdown();  }
}