线程池

• 线程池相关的类
  ExecutorService 接口，ThreadPoolExecutor类，Executors工具类
• 常见的用法
  ExecutorService pool = Executors.newCachedThreadPool();
  使用其execute(Runnable r)方法

  class ThreadPoolDemo{
    public static void main(String[] args){
        ExecutorService pool = Executors.newCachedThreadPool();
        MyTask t1 = new Mytask(5);
        MyTask t2 = new MyTask(7);
        MyTask t3 = new MyTask(8);
        pool.execute(t1);
        pool.execute(t2);
        pool.execute(t3);
        pool.shutdown();
    }
  }
  class MyTask implements Runnable{...}
  

Timer

• 使用java.util.Timer类 重复某件事

  import java.util.*;
  class TimerTest{
    public static void main(String[] args){
        Timer timer = new Timer("display");
        TimerTask task = new MyTask();
        timer.schedule(task, 1000, 1000);
    }
  }
  class MyTask extends TimerTask{...}
  

• 使用javax.swing.Timer类 重复执行ActionListener

  import javax.swing.Timer;
  class TimerSwing extends JFrame{
    Timer timer;
    public void init(){
    ...;
    timer = new Timer(1000, (e)->{
        setTitle(new java.util.Date().toString());
    });
    timer.start();
    }
    public static void main(String[] args){...}
  }