Java线程池实现道理与技能，看这一篇就够了

3.测试Main要领

public static void main(String[] args) throws InterruptedException { 
       for (int i = 0; i < 1000; i++) { 
           ThreadPool.getInstance().start(new Runnable() { 
               @Override 
               public void run() { 
                   try { 
                       //休眠100ms 
                       Thread.sleep(100); 
                   } catch (InterruptedException e) { 
                       e.printStackTrace(); 
                   } 
               } 
           }); 
       } 
   } 

03ThreadPoolExecutor

为了可以或许更好地节制多线程，JDK提供了一套Executor框架，辅佐开拓职员有用地举办线程节制。Executor框架无论是newFixedThreadPool()要领、newSingleThreadExecutor()要领照旧newCachedThreadPool()要领，其内部实现均行使了 ThreadPoolExecutor：

public static ExecutorService newCachedThreadPool() { 
        return new ThreadPoolExecutor(0, Integer.MAX_VALUE, 
                                      60L, TimeUnit.SECONDS, 
                                      new SynchronousQueue<Runnable>()); 
    } 
     
    public static ExecutorService newFixedThreadPool(int nThreads) { 
        return new ThreadPoolExecutor(nThreads, nThreads, 
                                      0L, TimeUnit.MILLISECONDS, 
                                      new LinkedBlockingQueue<Runnable>()); 
    } 
     
    public static ExecutorService newSingleThreadExecutor() { 
        return new FinalizableDelegatedExecutorService 
            (new ThreadPoolExecutor(1, 1, 
                                    0L, TimeUnit.MILLISECONDS, 
                                    new LinkedBlockingQueue<Runnable>())); 
    } 

由以上线程池的实当代码可以知道，它们只是对 ThreadPoolExecutor 类的封装。为何 ThreadPoolExecutor 类有云云强盛的成果?来看一下 ThreadPoolExecutor 最重要的结构要领。

3.1 结构要领

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