ThreadLocal & Inheritable ThreadLocal에서 사용하는 구덩이

           ，                       ，             run  。   ThreadLocal     ，    remove  。

public class B {
     static final ThreadLocal threadParam = new ThreadLocal<>();
     public static void main(String[] args) throws InterruptedException {
         //        3   
         ExecutorService execService = Executors.newFixedThreadPool(3);
         //           
         while (true) {
             Thread t = new Thread(()->{
                     threadParam.set("abc");
                     System.out.println("t1:" + threadParam.get());
                     //     remove,      //                    threadParam.remove();
             });
             execService.execute(t);
             TimeUnit.SECONDS.sleep(1);
             Thread t2 = new Thread(()-> {
                     System.out.println("t2:" + threadParam.get());
             });
             execService.execute(t2);
         }
     } }

public static void main(String[] args) throws InterruptedException {
        //        3   
        ExecutorService execService = Executors.newFixedThreadPool(3);
        //           
        while (true) {
            //  1,        
            Thread t = new Thread(()->{
                threadParam.set("abc");
                System.out.println("t1:" + threadParam.get());
                Thread t2 = new Thread(()->{
                    System.out.println("t2:" + threadParam.get());
//                        threadParam.remove();
                });
                execService.execute(t2);

                Thread t3 = new Thread(()->{
                    System.out.println("t3:" + threadParam.get());
//                        threadParam.remove();
                });
                execService.execute(t3);

                Thread t4 = new Thread(()->{
                    System.out.println("t4:" + threadParam.get());
//                        threadParam.remove();
                });
                execService.execute(t4);

            });
            execService.execute(t);
            TimeUnit.SECONDS.sleep(1);
            //  4,  1  
            Thread t5 = new Thread(()-> {
                threadParam.set("CBA");
                System.out.println("t5:" + threadParam.get());
            });
            execService.execute(t5);
        }
    }