class MyObject{ private Queue queue = new ConcurrentLinkedQueue(); public synchronized void set(String s){ while(queue.size() >= 10){ try { wait(); } catch (InterruptedException e) { e.printStackTrace(); } } queue.add(s); notify(); } } class Producer implements Runnable{ private MyObject myObj; public Producer(MyObject myObj) { this.myObj= myObj; } @Override public void run() { // 每条线程执行30次set for (int i = 0; i < 30; i++) { this.myObj.set("obj:" + i); } } } public static void main(String[] args){ Producer producer = new Producer(new MyObject()); // 生成30条线程 for (int i = 0; i < 10; i++) { Thread thread = new Thread(producer); thread.start(); } // 运行结果是只set了30次 }

我的疑惑是notify()發布通知，為什麼不會讓其他執行緒的wait()方法繼續執行下去呢？