FutureTask 從源碼分析爲何會線程阻塞

實例demo FutureTask task = new FutureTask(new Callable(){ public Object call(){ //.... return new Object(); } }); task.run(); //這步會阻塞等待 task.get(); 問題：爲何線程會在task.get()阻塞等待?node

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