课程名称︰物件导向程式设计 课程性质︰系定必修 课程教师︰陈俊良 开课学院：电资学院 开课系所︰资讯工程学系 考试日期（年月日）︰2009/6/15 10:00~12:00 考试时限（分钟）：120分钟 是否需发放奖励金：是 试题 : Examination of Object-Oriented Programming 2009/06/15, NTUCS&IE 1. As we know, abstract classes cannot be instantiated. Can abstract classes have constructors? Explain your reason briefly (at most 5 lines). [5%+10%] 2. A way to create a thread is to declare a new class, say MyThread, that extends class Thread. Class MyThread then overrides the run() method. For example, class MyThread extends Thread { public void run() { // the code of the new thread } } The following code would then create a thread and start it running. new MyThread().start(); If you forget to override the run() method, what will happen? Explain your reason briefly (at most 5 lines). [5%+10%] 3. Is it possible that, at a time, one thread invokes a synchronized method while the other thread invokes another synchronized method of the same class? Explain your reason briefly (at most 5 lines). [5%+10%] 4. Please describe the exception handling mechanism of Java (at most 10 lines). [15%] 5. Please describe the operation of event-listener programming model (at most 10 lines). [15%] 6. Please describe the concept of object-oriented programming in detail (no line limitation). [25%] --

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