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那人不过就是田大哥的表妹。三个刚踏出校门的年青人，面对事业、爱情的挑战，三人一面在事业上互相竞争，尽显少年人初出茅庐的朝气斗志，另一面，三人又互相支持，追求爱情上理想对象，闹出不少情场笑话。在苦乐参半的青春道上，印证了年轻岁月的纯真友谊。D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:Let's go on to discuss design patterns. In the previous article, I finished five creative patterns. At the beginning of this chapter, I will talk about the following seven structural patterns: adapter pattern, decoration pattern, agent pattern, appearance pattern, bridging pattern, combination pattern and meta-sharing pattern. The adapter pattern of the object is the origin of various patterns. Let's look at the following figure:那个时候无论怎么鼓舞士气似乎都起不到作用，反倒是有很多士兵呼喊着让韩元帅回来。I got stacked/beaten first这事结果如何，完全跟咱们不相干，都是她自己作出来的。