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:
羞怯，寡言少语的格鲁吉亚伯德（奎恩拉蒂法饰）是新奥尔良一间百货公司的厨具销售员，平日里安静的她除了工作，就是在教堂唱诗班唱歌，虽然梦想着和心仪的肖恩恋爱结婚，去国外旅行甚至遇见自己最喜欢的厨师，不过平凡的她也仅仅是梦想着而已。不太为人知道的是，胖胖的格鲁吉亚其实做得一手好菜，完全有超专业水准。
A DDoS attack is an attempt by an attacker to deplete resources available to a network, application, or service so that real users cannot access these resources. It is an attack by a group of malware infected computers or voluntary client computers that attempt to deplete the resources of a specific network, website or service. However, not all DDoS attacks operate in the same way.
"Poor" and "Small" texts. From the acupoint. To do. And "set" in the male cut, sound bow. Good looks. This work. Or from acupoints. Zdic.net code
由泰国抖音和泰国明星猎人Starhunter娱乐 合作三部剧不同的系列剧举行开机拜神仪式，三部系列剧分别是：悬疑系列《Bad Roommate--ล้วงลับเมท》、爱情系列《My Super Boss--ปิ๊งรักเจ้านายร้าย》、搞笑系列《Marry Me in 30 days--30วัน ฉันจะมีเธอ》。 Kwin（Junior饰）是大四学生，他完美但多疑，Kwin在调查他的合租室友Noch（Kad 饰），因为Kwin偷偷得知，Noch不是他所认为那样，在Kwin举办生日那天，他看到Noch钱包里有各个国家的钞票，怀疑他在做一些暗黑生意，并且Kwin刚好听到了一些关于Noch的传闻，为了证明Noch不是坏人，Kwin决定调查真相，从搜查Noch的手机、电脑开始，再到接近Noch，后来Kwin假装向Noch表白，Noch信以为真......
这是一次史诗般的浪漫冒险，以比利的生活为基础，从他卑微的爱尔兰血统，以及他早期在美国边境当牛仔和枪手的日子，到他在林肯县战争和其他战争中的关键角色。
他若活着，就没有人会被俘。
世界滑板冠軍保羅的車跟衝浪板被找到，但是屍體下落不明，保羅的哥哥兼經紀人布魯斯覺得弟弟的死是因為被他逼得太緊，充滿內疚的他跟四個保羅最好的朋友一起踏上公路旅行紀念他，但卻被一個罹患狂犬病的殺手捕殺，最後變成一場世紀冒險的旅行。
高凡听了满腹狐疑：这么点大的娃，知道啥叫做既来之则安之？此时，他们正在一处避风的山谷中扎营，玉米打量四周地形，全是连绵的缓坡丘陵和林地。
Compared with online institutions, first of all, customers have stronger trust in physical institutions; Secondly, offline organizations have a strong scene, making it relatively easier to manage teachers and supervise students' learning. In addition, the teacher-student interaction and student-student interaction in offline institutions are more direct and social. However, due to its strong regionality, its customers are more direct and accurate.
谁能百里挑基
她用力戳了戳自己的脑袋：最重要的东西在这。
The opposite is the product certificate and basic information.
故事发生在1942年11月的严冬，伴随着太平洋战争的爆发，世界反法西斯战争进入了新的阶段，而抗日战争也进入最为关键同时也是最为艰苦的时期。为了剿灭敌后抗日根据地的有生力量，日军向华北地区发动51大扫荡。由于缺少医护人员，中共方面募得13名爱国青年前往平西抗日根据地，结果在途中遭到日军战斗机的无情轰炸和扫射，最终只有一名女护士活了下来。大人们倒在了血泊中，伴随着战火出生的孩子们不得不拿起手中的枪。孩子们思念着妈妈的臂弯，祈祷和平的到来。他们用稚嫩无邪的双眼张望着这个血肉横飞的世界，更无奈看着自己的鲜血迸出染红天空。
The next four patterns, including this pattern, are all the relationships between classes and do not involve inheritance. When learning, you should remember induction and the diagram at the beginning of this article. The observer mode is well understood, similar to email subscription and RSS subscription. When we browse some blogs or wikis, we often see RSS icons. This means that when you subscribe to the article, you will be notified in time if there are subsequent updates. In fact, in a nutshell, when an object changes, other objects that depend on the object will be notified and will change with it! Objects are a one-to-many relationship. Let's look at the diagram first:
该剧被称作「现代童话」，故事描述游手好闲但长相迷人的Dud在父亲死后加入一个长滩兄弟会，以寻求简单幸福的生活方式。在兄弟会的宿舍里，他和其他成员逐渐建立了感情，并且找到了失去的人生目标和意义。他将直面自己内心最深的恐惧和最大的希望。其他关键角色包括Dud的双胞胎妹妹Liz Dudley和兄弟会宿舍里的长期住户Ernie Fontaine。Ernie是个黑人，他用自己的方式欢迎Dud来到这个神秘的新世界。
影片讲述了在某舞蹈学校中，几名参加培训的年轻男女无意触碰了恐怖“午夜十二点”的禁忌，之后他们进入了这个学校最神秘的127无人宿舍，紧接着恐怖灵异事件接连频发：白衣游魂、床下鬼手、夜半钟声纷纷显现，发疯、死亡的诅咒时刻笼罩着他们，而后他们意外得知127宿舍竟然是该学校的恐怖禁地，凡是午夜十二点接近该宿舍的人都将受到诅咒，他们能够顺利逃脱这个恐怖诅咒吗？
