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:
刘南生（刘德华饰）——社交舞教师，温文尔雅，英俊潇洒，舞艺精堪之余，更待人亲善。一套舞蹈哲学，令不少学生从拾自信。在这个缺乏自信的年代，南生简直就是苦海明灯，一代良师，但只限活于舞台上。当他摘下其华丽伪装后，刻薄成性，当一众学生如羊股一般，极尽其诱骗的能事。在多年以后南生不知不觉亦欺骗了自己，渐渐忘记了舞蹈的意义，甚至自己的人生意义……直至一天，南生遇上了阿金！
此剧讲述了一对有女儿的夫妻的惊悚故事。崔尚烈导演执导,林在一编剧执笔,将在下半年播出。
神秘的电子邮件，是黑客入侵?是恐吓勒索?还是病毒?可怕的放射物质外泄，是恐怖事件?还是意外事故？大案重案，一案接一案，案情扑朔迷离，危机四伏。公安刑警杨震打入犯罪集团做卧底，突然面临被识破的危险，季洁、郑一民率重案六组刑警紧急前往解救。面对一系列高科技犯罪案，重案六组全力追查，真相一步步浮出水面。
转校生小雨在父母的安排下转入一所女子高中，在这里她不仅收获了自己的恋情，还人是了一群性格迥异的女孩
Summary: This Daniel, I think you may have accumulated a lot in. NET and done a good job, attracting a large number of fans. I admire you very much. However, you may not know much about in-depth learning. For an area that you don't know very well, you are not modest here, turn a deaf ear to other people's suggestions, and are also very proud to swear at "spitting". I'm afraid you still need to be more modest and learn more. Judging from the working age, I am your successor, but judging from the field of in-depth study, you may still be a newcomer, don't you think? And so far, you have sent two articles on the front page, none of which have any dry goods. I hope you can hit me in the face with dry goods quickly.
Public class Example
一场紧张、刺激、惊险的战斗即将开始，天狼星人能否在地球少年的帮助下打败邪恶外星势力并重返天狼星？“天狼号”的超级能源成长后会有什么样炫酷的变化？
TV动画《#新干线变形机器人SHINKALION Z#(第二部)》，将于2021年春季播出！
鼓楼外一位老木匠易大船的大徒弟于钟声和其孙女易小船偷偷恋爱了，吃醋的二徒弟尹东义给于钟声使坏，在邻居家房梁上做了手脚。于钟声上当以致屋里的孩子死亡，锒铛入狱。狱外，心里还爱着于钟声的易小船迫于种种无奈嫁给了尹东义，而狱中的于钟声得知此消息悲愤交加，誓言报仇。出狱后的于钟声开始和尹东义“死磕”，不论尹东义干什么，他都要将其击倒。看着因他二人争斗而痛苦不已的小船和亲人们，于钟声和尹东义终于渐渐明白了这个道理。当于钟声与易小船走进结婚的礼堂，尹东义毅然走进公安局，为他陷害师兄事件投案自首。
正在此时，侧门之内走进来一男一女，当先的是个三十多岁的贵妇人，目泛泪光呼唤道：子夜。
娶妻当娶任盈盈？任盈盈是最完美的妻子？看到蛋疼哥的这个帖子，大家顿时有些愣住了。
距离自动步枪和机械化部队还很远，一步一步，首先要搞定眼前的燧发枪，逐步优化，当射速和威力到达一定程度，再多的日本武士也将死在冲锋的途中。
I myself am an opponent of this view, "a latest study." What study is this? [Researcher] What kind of researcher is this? There are many things that are actually meditated by irresponsible people such as laymen or editors of health magazines, and even deliberately put forward some seemingly novel and constructive opinions. Are you a researcher who stays on the weightlifting team every day and follows the strength lifters to train and track the competition every day? Don't pick up the window sill and see the training of the professional team with two eyes, so you dare to extend these eyes to common training methods.
物欲至上的颓废时代，人们贪图享乐，追逐虚幻，也自然要为自己的放纵买单。在狂乱的社会里，高利贷公司CowCow Finance的事业继续蒸蒸日上。社长丑岛馨（山田孝之 饰）的脸上依然看不到一丝体恤和同情，在柄崎（やべきょうすけ 饰）和高田（崎本大海 饰）两位助手的鼎力支持下，任何企图挥霍钱财尽情享乐却不愿偿还债务的丧德者都无法遁形，何况此次丑岛还有身为情报通的同学戌亥（绫野刚 饰）助拳，各类隐秘消息自然悉收眼底。明知是地狱，偏向地狱行，死神一般的丑岛冷冷注视着这群愚昧众生，心甘情愿跳入血肉模糊的绞肉机之中……
刑警队长方志诚在完成一项九死一生的追捕任务后，发现身为记者的妻子神秘失踪，于是，他踏上了危机四伏的寻妻行程。当他排除重重迷障，渐渐查清妻子失踪真相时，却发现了一个惊人的秘密，可此时，他和妻子都已深陷绝境之中无法自拔，面临着迫在眉睫的死亡威胁。一个将政府、公安、法院尽收麾下的黑帮集团露出水面，其操控者李梓、竟使市长、公安局长、法院院长俯首称臣。生死之地，黑幕遮天，社会秩序濒临崩溃。战绩显赫的刑警队长，竟被诬陷沦为阶下囚，于黑白两道重重追杀中苦苦求生，唯一生路是将这个秘密大白于天下……
在斯德哥尔摩人的一生中，友谊、悲伤和浪漫与爱交织在一起。
太平洋战争最惨烈一役，扭转第二次大战战局的硫磺岛……
/surrender
