In the previous example of electric lights, a state mode program was completed. First, the Light class is defined, which is also called Context here. Then in Light's constructor, to create instance objects for each state class, Context will hold references to these state objects in order to delegate the request to the state objects. The user's request, that is, the action of clicking button, is also implemented in Context, with the following code:
在未来世界里，以希特为首的一群毫无环保意识的人，为满足自己的贪欲，过度地使用高科技和自然资源，自然环境的恶化，导致无数动物陷入濒临灭绝的境地，甚至危及人类的生存安全。
A PLASTIC OCEAN begins when journalist Craig Leeson, searching for the elusive blue whale, discovers plastic waste in what should be pristine ocean. In this adventure documentary, Craig teams up with free diver Tanya Streeter and an international team of scientists and researchers, and they travel to twenty locations around the world over the next four years to explore the fragile state of our oceans, uncover alarming truths about plastic pollution, and reveal working solutions that can be put into immediate effect
在古代的某个县城的衙门里，住着郭台郭县令（郭德纲饰）的父母和妻子一家人。衙门里的于师爷和三个衙役同他们一起生活，并料理衙门的日常事务。郭台作为一县之主，他为人正直，憨厚、不畏权贵仗义执言，敢于为老百姓办事。涉及到百姓的利益，他不怕得罪朝廷命官。郭台为人善良，秉公办事，在审理案件过程中，经常遇到原被告是些家不长理不短的小事，郭台为了调节这些矛盾，凡是遇到这种事情他耐心说服较劲脑汁，费劲心思。俗话说清官难断家务事，郭台为了理清这纷乱的家务事，他使劲了各种不合常理招数，来化解矛盾。因此，还不时的还被当事人误解，被人嘲笑并搭进自已的钱财。郭县令在处理各种案件时也时不时将自已的家庭卷进当事人的矛盾中而不能自拔。为此，处理这种案件中也经常闹出笑话。但是，郭台始终坚持做人的原则，化解矛盾、惩恶扬善，维护正义。县衙里的师爷为人圆滑，办案中经常给郭县令出主意，但有些主意却是不怎么聪明的馊主意，经常将郭台领向歧途。于师爷在衙门里也不时的为了自已的利益和郭台动心眼子。衙门里的三个衙役有着不同的性格有的憨厚老实
在此之后，兆邱反而对予丽更加感兴趣，他尝试走入予丽的家中，却发现这个女孩身边却充满了可以看到的鬼魂。更可怕的是，鬼魂也跟在了兆邱的身边。以此为契机，两个完全有着不同人生的人彼此渐渐了解，兆邱也开始了解予丽悲惨的过去……
喜欢做白日梦的DannyReed被闪电劈中后变身为一个女孩，从此这位普通的DIY商店小工变身成为时髦亮丽的女性时尚杂志记者——VeronicaBurton并过上了令人羡慕的风光日子。可惜Danny无所适从，细高跟鞋，女性内衣，还有Veronica的男友Jay，麻烦接踵而至。更让他头疼的是Danny对女性世界一窍不通，还得打肿脸充胖子扮演“时尚专家”
This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows:
For example, in the above column, Xiao Hong suddenly didn't want to buy shoes, so he didn't want to accept the news of the seller's store, so Xiao Hong could cancel the subscription of the store.
Cloud manufacturing provides a brand-new concept and mode for manufacturing informatization. As a nascent concept, cloud manufacturing has huge development space in the future. However, the future development of cloud manufacturing still faces many key technology challenges. In addition to the comprehensive integration of cloud computing, Internet of Things, Semantic Web, high-performance computing, embedded systems and other technologies, knowledge-based technologies such as cloud-based manufacturing resources, manufacturing cloud management engine, cloud manufacturing application collaboration, cloud manufacturing visualization and user interface are all important technologies to be overcome in the future.
The adjusted minimum wage standard in Shaanxi Province from May 1 can reach a maximum of 1680 yuan/month and a minimum of 1380 yuan/month. The part-time hourly minimum wage standard is 13.8 yuan/hour-16.8 yuan/hour. Shaanxi is classified into four categories, within this range.
上世纪20年代末，上海百货巨子易氏家族遭遇承继危机，易兴华因独子易钟杰弃商从医，被迫召回长女钟灵、次女钟玉、幼女钟秀。钟灵乃名门淑女，典雅文静。钟玉由南洋巨贾外祖抚养，精明能干。钟秀留学美国，浪漫天真。三位千金生母 不同、脾性不投、成长环境迥异，为继承星华百货，三人各出奇招，争执不休。易兴华未料三凤还巢引发轩然大波，恐伤及骨肉之情，迟迟无法选定最终继承人，反令三女间误会重重、各奔东西。上海“孤岛”时期，易兴华把握时机，星华百货空前繁盛，经营所得泰半赈济上海灾民。但好景不长，1941年日寇侵占上海，易兴华因支援抗日爱国活动、坚拒日寇拉拢而遇害，星华百货失去掌舵人，又遭遇连番重创，陷入风雨飘摇之中。易氏子女为实现父亲实业兴国的夙愿，终能团结一致，共度时艰。
She said that she could stay in the mountains for a few years without going out, just to do it well. It would be even better if the craft could be revived and passed on. After living in the city for many years, she has returned to her hometown, lived in seclusion in the mountains, and returned to the original ecological rural life. If it weren't for her heartfelt love, many people would not have been able to do this. This is also the biggest touch to us.
July 10 News "the glory of the king" officially launched a new game today to break through the border and officially opened the open test.
Originated in Egypt more than 3,000 years ago, it spread successively in Mediterranean coastal countries. The 23rd BC ancient Greek Olympics was listed as a competitive event.
四郎踏上战场，与父亲杨业一起陷入绝境，为了突破潘仁美与辽国设下的死局，杨业临死之前给四郎一个秘密任务，到辽国利
对阵项声的五千人竟然大胜，我军伤亡了几乎两千人之多，非常触目惊心。
退休钳工梁德全和退休的副局长付国祥住进同一病房。由于两人生活习惯和性格的不同，发生了很多争执。但随着接触的深入，他们成了无话不说的老哥们儿。老梁的病打破了三个子女原本安宁的生活，为了住院费，三个家庭开始猜忌争吵。老梁有几个愿望，一是找到初恋情人菊英；一个是去新疆看看大儿子。在老付的帮助下，老梁逐一实现了心愿，其间有矛盾，有悲喜，有子女的不理解。在老梁弥留之际，老付读出了他对子女生活点滴的记录和感想，老梁的子女们声泪俱下，才明白原来他们一直生活在父爱的注视中，他们的平安幸福就是老爸最后的心愿。
过去曾是黑帮成员的东哲，努力洗清黑暗的过去，和天使般善良的妻子智秀过着平凡的生活。某天妻子智秀遭到绑架。不久，一通陌生来电表示要付东哲一笔钱，要求东哲将妻子卖给他…东哲将用行动证明绑匪惹错了人！
After that, I will introduce several common basketball on the market:
A. Flight qualification;
