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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:主人公是花道名门「月島流」本家出生，集聚美貌才能财力家室的天之骄女・月島桃（石原）。然而却在婚宴当天发现婚约者出轨。变得不相信男人的月島面前偶然出现的是口齿笨拙,做事也不聪明，成年后就没和女生交往过的平凡自行车店主 ・風間直人（峯田和伸）。钟无艳的脸上有一块红色的胎记，模样十分可怖，令齐宣王敬而远之，与此同时，齐宣王迷恋上了拥有天仙般美貌的夏迎春（陈敏芝 饰），答应立她为后，一时间，齐宣王没了主意。最终，齐宣王同时迎娶了两位女子，分别立她们为“东宫”和“西宫”，开始了“有事钟无艳，无事夏迎春”的荒诞生活。钟无艳虽然丑陋，却有着一颗善良的赤子之心，而夏迎春则在背地里筹划了一个阴谋，想要陷齐宣王于不义之中。Resolving: Find the absolute path to the file;The second season of "Charming China City" has been upgraded completely, "Charming China City? The establishment of the" City Alliance "and the official launch of the" Charming Card "program mean that there is a broad prospect for the deep integration of culture and tourism, and the sustainable development of the city will also usher in a new breakthrough. CCTV's combination of boxing to help the poor through tourism shows the sense of responsibility and mission of the national big station.2. The turnover rate is as high as 300%, and the customer turnover rate is as high as 90%. Fashion, freshness and delicious experience are integrated, and the customer conversion rate is extremely high.