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Not expected: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:When making exposure compensation, if the photo is too dark, the exposure value should be increased. Every 1.0 increase in the exposure value is equivalent to doubling the amount of light ingested. If the photo is too bright, the exposure value should be reduced. Every 1.0 decrease in the exposure value is equivalent to doubling the amount of light ingested.Strength +50约翰·达顿是达顿家族的一家之长，坐拥着美国最大的牧场，与牧场毗邻的有美国首个国家公园、印第安人保留地以及土地开发商买下的地皮。在一次因牲畜误入印第安人保留地引起的争端中，不幸的意外伤亡事件发生，一场涉及多方的争端在蒙大拿州这片美丽的土地上拉开了序幕。(three) voluntary dissolution or termination according to law;