川落雪 (《莽荒纪》电视剧及同名手游推广曲) 21百分比 专辑：川落雪 语种：国语
How does jvm know what class an object is an instance of at runtime. I know we can use th开发者_运维知识库e getClass method to get the class name but how does the getClass method work?
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