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                ## 封裝 方法也屬于封裝的一種,類、包也屬于封裝的一種 ### java中的核心思想中的封裝 是指隱藏對象的屬性和實現細節,僅對外提供公共訪問方式;比如電腦機箱 對外提供 pulbic 修飾的 getXX() 和 setXX() ### 好處: 將變化隔離; 方便使用; 提高復用性; 提高安全性
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