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Java中类是描述了一组有相同特性（属性）和相同行为（方法）的一组对象的集合的原因是什么？

在java当中如何理解添加对象到集合

集合是指类的集合还是对象的集合啊，能否举个简单的例子?

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更新时间 2024-01-29 10:51:01

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