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组合模式和继承模式的区别

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3＇30"

#1 Created at ... [Delete] [Delete and Lock User]

按照《Java编程思想》的观点，就是 is-a(是一个) 和 has-a(有一个) 的区别

3＇30"

#2 Created at ... [Delete] [Delete and Lock User]

组合：有一个

继承：是一个

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