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引用数据类型：Java中只有两种数据类型：基本数据类型和引用数据类型，所以除了基本数据类型以外的所有类型都可以归结到引用数据类型中。基本类型可以作为成员变量、作为方法的参数以及作为方法的返回值，那么当然引用类型也是可以的。今天讲三种引用数据类型作为方法的参数和返回值：普通类、抽象类以及接口。普通类-...

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Java 值类型与引用类型神奇的toString()方法

1. 前提首先，Java中的类型分为值类型与引用类型，具体区别是：值类型（如int、double）变量中保存的是值，例如int i=1;中，i保存的是1。引用类型（如String）变量中保存的是地址，例如String str="1&#...

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