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有时候，我们可能需要对一组数据进行分类，比如进行食物菜单分类而且希望这些菜单都属于food类型，appetizer(开胃菜)、mainCourse(主菜)、dessert(点心)、Coffee等，每种分类下有多种具体的菜式或食品，此时可以利用接口来组织，如下(代码引用自Thinking in Jav...

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到此对于抽象类Enum类的基本内容就介绍完了，这里提醒大家一点，Enum类内部会有一个构造函数，该构造函数只能有编译器调用，我们是无法手动操作的，不妨看看Enum类的主要源码：//实现了Comparable public abstract class Enum<E extends Enum&l...

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JDK1.5引入了新的类型——枚举。在 Java 中它虽然算个“小”功能，却给我的开发带来了“大”方便。大师兄我又加上自己的理解，来帮助各位理解一下。用法一：常量在JDK1.5 之前，我们定义常量都是： public static fianl....&n...

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