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Yao Yao

A lover of mathematical foundations. A programmer in the best languages.

Java: final

March 25, 2009 less than 1 minute read

final data (基本数据类型)

Java Class Loading: an example

March 25, 2009 1 minute read

class loading 是一个比较复杂的过程。一般说来，类是在其 static member 被访问时被加载的。在加载时会做的一件事是：初始化 static member 和 static 代码段 (static block, i.e. static {......})，当然，static 是只会被执行 on...

Java: private、package 权限字段不可继承 + 向上转型的新理解

March 23, 2009 less than 1 minute read

base class 的 private member 是不可继承的(详细请参见 Java: 关于 class 和 class member 的访问权限)，所以在 ext class 中也不会有这些 member。

Java: overload and override / 重载与覆写

March 23, 2009 less than 1 minute read

首先看概念：

Java: initializer

March 19, 2009 1 minute read

A block-formed initializer can be appended after the fields declared.