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

Java: abstract

April 2, 2009 less than 1 minute read

abstract 的真正含义是“阻止产生对象” (针对类) 或是 “禁止被对象所拥有” (针对方法，类似 static)。

March 27, 2009 1 minute read

先上代码 (adapted from Chapter 8, Thinking in Java, Fourth Edition)：

March 27, 2009 less than 1 minute read

在 overload and override: 重载与覆写里面提到过，如果在 base class 中有一个可继承的方法，在 ext class 中添加一个同签名的方法则是覆写行为。其实，覆写对 return type 还是有要求的。

March 27, 2009 less than 1 minute read

2021-01-03 更新：大一统至 Single Dispatch in Java and Python

March 27, 2009 less than 1 minute read

2021-01-03 更新：大一统至 Single Dispatch in Java and Python