随笔分类 -  java

Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(十四)之Type Information
摘要：Runtime type information (RTTI) allow you to discover and use type information while a program is running This take two forms: 1. "traditional" ... 阅读全文
posted @ 2016-01-25 15:59 nicke 阅读(290) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(十三)之Strings
摘要：Immutable Strings Objects of the String class are immutable. If you examine the JDK documentation for the String class, you’ll see that every method... 阅读全文
posted @ 2016-01-22 11:02 nicke 阅读(611) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(十二)之Error Handling with Exceptions
摘要：The ideal time to catch an error is at compile time, before you even try to run the program. However, not all errors can be detected at compile time... 阅读全文
posted @ 2016-01-19 12:56 nicke 阅读(416) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(十一)之Holding Your Objects
摘要：To solve the general programming problem, you need to create any number of objects, anytime, anywhere. So you can't rely on creating a named referen... 阅读全文
posted @ 2016-01-14 23:46 nicke 阅读(307) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(十)之Inner Classes
摘要：The inner class is a valuable feature because it allows you to group classes that logically belong together and to control the visibility of one wit... 阅读全文
posted @ 2016-01-12 12:10 nicke 阅读(259) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(九)之Interfaces
摘要：Interfaces and abstract classes provide more structured way to separate interface from implementation. the abstract class, which is a kind of midway ... 阅读全文
posted @ 2016-01-08 13:27 nicke 阅读(315) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(八)之Polymorphism
摘要：Polymorphism is the third essential feature of an object-oriented programming language,after data abastraction and inheritance.It provides another d... 阅读全文
posted @ 2016-01-07 23:08 nicke 阅读(273) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(八)之Reusing Classes
摘要：The trick is to use the classes without soiling the existing code. 1. composition--simply create objects of your existing class inside the new class.... 阅读全文
posted @ 2015-12-31 23:42 nicke 阅读(272) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(七)之Access Control
摘要：Access control ( or implementation hiding) is about "not getting it right the first time."refactoringa primary consideration in object-oriented design... 阅读全文
posted @ 2015-12-29 22:55 nicke 阅读(436) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(六)之Initialization & Cleanup
摘要：Two of these safety issues are initialization and cleanup. initialization -> bug cleanup -> running out of resources (most notably, memory) Java ... 阅读全文
posted @ 2015-12-26 22:56 nicke 阅读(368) 评论(0) 推荐(0)
ValidForm.js的使用注意点
摘要：dataType的值不能为"", 否则会导致错误发生：Uncaught TypeError: Cannot read property '0' of null，http请求可以发送，但是callback不能触发 阅读全文
posted @ 2015-12-17 12:00 nicke 阅读(316) 评论(0) 推荐(0)
Thinking in Java,Fourth Edition(Java 编程思想,第四版)学习笔记(四)之Operators
摘要：At the lowest level, data in Java is manipulated using operatorsUsing Java Operators An operator takes one or more argument and produces a new valu... 阅读全文
posted @ 2015-12-14 23:04 nicke 阅读(578) 评论(0) 推荐(0)
安装JDK后，未设置Path，也能执行java.exe的原因
摘要：安装JDK时，自动将java.exe复制到C:\Windows\System32下 阅读全文
posted @ 2015-12-10 17:20 nicke 阅读(376) 评论(0) 推荐(0)