日期类的使用      摘要: 对Java基础类的Date和Calendar类有些生疏了，使用的时候还是现查的javadoc。
随手记下来吧。  阅读全文

Java：reflection      摘要: reflection的学习，英文原文已贴过。  阅读全文

Reflection(转英文原文)      摘要: The reflection library gives you a very rich and elaborate toolset to write programs that manipulate Java code dynamically. This feature is heavily used in JavaBeans, the component architecture for Java (see Volume 2 for more on JavaBeans). Using reflection, Java can support tools like the ones to which users of Visual Basic have grown accustomed. In particular, when new classes are added at design or run time, rapid application development tools can dynamically inquire about the capabilities of  阅读全文

关于实现序列化接口的类提示没有定义serialVersionUID域      摘要: 摘要:在实现序列化接口的类提示没有定义serialVersionUID域时，警告信息
The serializable class XXX does not declare a static final serialVersionUID field of type long

该信息的原因和在IDE中去掉该警告的方法  阅读全文

随机验证码      摘要: 摘要:一个生成随机验证码的程序  阅读全文