在编写处理字符串的程序或网页时,经常会有查找符合某些复杂规则的字符串的需要。正则表达式就是用于描述这些规则的工具。换句话说,正则表达式就是记录文本规则的代码。很可能你使用过 Windows/Dos 下用于文件查找的通配符(wildcard),也就是*和?。如果你想查找某个目录下的所有的 Word 文档的话,你会搜索*.doc。在这里,*会被解释成任意的字符串。
An environment for developing and deploying enterprise applications.The J2EE platform consists of a set of services, application programming interfaces (APIs), and protocols that provide the functionality for developing multitier, web-based applications.
One should make sure that all the included objects are also serializable. If any of the objects is not serializable then it throws a NotSerializableException.
Whenever an object is to be sent over the network, objects need to be serialized. Moreover if the state of an object is to be saved, objects need to be serilazed.