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java中的正则表达式说明，供学习Java的初学者使用(java regular expression in the description)

Quartz is a full-featured, open source job scheduling system that can be integrated with, or used along side virtually any J2EE or J2SE application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs jobs whose tasks are defined as standard Java components or EJBs. The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.(Quartz is a full-featured, open source job scheduling system that can be integrated with, or used along side virtually any J2EE or J2SE application- from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs jobs whose tasks are defined as standard Java components or EJBs. The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.)

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1.什么是类?什么是对象?   1)现实世界是由很多很多对象组成的     基于这些对象，抽出了类   2)类:类型、类别，代表一类个体     对象:一个独立的个体   3)类是一种数据类型(引用类型)   4)类中可以包含:     4.1)所有对象所共有的属性/特征----变量     4.2)所有对象所共有的行为---------方法   5)一个类可以创建多个对象     同一个类创建的对象，结构相同，数据不同   6)类是对象的模板，对象是类的具体的实例 2.如何创建类?如何创建对象?----代码操作 3.引用类型之间画等号:指向同一个对象

这是一个用java开发的图形化计算器。功能很强大，对于想了解java GUI的编程爱好者很有帮助。-it is a calculator developing by java.it is very helpful for these wanting to have a knowledge of java GUI

jsp设计网上选课系统，有学生、老师、管理员三种身份，实现不通的功能。连接MySQL数据库，包含系统源码和数据库设计代码，完整！(jsp system design online course, students, teachers, administrators three status, the achievement of barrier function. MySQL database connectivity, including system design and database source code, complete!)

基于决策树实现的AdaBoost分类器，是一个由多个弱分类器进行训练生成强分类的过程。(Based on AdaBoost classifier tree implementation, is a plurality of weak classifiers in the training process generates a strong classifier.)

Java应 用 教 程(Java Application Directory)

java实现的中文分词功能，用map / reduce的方式对中文进行分词

一个简单圆，有圆心半径，已知半径，求周长和面积。已知某点求是否在圆上。(A simple circle, a circle radius, known radius, strives for the pupil. Known to some point whether in the round.)