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说明：  从C++，Java到C#，将这三种编程语言，从语法到风格进行简单的介绍。(From the C++, Java to C#, these three kinds of programming language, from grammar to style a simple introduction.)

自从Adobe公司1993年第一次发布公共PDF参考以来，支持各种语言和平台的PDF工具和类库就如雨后春笋般涌现。然而，Java应用开发中Adobe技术的支持相对滞后了。 　　自从Adobe公司1993年第一次发布公共PDF参考以来，支持各种语言和平台的PDF工具和类库就如雨后春笋般涌现。然而，Java应用开发中Adobe技术的支持相对滞后了。这是个奇怪的现象，因为PDF文档是企业信息系统存储和交换信息的大势所趋，而Java技术特别适合这种应用。然而，Java开发人员似乎直到最近才获得成熟可用的PDF支持。 　　PDFBox（一个BSD许可下的源码开放项目）是一个为开发人员读取和创建PDF文档而准备的纯Java类库。它提供如下特性： 提取文本，包括Unicode字符。 和Jakarta Lucene等文本搜索引擎的整合过程十分简单。 加密/解密PDF文档。 从PDF和XFDF格式中导入或导出表单数据。 向已有PDF文档中追加内容。 将一个PDF文档切分为多个文档。 覆盖PDF文档。(The Apache PDFBox library is an open source Java tool for working with PDF documents. This project allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents. Apache PDFBox also includes several command-line utilities. Apache PDFBox is published under the Apache License v2.0.)

jsp 实现的火车售票系统 课程作业 需要的可以下载看看(jsp realization train ticketing system)

Java source code for optimization toolkit,including LU,mentacarlo etc(Java source code for optimization toolkit , including LU, mentacarlo etc.)

该项目包含一组并发和高可伸缩性的工具类，可用于直接替换 java.util.* 或者是 java.util.concurrent.* 集合包，在多 CPU 环境下提供更好的性能。(The project includes a set of concurrency and high scalability tools can be used to directly replace java.util.* Or the java.util.concurrent.* Collection package to provide better performance in a multi-CPU environment.)

Rancore Technologies Pvt Ltd, Mumbai India.

JDK 1.5 的介绍。对于JAVA编程的函数的应用很有帮助(JDK 1.5 . it is very useful in JAVA programming)

遍历储存卡内所有图片，放到控件中显示。点击图片跳转到编辑页面。并做了代码优化。(Traverse all the pictures in the memory card, into the control display. Click on the picture to jump to edit pages. And do a code optimization.)

The C Programming Language若干行代码网络平台输出测试(A "Hello, World!"program generally is a computer program that outputs or displays the message "Hello, World!". Such a program is very simple in most programming languages, and is often used to illustrate the basic syntax of a programming language. It is often the first program written by people learning to code.)

Hades (HAmburg DEsign System) is a pure-Java framework for interactive simulation, especially for digital system simulation. It includes a graphical schematics editor, several simulation engines, and a library of simulation models.