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使用开源工具类库com.google.zxing，实现二维码的编解码(Use of open-source tool library com.google.zxing, two-dimensional code codec)

文件浏览器 用到了流布局、网格布局 可调节图标大小(File browser use flow layout, grid layout, icon size adjustable)

XML的DTD的解析、对XML文件作用的JAVA源代码。(XML DTD parsing XML documents role of the Java source code.)

语法分析器 java版 编译课程综合训练(Java version of the compiler parser comprehensive training courses)

通过本工具可以将URL快速转换为迅雷、快车、旋风等专用下载链接(Through this tool can be quickly converted to a URL Thunder, Express, cyclones and other special download link)

说明：  和平精英除草，软件内有说明，可用不封号，如有侵权请联系我进行删除(Peace Elite weeding, the software has instructions, can be used without a seal, if there is infringement, please contact me to delete.)

1 取字符串所有汉字首字母 2 取汉字字符串的首字母(A string of all the characters take the first letter of two characters to take the first letter of a string)

猜数问题，实现了rand（）函数的随机，随着你猜的次数，他会做一个统计(The guessing problem implements the randomness of the rand () function and, as you guess, he makes a statistic)

Transaction Service extends Service implements Observer Source Code for Andriod.

初学者的图书馆管理系统，简单易懂，易于用来巩固基础知识(Library management system for beginners, easy to understand, easy to be used to consolidate the basic knowledge of)