Happy Captcha是一款易于使用的Java验证码软件包，旨在花最短的时间，最少的代码量，实现Web站点的验证码功能。Happy Captcha完全遵循Apache 2.0开源许可协议，你可以自由使用该软件，如您在使用Happy Captcha时发现软件的任何缺陷，欢迎随时与我联系。

ToolGood.Algorithm is a powerful, lightweight, Excel formula compatible algorithm library aimed at improving developers’ productivity in different business scenes. ToolGood.Algorithm是一个功能强大、轻量级、兼容Excel公式的算法类库，旨在提高开发人员在不同业务场景中的生产力。

A 128-bit floating-point arithmetic for Java

A collection of some of the amazing cryptographic Ciphers in C++, Python and Java with a detailed documentation and approach map. (Particularly helpful for Blockchain. and designing Encryption Algorithms)

📝 Java Base Learning

An algorithm based on Java implementation, can automatically check the set of outliers in a set of data, eliminate these outliers, and finally get normal data.基于java实现的能够自动检查出一组数据中的异常值的集合，剔除这些异常集，得到正常数据。

This is a JPEG implementation in Java featuring encoder, decoder and transcoder including support for arithmetic entropy compression

管道铺设项目(算法三级项目)

A simple library that aims to be able to do all the stuff that a scholar calculator can do.

My solutions for Quera College course

Implementation of library dedicated for p-adic numbers computation with basic operations in java.

Farenheit and Celsius temperature numpad (Java GUI) program created for university.

【Android游戏】《斗地主》，练习自定义View的绘制和Xml文件解析。

【Android Demo】音乐播放器，用于学习Service、Broadcast Receiver、Content Provider、MediaPlayer以及第三方API接入。

A modularised Java library with functionality: for fixed point and arbitrary precision arithmetic; matrices; getting prime numbers; and, generating pseudorandom numbers.

数据结构与算法

算法总结

📝 Java recursive descent parser for arithmetic expressions with operator precedence and parentheses.

Insert Java programs here.