汽车出租

用户管理系统，可以从文件中读取，也可以从数组中读取。DB的读取方式没写全(User management system that can read from the document can also be read from the array. DB did not write the way of reading the entire)

java io体系中的File类的操作，一个个的小例子，便于初学者学习(File class in java io system operation, a small example easy for beginners to learn)

编写一个控制台程序，模拟在ATM机的存款和取款过程，当输入给定的卡号和密码（初始卡号和密码到数据文件里查看）时，系统能登录ATM系统，根据用户的身份不同显示不同的程序界面；取款 　　每次取款金额只能为100的倍数，总额不超过2000元，不允许透支。且取款之后，要记录取款的金额和时间。 存款 　　每次存款金额只能为100的倍数，总额不超过2000元。 修改密码 　　新密码长度不小于6位，不允许出现6位完全相同的情况，只有旧密码正确，新密码符合要求，且两次输入相同的情况下才可以成功修改密码。(Write a console program to simulate the ATM deposits and withdrawals process, when you enter a given number and password (the initial number and password to the data file view), the system can log in ATM systems, according to the user' s identity different display different The program interface withdrawal amount each withdrawal can only be a multiple of 100, the total does not exceed 2,000 yuan, does not allow overdrafts. And withdrawals after the withdrawal of the amount to be recorded and time. Deposit Amount per Deposit only a multiple of 100, totaling no more than 2,000 yuan. Change Password New Password length not less than six, allowed six identical situation, only the old password is correct, the new password meets the requirements, and enter the same case twice before they can successfully change the password.)

jxta 技术手册 英文版 实现java编程(jxta technical manuals English to achieve java programming)

Convert text to Binary and binary to text

车辆管理系统，可以方便的对车辆进行管理，提高效率(Vehicle management system, you can easily manage the vehicle, improving efficiency)

knn算法,java 源码实现,简单有效的算法(algorithm of knn，a simple and efficient algorithm )

Find Chain Codes in image processing

说明：  java 最 常 用 教 程，pdf 格 式(The most commonly used java tutorial, pdf format)

一款小游戏 flappybird 用java实现的(A small game named flappy bird created by java)