J2ME数字游戏，在手机屏幕上不同位置出现不同数字，测试你的反应速度-J2ME numbers game, different positions on the phone screen there are different numbers, test your reaction speed

是个简单的数字应用签名软件，里面还有相应的文档和使用说明，有数字签名功能还有计算摘要功能-Is a simple application of digital signature software, and the corresponding documents and instructions, have the function of digital signature and computing the function