词法分析器，用java实现，采用的核心算法是通过函数readch()把下一个输入字符读到变量peek中，函数scan在略过所有空白字符后，首先试图识别像<=这样的复合词法单元和整数数字，如果不成功，它就试图读入一个字符。-Lexical analyzer, with java implementation, the core algorithm used by the function readch () to read the next input character variable

安卓的一个记事本,自己写的，可以设密码。避免别人偷看。虽然简陋，不过对于初学者可以修改一下为自己所用。-Andrews is a notepad, write your own, you can reset your password. Avoid others peek. Although simple, but can be modified for beginners look for their own use.