在官方源码基础上，修改了几处可能抛出异常和不识别文法的bug，更加健壮稳定。-In an official source on the basis of a few modifications may throw an exception and does not recognize the grammar bug, more robust and stable.

解释器，词法分析，语法分析，显示行号，异常报错，功能完善-interpreter lexer analyze parser analyze including exception ,show line numbers ,function is strong , using java program languages , create it to CMM program language