本程序使用JAVA实现文法类型判断功能，基本原理是根据乔姆斯基文法中文法类型的定义，进行判断给定的文法属于哪一类文法。通过判断产生式左右部给定的字符长度，以及是否是非终结符等进行判断，总之要紧扣每个文法类型的定义-procedures for the use of the grammar type JAVA judgment function, the basic principle is under Chinese law Chomsky grammar type of definition, to judge the grammar which type of grammar. Judging by the Ministry of Production about the characters to the length, and whether non-end Website judgment, In short grammar should fasten each type of definition