用java编写的简易词法分析程序,能够识别关键字/标识符/整数/浮点数/运算符/界符以及错误的标识符-Prepared using simple lexical analysis of java programs, to identify keyword/identifier/integer/float/operator/sector identifier symbol and error

选取一个浮点数，并产生一些随机数，把浮点数转化为整数型-Select a float, and generate some random numbers, the floating-point number into integer