Split a infix String to an array of String in java -


i working on mini scientific calculator works on infix postfix algorithm. input infix string .. , infix postfix conversion logic requires array of string. how can split infix string this: 

 100+(0.03*55)/45-(25+55)

to array of string in each operand , operator array element. 

 "100" , "+" , "(" , "0.03" , "*" , "55" , ")" , "/" , "45" , "-"

and on...

note there no space in string can't split on basis of regex " ".

here's algorithm use:

start empty string array, , empty string buffer

  • walk character 0 character n
  • for current character determine type (digit/period, open paren, close paren, math operators)
  • if current character type same last character type
  • add current character buffer
  • if not same, put buffer array of string, , start new buffer

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