java regex match any integer or double then replace non number/decimal characters -

i trying match string integer or double then, if not match, want remove invalid characters make string valid integer or double (or empty string). far, have print 15- not valid

string anchorguyfield = "15-";  if(!anchorguyfield.matches("-?\\d+(.\\d+)?")){ //match integer or double         anchorguyfield = anchorguyfield.replaceall("[^-?\\d+(.\\d+)?]", ""); //attempt replace invalid chars... failing here     } 

you can use pattern() , matcher() validate if string suitable covertion int or double:

public class match{     public static void main(string[] args){         string anchorguyfield = "asdasda-15.56757-asdasd";          if(!anchorguyfield.matches("(-?\\d+(\\.\\d+)?)")){ //match integer or double             pattern pattern = pattern.compile("(-?\\d+(\\.\\d+)?)");             matcher matcher = pattern.matcher(anchorguyfield);             if(matcher.find()){             anchorguyfield = anchorguyfield.substring(matcher.start(),matcher.end());             }         }         system.out.println(anchorguyfield);     } } 

with:

anchorguyfield = anchorguyfield.replaceall("[^-?\\d+(.\\d+)?]", ""); 

you delete content wanted match string, insted of 15 15-, should -