Java string: how do I get the value of X, Y, and Z from a string "vt X,Y,Z"

how do I get the value of X, Y, and Z from a string "vt X,Y,Z"

From stackoverflow

• As long as the format stays simple like that, I'd use

  String s = "vt X, Y, Z";
  String[] values = s.split("[ ,]+");
  String x = values[1];
  String y = values[2];
  String z = values[3];
  

  If the format has more flexibility, you'll want to look into using either a regular expression (the Pattern class) or creating a parser for it using something like ANTLR

  William : Will it work with Z? Z doesn't have a , after it.

  Tom : Yes William, that will work with Z... the split method takes a regex, and "[ ,]+" means "one or more, spaces OR commas" So any sequence of spaces and commas will be split on.

• Regular expressions could be used for this easily, as long as your format stayed consistent in terms of whitespace and comma delimiters.

• I'd probably opt for a regular expression (assuming X, Y, and Z are ints):

  Pattern p = Pattern.compile("vt ([0-9]+),\\s*([0-9]+),\\s*([0-9]+)");
  Matcher m = p.match(line);
  if (!m.matches())
    throw new IllegalArgumentException("Invalid input: " + line);
  int x = Integer.parseInt(m.group(1));
  int y = Integer.parseInt(m.group(2));
  int z = Integer.parseInt(m.group(3));
  

  This gives you better handling of invalid input than a simple split on the comma delimiter.

  basszero : ([0-9]+) if you want to support numbers with more than one digit