In a java regex, how can I get a character class e.g. [a-z] to match a - minus sign?

Question

Pattern pattern = Pattern.compile(\"^[a-z]+$\");
String string = \"abc-def\";
assertTrue( pattern.matcher(string).matches() ); // obviously fails

I

Answer 1

This works for me

   Pattern p = Pattern.compile("^[a-z\\-]+$");
   String line = "abc-def";
   Matcher matcher = p.matcher(line);
   System.out.println(matcher.matches());  // true