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  1. class RegexTest {
  2. public static void main (String[] args) {
  3. for (String segment : "!!!!![1,2,3,4,5] //"
  4. .replaceFirst("^\\D*(\\d(?:,\\d+)*)\\D*$", "$1")
  5. .split(","))
  6. System.out.println(segment);
  7. }
  8. }
Success #stdin #stdout 0.08s 380224KB
stdin
Standard input is empty
stdout
1
2
3
4
5