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  1. class Ideone {
  2. 	public static void main (String[] args) {
  3.       String[] strs = {
  4. "4-2-2-1",
  5. "4 -2 - 2 - 1",
  6. "1-2-3-4-5",
  7. "1-5",
  8. "4 - 5"};
  9.  
  10.       for (String s1 : strs) {
  11.         String s2 = s1.matches("(\\d+\\D+){2,}\\d") ? s1.replaceAll("\\D+", " ") : s1;
  12.         System.out.println(s2);
  13.       }
  14. 	}
  15. }
Success #stdin #stdout 0.07s 33532KB
comments (?)
stdin 
Standard input is empty
stdout 
4 2 2 1
4 2 2 1
1 2 3 4 5
1-5
4 - 5
https://ideone.com/TXFS1Y
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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