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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		System.out.println("0123456789ABCDEF".replaceAll("(?<=..)(..)", ":$1"));
  9. 	}
  10. }
Success #stdin #stdout 0.07s 381248KB
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01:23:45:67:89:AB:CD:EF
https://ideone.com/PpZza4
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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