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  1. import java.util.regex.*;
  2.  
  3. class Example {
  4.  
  5.     public static void main(String[] args) throws Exception
  6.     {
  7.        String input = "the current time is <start time>00:00:00<end time>. at 00:00:00 there is a firework. Another appearance of 00:00:00.";
  8.        String result = input.replaceAll("(?<!<start time>)00:00:00(?!<end time>)", "<start time>00:00:00<end time>"); 
  9.        System.out.println(result);
  10.     }
  11. }
Success #stdin #stdout 0.1s 27872KB
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Standard input is empty
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the current time is <start time>00:00:00<end time>. at <start time>00:00:00<end time> there is a firework. Another appearance of <start time>00:00:00<end time>.
https://ideone.com/ynpV4j
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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