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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.regex.Matcher;
  7. import java.util.regex.Pattern;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class Ideone
  11. {
  12. 	public static void main (String[] args) throws java.lang.Exception
  13. 	{
  14. 	    String input = "<title>Replacing keywords with keyword</title>\n"+
  15. "<body>\n"+
  16. "<h2>Titles</h2>\n"+
  17. "<p>Par with keywords and keyword</p>\n"+
  18. "<h2>Titles</h2>\n"+
  19. "<p>Par with keywords and keyword</p>\n"+
  20. "</body>";
  21.         String regex = "(?s)(<\\/h2.+)\\b(keyword)\\b(?=.*<\\/h2>.*$)";
  22.         String keytoreplacewith = "NEW_COOL_KEYWORD";
  23.         String output = input.replaceFirst(regex, "$1"+keytoreplacewith);
  24.         System.out.println(output);
  25. 	}
  26. }
Success #stdin #stdout 0.1s 320256KB
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stdin
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Standard input is empty
stdout
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<title>Replacing keywords with keyword</title>
<body>
<h2>Titles</h2>
<p>Par with keywords and NEW_COOL_KEYWORD</p>
<h2>Titles</h2>
<p>Par with keywords and keyword</p>
</body>
https://ideone.com/EALONW
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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