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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. import java.util.regex.Matcher;
  5. import java.util.regex.Pattern;
  6.  
  7. class Ideone
  8. {
  9. 	public static void main (String[] args) throws java.lang.Exception
  10. 	{
  11. final String regex = "(?<=cardNo\\\"?\\s?:\\s?\\\"\\d{0,100})\\d(?!\\d{0,3}\\\")";
  12.         final String string = "cardNo\":\"10929291929312911131\"\n"
  13. 	 + "(cardNo:\"10929291929312911131\",cardType:\"CREDIT\")\n"
  14. 	 + "\"cardNo\" : \"10929291929312911131\" \n"
  15. 	 + "creditCardData(cardNo: \"10929291929312911131\",cardType:\"CREDIT\") –";
  16.         final String subst = "X";
  17.  
  18.         Pattern pattern = Pattern.compile(regex);
  19.         Matcher matcher = pattern.matcher(string);
  20.  
  21.         String result = matcher.replaceAll(subst);
  22.  
  23.         System.out.println(result);
  24. 	}
  25. }
Success #stdin #stdout 0.11s 51620KB
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stdin
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Standard input is empty
stdout
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cardNo":"XXXXXXXXXXXXXXXX1131"
(cardNo:"XXXXXXXXXXXXXXXX1131",cardType:"CREDIT")
"cardNo" : "XXXXXXXXXXXXXXXX1131" 
creditCardData(cardNo: "XXXXXXXXXXXXXXXX1131",cardType:"CREDIT") –
https://ideone.com/8gldyN
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
secret

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