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  1. import java.util.regex.Matcher;
  2. import java.util.regex.Pattern;
  3.  
  4. /* Name of the class has to be "Main" only if the class is public. */
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9.         final String regex = "<!DOCTYPE[^>\\[]*(\\[[^\\]]*\\])?>";
  10.         final String string = "<!DOCTYPE html><html></html>";
  11.         final String subst = "";
  12.  
  13.         final Pattern pattern = Pattern.compile(regex);
  14.         final Matcher matcher = pattern.matcher(string);
  15.  
  16.         // The substituted value will be contained in the result variable
  17.         final String result = matcher.replaceAll(subst);
  18.  
  19.         System.out.println("Substitution result: " + result);
  20. 	}
  21. }
Success #stdin #stdout 0.06s 3359744KB
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stdin
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Standard input is empty
stdout
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Substitution result: <html></html>
https://ideone.com/XuBFnc
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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