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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.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		"this is an example string".replaceFirst("(^this )", "$1\\");
  13. 	}
  14. }
Runtime error #stdin #stdout #stderr 0.07s 380160KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 3
	at java.lang.String.charAt(String.java:658)
	at java.util.regex.Matcher.appendReplacement(Matcher.java:762)
	at java.util.regex.Matcher.replaceFirst(Matcher.java:955)
	at java.lang.String.replaceFirst(String.java:2119)
	at Ideone.main(Main.java:12)
https://ideone.com/l4SIRC
language:
Java (12.0.1)
created:
11 years ago
visibility:
public

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