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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. import java.util.regex.*;
  5.  
  6. class Ideone
  7. {
  8. 	public static void main (String[] args) throws java.lang.Exception
  9. 	{
  10. 		String s = "range (bar | thumb_1 | thumb_2 | fill)\nrange(bar|thumb_1|thumb_2|fill)\n.root.range.bar";
  11. 		System.out.println(s.replaceAll("(?<!\\.)\\b\\w+", ".$0")); 
  12. 	}
  13. }
Success #stdin #stdout 0.1s 27772KB
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stdin
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Standard input is empty
stdout
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.range (.bar | .thumb_1 | .thumb_2 | .fill)
.range(.bar|.thumb_1|.thumb_2|.fill)
.root.range.bar
https://ideone.com/fuZP1D
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
secret

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