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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. 		String[] strings = { "987abc<*(123", "", "123", "test", "abc123" };
  12.         Pattern pattern = Pattern.compile("(\\d)\\d*\\D*$");
  13.  
  14.         for (String s : strings) {
  15.             Matcher matcher = pattern.matcher(s);
  16.             if (matcher.find()) {
  17.                 System.out.printf("'%s' --> %d\n", s, matcher.start(1));
  18.                 continue;
  19.             }
  20.             System.out.printf("'%s' --> %d\n", s, 0);
  21.         }
  22. 	}
  23. }
Success #stdin #stdout 0.08s 48680KB
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stdin
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Standard input is empty
stdout
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'987abc<*(123' --> 9
'' --> 0
'123' --> 0
'test' --> 0
'abc123' --> 3
https://ideone.com/TcevP3
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
secret

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