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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. 		List<String> strs = Arrays.asList("*123#","*1*2*3#","*1#23#","***123###","*12**3#");
  11. 		Pattern pat = Pattern.compile("(?:\\*\\d+)+#");
  12. 		for (String str : strs) {
  13. 			System.out.println(str + ": " + pat.matcher(str).matches());
  14. 		}
  15.  
  16.  
  17. 	}
  18. }
Success #stdin #stdout 0.1s 28024KB
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stdin
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Standard input is empty
stdout
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*123#: true
*1*2*3#: true
*1#23#: false
***123###: false
*12**3#: false
https://ideone.com/aBxpHb
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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