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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		System.out.println(allowOnlyNumbers("abc123"));		
  9. 		System.out.println(allowOnlyNumbers("\u06F1\u06F2\u06F3"));	
  10. 	}
  11.  
  12. 	public static String allowOnlyNumbers(String input)
  13. 	{
  14. 	   StringBuilder sb = new StringBuilder(input.length());
  15. 	   for (int i=0; i<input.length(); i++)
  16. 	   {
  17. 	      char c = input.charAt(i);
  18. 	      if (Character.isDigit(c))
  19. 	      {
  20. 	          sb.append(c);
  21. 	      }
  22. 	   }
  23. 	   return sb.toString();
  24. 	}
  25. }
Success #stdin #stdout 0.04s 213440KB
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123
۱۲۳
https://ideone.com/hawSb
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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