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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. import java.util.regex.*;
  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. System.out.println(check("9+56"));
  13. System.out.println(check("9+56sdwe"));
  14. System.out.println(check("^^^"));
  15. }
  16.  
  17. private static String check(String inputExpression)
  18. {
  19. if (Pattern.compile("\\p{L}").matcher(inputExpression).find()) {
  20. return "ErrorType.ALPHABETIC_SYMBOL";
  21. } else if (!Pattern.compile("[-+*/()0-9]").matcher(inputExpression).find()) {
  22. return "ErrorType.UNKNOWN_SYMBOL";
  23. }
  24. return "Valid";
  25. }
  26. }
Success #stdin #stdout 0.04s 4386816KB
stdin
Standard input is empty
stdout
Valid
ErrorType.ALPHABETIC_SYMBOL
ErrorType.UNKNOWN_SYMBOL