import java.util.*;
import java.util.regex.*;
class ExceptionExample{

      public static void main(String[] args) throws Exception{
      boolean check=false;
      Scanner input=new Scanner(System.in);
      System.out.print("Enter string: ");
      String str=input.nextLine();
      Matcher m = Pattern.compile("[^\\s^\\w]").matcher(str);
      while(m.find()){
          check = true;
      }
      if(check==true){
      throw new Exception("InvalidCharacterFoundException!");
      }
      else{
      System.out.println("There is no invalid character in the string.");
    }
  }
}