import javax.swing.JOptionPane;

public class phonenumberconverter
{
   public static void main(String[] args)
   {
      String input, output = "";
      char c;
      int ctr;

      input = JOptionPane.showInputDialog("Enter a ten character alphanumeric phone number as such: XXX-XXX-XXXX");

      for (ctr = 0; ctr < 12; ctr++)
      {
         c = input.charAt(ctr);

         if(Character.isLowerCase(c))
         {
            c =  Character.toUpperCase(c);
         }

         switch(c)
         {
            case '-':                                         output+="-"; break;
            case '9':                                         output+="9"; break;
            case '1':                                         output+="1"; break;
            case '2': case 'A': case 'B': case 'C':           output+="2"; break;
            case '3': case 'D': case 'E': case 'F':           output+="3"; break;
            case '4': case 'G': case 'H': case 'I':           output+="4"; break;
            case '5': case 'J': case 'K': case 'L':           output+="5"; break;
            case '6': case 'M': case 'N': case 'O':           output+="6"; break;
            case '7': case 'P': case 'Q': case 'R': case 'S': output+="7"; break;
            case '8': case 'T': case 'U': case 'V':           output+="8"; break;
            case '0': case 'W': case 'X': case 'Y': case 'Z': output+="0"; break;
         }

         //ctr++;
      }

      JOptionPane.showMessageDialog(null, output);
   }
}