java - try catch numeric inputs -

i'm having bit of trouble trying figure out how prevent user input numerical. understand how prevent non-numerical inputs (ie. inputting letter instead of number) not other way around. how work around this?

string[] player_name = new string[game];         (i = 0; < game; i++) {      try {         player_name[i] = joptionpane.showinputdialog("enter name of  player, 1 one. ");      } catch(exception e) {         joptionpane.showmessagedialog(null, "enter valid name!");         i--;      } 

use do/while statement. "do input while input contains @ last 1 number".

string[] player_name = new string[game];       (int = 0; < game; i++) {      string input;      {                        input = joptionpane.showinputdialog("enter name of          player, 1 one. ");                   } while (input.matches(".*\\d+.*"));        player_name[i] = input;  }