Java String match single number in String

public class Main {

   public static void main(String[] args) {
      String str = "";

      // test to see if any numbers are present

      str = "Java 9";

      boolean result = str.matches("Java [0-9]");
      System.out.println(result);

   }/*from   w w w  .  jav  a 2s  . c o  m*/

}