Use a custom format : Message Format « I18N « Java Tutorial

1. Java Tutorial
2. I18N
3. Message Format

import java.text.MessageFormat;

public class Main {
  public static void main(String[] argv) throws Exception {
    Object[] params = new Object[] { new Integer(123), new Integer(1234) };
    String msg = MessageFormat.format("{0,number,#} a''s and {1,number,#} b''s", params);
    System.out.println(msg);
  }
}