import java.text.MessageFormat;
public class Main {
public static void main(String[] argv) throws Exception {
Object[] params = new Object[] { new Double(123.45), new Double(1234.56) };
String msg = MessageFormat.format("{0,number,#.#} a''s and {1,number,#.#} b''s", params);
System.out.println(msg);
}
}