Error in the SOAP Client code for documentation of Jax-WS

Documentation of JBoss EAP 7.2.0.

Developing Web Services Applications

Chapter 3.1.2 - Client-side Development Strategies

The Client code is

import echo.*;

public class EchoClient {

public static void main(String args[]) {

if (args.length != 1)

{ System.err.println("usage: EchoClient <message>"); System.exit(1); }

EchoService service = new EchoService();
Echo echo = service.getEchoPort();
System.out.println("Server said: " + echo.echo(args0));
}
}

This code does not gets compiled because of "args0" in the System.out.println. as it is missing square brackets.
It must be
System.out.println("Server said: " + echo.echo(args[0]));