Java usage() method : <p>Hi Stackoverflow community</p>

<p>I have been trying to find a resource or reference that explains what the usage() method does. Unfortunately the word 'usage' is indexed so often in different contexts that I simply can't find a good resource. Would anybody be able to point me in the right direction?</p>

<pre><code>public static void main(String[] args) {
        if (args.length == 0) {
            usage(); 
        } else if ("parse".equals(args[0])) {
            final String[] parseArgs = new String[args.length - 1];
             etc ....
</code></pre>

<p>I know that in C getusage() is used to get memory and CPU usage statistics. Is this the same case in Java? Any pointers would be highly appreciated. 
Mike</p>
