The capabilities of a print service are called print service attributes. Examples of print service attributes include: color-supported, printer-name, and queued-job-count. This example demonstrates how to retrieve the current attributes of a print service. To monitor changes to these attributes, see e713 Listening for Print Service Status Changes. 
    Attribute[] attrs = service.getAttributes().toArray();
    for (int j=0; j<attrs.length; j++) {
        String attrName = attrs[j].getName();
    
        // Retrieve the string version of the attribute value
        String attrValue = attrs[j].toString();
    
        process(service, attrName, attrValue);
    }