Java รบกวนสอบถามเกี่ยวกับการเชื่อมต่อปริ้นเตอร์หน่อยครับ

PrintService printService = PrintServiceLookup.lookupDefaultPrintService();
AttributeSet attributes = printService.getAttributes();
String printerState = attributes.get(PrinterState.class).toString();
String printerStateReason = attributes.get(PrinterStateReason.class).toString();

System.out.println("printerState = " + printerState); // May be IDLE, PROCESSING, STOPPED or UNKNOWN
System.out.println("printerStateReason = " + printerStateReason); // If your printer state returns STOPPED, for example, you can identify the reason 

if (printerState.equals(PrinterState.STOPPED.toString()) {

    if (printerStateReason.equals(PrinterStateReason.TONER_LOW.toString()) {

        System.out.println("Toner level is low.");
    }
}