如果5秒后没有得到数据,关闭串口

以下是我在课堂上的方法:

    public void initialize() throws Exception {

    CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier(PORT_NAME);

    if (portId.isCurrentlyOwned()) {
        System.out.println("Error: Port is currently in use");
    } else {
            CommPort commPort = portId.open(this.getClass().getName(), TIME_OUT);

            serialPort = (SerialPort) commPort;
            serialPort.setSerialPortParams(DATA_RATE, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);

            input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));

            serialPort.addEventListener(this);
            serialPort.notifyOnDataAvailable(true);
    }
}

public synchronized void close() {
    if (serialPort != null) {
        serialPort.removeEventListener();
        serialPort.close();
    }
}

public synchronized void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
        try {
            input.ready();
            String data= input.readLine();
            System.out.println(data);
            close();
        } catch (Exception e) {
            System.err.println(e.toString());
        }
    }