clean.java

import com.fazecast.jSerialComm.SerialPort;

public class clean {

    public static void main(String[] args) {
        SerialPort[] ttyPort = SerialPort.getCommPorts();

        for (SerialPort i: ttyPort) {
            i.openPort();
            System.out.println(i.bytesAvailable());
            i.closePort();
        }

    }
}