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package com.company;
 
import jssc.SerialPort;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import jssc.SerialPortException;
 
import java.util.Arrays;
 
public class Main
{
    public static void main(String[] args)
    {
        final SerialPort serialPort = new SerialPort("/dev/ttyACM1");
 
        try
        {
            serialPort.openPort();
 
            serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
 
            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;
            serialPort.setEventsMask(mask);
 
            serialPort.addEventListener
            (
                new SerialPortEventListener()
                {
                    @Override
                    public void serialEvent(SerialPortEvent serialPortEvent)
                    {
                        if(serialPortEvent.isRXCHAR())
                        {
                            if(serialPortEvent.getEventValue() == 10)
                            {//Check bytes count in the input buffer
                                //Read data, if 10 bytes available
                                try
                                {
                                    byte buffer[] = serialPort.readBytes(10);
                                    System.out.println("DATA: " + Arrays.toString(buffer));
                                }
                                catch(SerialPortException ex)
                                {
                                    ex.printStackTrace();
                                }
                            }
                        }
                        else if(serialPortEvent.isCTS())
                        {//If CTS line has changed state
                            if(serialPortEvent.getEventValue() == 1)
                            {//If line is ON
                                System.out.println("CTS - ON");
                            }
                            else
                            {
                                System.out.println("CTS - OFF");
                            }
                        }
                        else if(serialPortEvent.isDSR())
                        {///If DSR line has changed state
                            if(serialPortEvent.getEventValue() == 1)
                            {//If line is ON
                                System.out.println("DSR - ON");
                            }
                            else
                            {
                                System.out.println("DSR - OFF");
                            }
                        }
                        else
                        {
                            System.out.println("to w ogole mozliwe?");
                        }
                    }
                }
            );
        }
        catch(SerialPortException ex)
        {
            ex.printStackTrace();
        }
        finally
        {
            try
            {
                serialPort.closePort();
            }
            catch(SerialPortException e)
            {
                e.printStackTrace();
            }
        }
    }
}

Main.java:3: error: package jssc does not exist
import jssc.SerialPort;
           ^
Main.java:4: error: package jssc does not exist
import jssc.SerialPortEvent;
           ^
Main.java:5: error: package jssc does not exist
import jssc.SerialPortEventListener;
           ^
Main.java:6: error: package jssc does not exist
import jssc.SerialPortException;
           ^
Main.java:14: error: cannot find symbol
        final SerialPort serialPort = new SerialPort("/dev/ttyACM1");
              ^
  symbol:   class SerialPort
  location: class Main
Main.java:14: error: cannot find symbol
        final SerialPort serialPort = new SerialPort("/dev/ttyACM1");
                                          ^
  symbol:   class SerialPort
  location: class Main
Main.java:20: error: cannot find symbol
            serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
                                 ^
  symbol:   variable SerialPort
  location: class Main
Main.java:20: error: cannot find symbol
            serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
                                                           ^
  symbol:   variable SerialPort
  location: class Main
Main.java:20: error: cannot find symbol
            serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
                                                                                  ^
  symbol:   variable SerialPort
  location: class Main
Main.java:20: error: cannot find symbol
            serialPort.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
                                                                                                         ^
  symbol:   variable SerialPort
  location: class Main
Main.java:22: error: cannot find symbol
            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;
                       ^
  symbol:   variable SerialPort
  location: class Main
Main.java:22: error: cannot find symbol
            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;
                                                ^
  symbol:   variable SerialPort
  location: class Main
Main.java:22: error: cannot find symbol
            int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;
                                                                      ^
  symbol:   variable SerialPort
  location: class Main
Main.java:27: error: cannot find symbol
                new SerialPortEventListener()
                    ^
  symbol:   class SerialPortEventListener
  location: class Main
Main.java:78: error: cannot find symbol
        catch(SerialPortException ex)
              ^
  symbol:   class SerialPortException
  location: class Main
Main.java:88: error: cannot find symbol
            catch(SerialPortException e)
                  ^
  symbol:   class SerialPortException
  location: class Main
16 errors

Standard output is empty