Java readLine from Com port

Question

is any way to change this java code (read from com port) to read lines ?
eg.

I'm using rxtx com

original method:

public void serialEvent(SerialPortEvent event) {
    switch (event.getEventType()) {
        case SerialPortEvent.DATA_AVAILABLE:
            byte[] readBuffer = new byte[10];
            int numBytes = 0;
            try {
                while (inputStream.available() > 0) {                       
                    numBytes = inputStream.read(readBuffer);
                }
            } catch (IOException e) {
                System.out.println(e);
            }
        System.out.println(Arrays.toString(readBuffer));
    }
}

You could use a buffered inputstream which wraps a reader which can wrap your inputstream ... like BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8")); (Where "is" is your inputstream. Read up on Java IO — ErstwhileIII
– ErstwhileIII, Commented Aug 12, 2014 at 17:07

Elliott Frisch · Accepted Answer · 2014-08-12 17:13:01Z

Assuming inputStream is an InputStream, you could wrap it with an InputStreamReader and wrap that with a BufferedReader (that has a readLine()). Something like,

case SerialPortEvent.DATA_AVAILABLE:
  String line;
  BufferedReader br = null;
  try {
    br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
    while ((line = br.readLine()) != null) {
      System.out.println(line);
    }
  } catch (IOException e) {
    e.printStackTrace();
  } finally {
    try {
      br.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

or you could possible use with try-with-resouces,

case SerialPortEvent.DATA_AVAILABLE:
  String line;
  BufferedReader br = null;
  try (br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));) {
    while ((line = br.readLine()) != null) {
      System.out.println(line);
    }
  } catch (IOException e) {
    e.printStackTrace();
  }

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