Java by API/javax.comm/CommPort

CommPort: getInputStream()

/*
 * @(#)SimpleRead.java  1.12 98/06/25 SMI
 *
 * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license 
 * to use, modify and redistribute this software in source and binary
 * code form, provided that i) this copyright notice and license appear
 * on all copies of the software; and ii) Licensee does not utilize the
 * software in a manner which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind.
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
 * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE
 * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS
 * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING
 * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control
 * of aircraft, air traffic, aircraft navigation or aircraft
 * communications; or in the design, construction, operation or
 * maintenance of any nuclear facility. Licensee represents and
 * warrants that it will not use or redistribute the Software for such
 * purposes.
 */
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import javax.rum.rumPortIdentifier;
import javax.rum.PortInUseException;
import javax.rum.SerialPort;
import javax.rum.SerialPortEvent;
import javax.rum.SerialPortEventListener;
import javax.rum.UnsupportedCommOperationException;
public class MainClass implements Runnable, SerialPortEventListener {
  static CommPortIdentifier portId;
  static Enumeration portList;
  InputStream inputStream;
  SerialPort serialPort;
  Thread readThread;
  public static void main(String[] args) {
    portList = CommPortIdentifier.getPortIdentifiers();
    while (portList.hasMoreElements()) {
      portId = (CommPortIdentifier) portList.nextElement();
      if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
        // if (portId.getName().equals("COM1")) {
        if (portId.getName().equals("/dev/term/a")) {
          MainClass reader = new MainClass();
        }
      }
    }
  }
  public MainClass() {
    try {
      serialPort = (SerialPort) portId.open("MainClassApp", 2000);
    } catch (PortInUseException e) {
    }
    try {
      inputStream = serialPort.getInputStream();
    } catch (IOException e) {
    }
    try {
      serialPort.addEventListener(this);
    } catch (TooManyListenersException e) {
    }
    serialPort.notifyOnDataAvailable(true);
    try {
      serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
          SerialPort.PARITY_NONE);
    } catch (UnsupportedCommOperationException e) {
    }
    readThread = new Thread(this);
    readThread.start();
  }
  public void run() {
    try {
      Thread.sleep(20000);
    } catch (InterruptedException e) {
    }
  }
  public void serialEvent(SerialPortEvent event) {
    switch (event.getEventType()) {
    case SerialPortEvent.BI:
    case SerialPortEvent.OE:
    case SerialPortEvent.FE:
    case SerialPortEvent.PE:
    case SerialPortEvent.CD:
    case SerialPortEvent.CTS:
    case SerialPortEvent.DSR:
    case SerialPortEvent.RI:
    case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
      break;
    case SerialPortEvent.DATA_AVAILABLE:
      byte[] readBuffer = new byte[20];
      try {
        while (inputStream.available() > 0) {
          int numBytes = inputStream.read(readBuffer);
        }
        System.out.print(new String(readBuffer));
      } catch (IOException e) {
      }
      break;
    }
  }
}