The serial read and write package download address under Linux:
http://to.agreatserver.com/rxtx21.zip
The Win32 platform can be downloaded from the Sun's website.
Below is an example
//Serialtest.java
// by aico
// 2004-05-11
Import java.io. *;
Import java.util. *;
Import gnu.io. *;
Public Class Serialtest
{
Public static void main (string [] args)
{
String commname = "com1"; // for Win32
// String Commname = "/ dev / ttys0"; // for Linux
SerialTest ST = New SerialTest ();
SerialPort Port = St.getSerialPort (Commname);
IF (port! = NULL)
{
St.writeString (Port, "Hi, Serial Test.");
Port.close ();
}
}
Public SerialPort GetSerialPort (String Commname)
{
IF (COMMNAME == NULL)
Return NULL;
Enumeration portlist = commportidentifier.getportidentifiers ();
While (portlist.hasmorelements ())
{
CommPortidentifier portid = (CommPortIndIfier) PortList.nexTelement ();
IF ((Portid.getPortType () == Commportidentifier.port_serial) && portid.getname (). EqualsignoreCase (Commname))
{
SerialPort Port = NULL;
Try
{
Port = (SerialPort) Portid.open ("Test", 2000);
} catch (portinuseexception e)
{
E.PrintStackTrace ();
}
Return port;
}
}
Return NULL;
}
Public void Writestring (SerialPort Port, String Message)
{
IF (port == null | | message == null)
Return;
OutputStream out = null;
Try
{
OUT = port.getOutputStream ();
} Catch (ioException e)
{
E.PrintStackTrace ();
Return;
}
Try
{
Port.setserialportParams (9600, SerialPort.Database_8, serialport.stopbits_1, serialport.parity_none);
} Catch (unsupportedcommoperationexception e)
{
E.PrintStackTrace ();
Return;
}
Try
{
Out.write (Message.GetBytes ());
} Catch (ioexception e) {
E.PrintStackTrace ();
Return;
}
}
}
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Maybe help you:
http://www-900.ibm.com/developerWorks/cn/java/joy-comm/index.shtml
