rxtx

I'm trying to write a java application that accesses the usb ports to read from and write to a device connected through usb. The problem I face is that I don't know what exactly to use in java to do such a thing. I searched online and found something called JUSB but all the posts seem fairly old. Currently I'm using the RXTX libraries but I sometimes run into some sync error. When I use C# to do the equivalent it requires far less code and I don't face any of the same sync error. My question is, is there anything built into the latest version of the JRE I can use to access the usb ports ( that

I am trying to use the 64 bit rxtx serial communication library (downloaded from cloudhopper) with 64bit windows 7 and eclipse. I get the message: java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path . The dlls are in the /jre/lib dir as well as the Windows/System32 . The RXTXcomm.jar is in the build path for eclipse as well as in the jre/lib/ext dir. I ran process monitor in the background and and see that RXTXcomm.jar , rxtxSerial.dll , and rxtxParallel.dll are all found and have been opened, So I am unclear as to why this problem is occurring. Any suggestions. Go to Project ->

According to the java api, the InputStream.read() is described as: If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown. I have a while(true) loop doing a read and I always get -1 when nothing's sent over the stream. That's expected. My question is when would read() ever block? Since if it doesn't get any data it returns -1. I would expect a blocking read to wait until data is received. If you've reached the end of the input stream, shouldn