Stream in stream out

Question

can anyone give me a short example how to read a stream in(not from a file.. just a simple datastream from USB) and how to write a stream out from that..thx

Answer 1

ok.. i managed to detect the USBs.
http://www-106.ibm.com/developerworks/java/library/j-usb/
import usb.core.*;
public class ListUSB
public static void main(String[] args)
try
// Bootstrap by getting the USB Host from the HostFactory.
Host host = HostFactory.getHost();
// Obtain a list of the USB buses available on the Host.
Bus[] bus = host.getBusses();
int total_bus = bus.length;
// Traverse through all the USB buses.
for (int i=0; i<total_bus; i++)
// Access the root hub on the USB bus and obtain the
// number of USB ports available on the root hub.
Device root = bus.getRootHub();
int total_port = root.getNumPorts();
// Traverse through all the USB ports available on the
// root hub. It should be mentioned that the numbering
// starts from 1, not 0.
for (int j=1; j<=total_port; j++)
// Obtain the Device connected to the port.
Device device = root.getChild(j);
if (device != null)
// USB device available, do something here.
// Obtain the current Configuration of the device and the number of
// Interfaces available under the current Configuration.
Configuration config = device.getConfiguration();
int total_interface = config.getNumInterfaces();
// Traverse through the Interfaces
for (int k=0; k<total_interface; k++)
// Access the currently Interface and obtain the number of
// endpoints available on the Interface.
Interface itf = config.getInterface(k, 0);
int total_ep = itf.getNumEndpoints();
// Traverse through all the endpoints.
for (int l=0; l<total_ep; l++)
// Access the endpoint, and obtain its I/O type.
Endpoint ep = itf.getEndpoint(l);
String io_type = ep.getType();
boolean input = ep.isInput();
// If the endpoint is an input endpoint, obtain its
// InputStream and read in data.
if (input)
InputStream in;
in = ep.getInputStream(); <--------------------- here i have the problem... it simply returns "null"
// Read in data here
in.close();
// If the Endpoint is and output Endpoint, obtain its
// OutputStream and write out data.
else
OutputStream out;
out = ep.getOutputStream();
// Write out data here.
out.close();
} catch (Exception e)
System.out.println(e.getMessage());
look the code above.. it really works very well.. it detects that i have an input device on an USB(in fact i just have plugged my mouse there).
so here is my question: i want to put there a video cam who send data streams. so does
in = ep.getInputStream();
get the whole stream? or do i have to write there somewhere a while boucle to read it well...
and is
InputStream in;
appropriate for that?
(sorry at the moment i can't do any test with a cam because i dont have it here)