Programation

Bonjour,
j'ai implemente un programme java mais les erreurs suivantes s'affichent:

java.io.IOException: Could not connect to capture device
java.io.IOException: Could not connect to capture device
javax.media.NoPlayerException: Error instantiating class: com.sun.media.protocol.vfw.DataSource : java.io.IOException: Could not connect to capture device
at javax.media.Manager.createPlayerForContent(Manager.java:1362)
at javax.media.Manager.createPlayer(Manager.java:417)
at javax.media.Manager.createRealizedPlayer(Manager.java:553)
at mmwebcam.SwingCapture.<init>(SwingCapture.java:62)
at mmwebcam.ThreadTask.<init>(ThreadTask.java:19)
at mmwebcam.MMWebCam.<init>(MMWebCam.java:36)
at mmwebcam.MMWebCam.main(MMWebCam.java:44)
java.net.UnknownHostException: adresse_server
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at java.net.Socket.connect(Socket.java:469)
at java.net.Socket.<init>(Socket.java:366)
at java.net.Socket.<init>(Socket.java:179)
at mmwebcam.FtpConnection.connect(FtpConnection.java:126)
at mmwebcam.FtpConnection.connect(FtpConnection.java:117)
at mmwebcam.ThreadTask.<init>(ThreadTask.java:23)
at mmwebcam.MMWebCam.<init>(MMWebCam.java:36)
at mmwebcam.MMWebCam.main(MMWebCam.java:44)
upload de l'image
Exception in thread "Timer-0" java.lang.NullPointerException
at mmwebcam.SwingCapture.Capture(SwingCapture.java:101)
at mmwebcam.ThreadTask.run(ThreadTask.java:40)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)