when i try to call this method "setReuseAddress(true)":

i get the following error:

java.net.SocketException: bad argument for SO_REUSEADDR
java.net.SocketException: bad argument for SO_REUSEADDR
        at java.net.PlainDatagramSocketImpl.setOption(PlainDatagramSocketImpl.java:189)
        at java.net.DatagramSocket.setReuseAddress(DatagramSocket.java:777)
        at udpServer.<init>(udpServer.java:102)
        at udpServer.main(udpServer.java:59)