Examples of java.net.DatagramSocket.bind()

java.net.DatagramSocket.bind()
Binds this DatagramSocket to a specific address & port.
If the address is null, then the system will pick up an ephemeral port and a valid local address to bind the socket.
@param addr The address & port to bind to. @throws SocketException if any error happens during the bind, or if thesocket is already bound. @throws SecurityException if a security manager exists and its checkListen method doesn't allow the operation. @throws IllegalArgumentException if addr is a SocketAddress subclassnot supported by this socket. @since 1.4

        // now make sure that datagrams sent from this socket appear to come
        // from the address we bound to
        InetAddress localHost = InetAddress.getLocalHost();
        portNumber = ports[2];
        DatagramSocket ds = new DatagramSocket(null);
        ds.bind(new InetSocketAddress(localHost, portNumber));


        server = new DatagramServer(serverPortNumber, localHost);
        server.start();
        Thread.sleep(1000);

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        DatagramSocket theSocket2 = new DatagramSocket(ports[0]);
        try {
            InetSocketAddress theAddress = new InetSocketAddress(InetAddress
                    .getLocalHost(), ports[1]);
            theSocket.bind(theAddress);
            theSocket2.bind(theAddress);
            fail("No exception binding to address that is not available");
        } catch (SocketException ex) {
        }
        theSocket.close();
        theSocket2.close();

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        InetSocketAddress theLocalAddress = new InetSocketAddress(InetAddress
                .getLocalHost(), ports[2]);
        theSocket = new DatagramSocket(null);
        assertFalse("Socket indicated bound when it should not be (2)",
                theSocket.isBound());
        theSocket.bind(theLocalAddress);
        assertTrue("Socket indicated not bound when it should be (4)",
                theSocket.isBound());
        theSocket.close();
        assertTrue("Socket indicated not bound when it should be (5)",
                theSocket.isBound());

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        // now create one that is not connected and validate that we get the
        // right answer
        DatagramSocket theSocket = new DatagramSocket(null);
        portNumber = ports[2];
        theSocket.bind(new InetSocketAddress(InetAddress.getLocalHost(),
                portNumber));
        assertNull("Returned incorrect InetSocketAddress -unconnected socket:"
                + "Expected: NULL", theSocket.getRemoteSocketAddress());


        // now connect and validate we get the right answer

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                "Returned incorrect InetSocketAddress -unbound socket- Expected null",
                theSocket.getLocalSocketAddress());


        // now bind the socket and make sure we get the right answer
        portNumber = Support_PortManager.getNextPortForUDP();
        theSocket.bind(new InetSocketAddress(InetAddress.getLocalHost(),
                portNumber));
        assertTrue(
                "Returned incorrect InetSocketAddress(2):"
                        + theSocket.getLocalSocketAddress().toString()
                        + "Expected: "

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                theSocket1 = new DatagramSocket(null);
                theSocket2 = new DatagramSocket(null);
                theSocket1.setReuseAddress(false);
                theSocket2.setReuseAddress(false);
                theSocket1.bind(theAddress);
                theSocket2.bind(theAddress);
                fail("No exception when trying to connect to do duplicate socket bind with re-useaddr set to false");
            } catch (BindException e) {


            }
            if (theSocket1 != null)

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            theSocket1 = new DatagramSocket(null);
            theSocket2 = new DatagramSocket(null);
            theSocket1.setReuseAddress(true);
            theSocket2.setReuseAddress(true);
            theSocket1.bind(theAddress);
            theSocket2.bind(theAddress);


            if (theSocket1 != null)
                theSocket1.close();
            if (theSocket2 != null)
                theSocket2.close();

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                theAddress = new InetSocketAddress(InetAddress.getLocalHost(),
                        Support_PortManager.getNextPortForUDP());
                theSocket1 = new DatagramSocket(null);
                theSocket2 = new DatagramSocket(null);
                theSocket1.bind(theAddress);
                theSocket2.bind(theAddress);
                fail("No exception when trying to connect to do duplicate socket bind with re-useaddr left as default");
            } catch (BindException e) {


            }
            if (theSocket1 != null)

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                // now create one that is not connected and validate that we get the
                // right answer
                DatagramSocket theSocket = new DatagramSocket(null);
                portNumber = ports[2];
                theSocket.bind(new InetSocketAddress(InetAddress.getLocalHost(),
                                portNumber));
                assertNull(
                                "Returned incorrect InetSocketAddress -unconnected socket:"
                                                + "Expected: NULL", theSocket
                                                .getRemoteSocketAddress());

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                                "Returned incorrect InetSocketAddress -unbound socket- Expected null",
                                theSocket.getLocalSocketAddress());


                // now bind the socket and make sure we get the right answer
                portNumber = Support_PortManager.getNextPortForUDP();
                theSocket.bind(new InetSocketAddress(InetAddress.getLocalHost(),
                                portNumber));
                assertTrue("Returned incorrect InetSocketAddress(2):"
                                + theSocket.getLocalSocketAddress().toString()
                                + "Expected: "
                                + (new InetSocketAddress(InetAddress.getLocalHost(),

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