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

        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) {


      }

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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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            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) {


      }

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                // 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 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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