| Package | Description | 
|---|---|
| java.net | Provides the classes for implementing networking applications. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BindExceptionSignals that an error occurred while attempting to bind a
 socket to a local address and port. | 
| class  | ConnectExceptionSignals that an error occurred while attempting to connect a
 socket to a remote address and port. | 
| class  | NoRouteToHostExceptionSignals that an error occurred while attempting to connect a
 socket to a remote address and port. | 
| class  | PortUnreachableExceptionSignals that an ICMP Port Unreachable message has been
 received on a connected datagram. | 
| Modifier and Type | Method and Description | 
|---|---|
| protected abstract void | DatagramSocketImpl. bind(int lport,
    InetAddress laddr)Binds a datagram socket to a local port and address. | 
| void | DatagramSocket. bind(SocketAddress addr)Binds this DatagramSocket to a specific address and port. | 
| protected void | DatagramSocketImpl. connect(InetAddress address,
       int port)Connects a datagram socket to a remote destination. | 
| void | DatagramSocket. connect(SocketAddress addr)Connects this socket to a remote socket address (IP address + port number). | 
| protected abstract void | DatagramSocketImpl. create()Creates a datagram socket. | 
| boolean | DatagramSocket. getBroadcast()Tests if SO_BROADCAST is enabled. | 
| static NetworkInterface | NetworkInterface. getByIndex(int index)Get a network interface given its index. | 
| static NetworkInterface | NetworkInterface. getByInetAddress(InetAddress addr)Convenience method to search for a network interface that
 has the specified Internet Protocol (IP) address bound to
 it. | 
| static NetworkInterface | NetworkInterface. getByName(String name)Searches for the network interface with the specified name. | 
| byte[] | NetworkInterface. getHardwareAddress()Returns the hardware address (usually MAC) of the interface if it
 has one and if it can be accessed given the current privileges. | 
| InetAddress | MulticastSocket. getInterface()Retrieve the address of the network interface used for
 multicast packets. | 
| boolean | Socket. getKeepAlive()Tests if  SO_KEEPALIVEis enabled. | 
| boolean | MulticastSocket. getLoopbackMode()Get the setting for local loopback of multicast datagrams. | 
| int | NetworkInterface. getMTU()Returns the Maximum Transmission Unit (MTU) of this interface. | 
| NetworkInterface | MulticastSocket. getNetworkInterface()Get the multicast network interface set. | 
| static Enumeration<NetworkInterface> | NetworkInterface. getNetworkInterfaces()Returns all the interfaces on this machine. | 
| boolean | Socket. getOOBInline()Tests if  SO_OOBINLINEis enabled. | 
| Object | SocketOptions. getOption(int optID)Fetch the value of an option. | 
| int | DatagramSocket. getReceiveBufferSize()Get value of the SO_RCVBUF option for this  DatagramSocket, that is the
 buffer size used by the platform for input on thisDatagramSocket. | 
| int | ServerSocket. getReceiveBufferSize()Gets the value of the  SO_RCVBUFoption
 for thisServerSocket, that is the proposed buffer size that
 will be used for Sockets accepted from thisServerSocket. | 
| int | Socket. getReceiveBufferSize()Gets the value of the  SO_RCVBUFoption
 for thisSocket, that is the buffer size used by the platform
 for input on thisSocket. | 
| boolean | DatagramSocket. getReuseAddress()Tests if SO_REUSEADDR is enabled. | 
| boolean | ServerSocket. getReuseAddress()Tests if  SO_REUSEADDRis enabled. | 
| boolean | Socket. getReuseAddress()Tests if  SO_REUSEADDRis enabled. | 
| int | DatagramSocket. getSendBufferSize()Get value of the SO_SNDBUF option for this  DatagramSocket, that is the
 buffer size used by the platform for output on thisDatagramSocket. | 
| int | Socket. getSendBufferSize()Get value of the  SO_SNDBUFoption
 for thisSocket, that is the buffer size used by the platform
 for output on thisSocket. | 
| int | Socket. getSoLinger()Returns setting for  SO_LINGER. | 
| int | DatagramSocket. getSoTimeout()Retrieve setting for SO_TIMEOUT. | 
| int | Socket. getSoTimeout()Returns setting for  SO_TIMEOUT. | 
| boolean | Socket. getTcpNoDelay()Tests if  TCP_NODELAYis enabled. | 
| int | DatagramSocket. getTrafficClass()Gets traffic class or type-of-service in the IP datagram
 header for packets sent from this DatagramSocket. | 
| int | Socket. getTrafficClass()Gets traffic class or type-of-service in the IP header
 for packets sent from this Socket | 
| boolean | NetworkInterface. isLoopback()Returns whether a network interface is a loopback interface. | 
| boolean | NetworkInterface. isPointToPoint()Returns whether a network interface is a point to point interface. | 
| boolean | NetworkInterface. isUp()Returns whether a network interface is up and running. | 
| void | DatagramSocket. setBroadcast(boolean on)Enable/disable SO_BROADCAST. | 
| void | MulticastSocket. setInterface(InetAddress inf)Set the multicast network interface used by methods
 whose behavior would be affected by the value of the
 network interface. | 
| void | Socket. setKeepAlive(boolean on)Enable/disable  SO_KEEPALIVE. | 
| void | MulticastSocket. setLoopbackMode(boolean disable)Disable/Enable local loopback of multicast datagrams
 The option is used by the platform's networking code as a hint
 for setting whether multicast data will be looped back to
 the local socket. | 
| void | MulticastSocket. setNetworkInterface(NetworkInterface netIf)Specify the network interface for outgoing multicast datagrams
 sent on this socket. | 
| void | Socket. setOOBInline(boolean on)Enable/disable  SO_OOBINLINE(receipt of TCP urgent data)
 By default, this option is disabled and TCP urgent data received on a
 socket is silently discarded. | 
| void | SocketOptions. setOption(int optID,
         Object value)Enable/disable the option specified by optID. | 
| void | DatagramSocket. setReceiveBufferSize(int size)Sets the SO_RCVBUF option to the specified value for this
  DatagramSocket. | 
| void | ServerSocket. setReceiveBufferSize(int size)Sets a default proposed value for the
  SO_RCVBUFoption for sockets
 accepted from thisServerSocket. | 
| void | Socket. setReceiveBufferSize(int size)Sets the  SO_RCVBUFoption to the
 specified value for thisSocket. | 
| void | DatagramSocket. setReuseAddress(boolean on)Enable/disable the SO_REUSEADDR socket option. | 
| void | ServerSocket. setReuseAddress(boolean on)Enable/disable the  SO_REUSEADDRsocket option. | 
| void | Socket. setReuseAddress(boolean on)Enable/disable the  SO_REUSEADDRsocket option. | 
| void | DatagramSocket. setSendBufferSize(int size)Sets the SO_SNDBUF option to the specified value for this
  DatagramSocket. | 
| void | Socket. setSendBufferSize(int size)Sets the  SO_SNDBUFoption to the
 specified value for thisSocket. | 
| void | Socket. setSoLinger(boolean on,
           int linger)Enable/disable  SO_LINGERwith the
 specified linger time in seconds. | 
| void | DatagramSocket. setSoTimeout(int timeout)Enable/disable SO_TIMEOUT with the specified timeout, in
  milliseconds. | 
| void | ServerSocket. setSoTimeout(int timeout)Enable/disable  SO_TIMEOUTwith the
 specified timeout, in milliseconds. | 
| void | Socket. setSoTimeout(int timeout)Enable/disable  SO_TIMEOUTwith the specified timeout, in milliseconds. | 
| void | Socket. setTcpNoDelay(boolean on)Enable/disable  TCP_NODELAY(disable/enable Nagle's algorithm). | 
| void | DatagramSocket. setTrafficClass(int tc)Sets traffic class or type-of-service octet in the IP
 datagram header for datagrams sent from this DatagramSocket. | 
| void | Socket. setTrafficClass(int tc)Sets traffic class or type-of-service octet in the IP
 header for packets sent from this Socket. | 
| boolean | NetworkInterface. supportsMulticast()Returns whether a network interface supports multicasting or not. | 
| Constructor and Description | 
|---|
| DatagramSocket()Constructs a datagram socket and binds it to any available port
 on the local host machine. | 
| DatagramSocket(int port)Constructs a datagram socket and binds it to the specified port
 on the local host machine. | 
| DatagramSocket(int port,
              InetAddress laddr)Creates a datagram socket, bound to the specified local
 address. | 
| DatagramSocket(SocketAddress bindaddr)Creates a datagram socket, bound to the specified local
 socket address. | 
| Socket(SocketImpl impl)Creates an unconnected Socket with a user-specified
 SocketImpl. | 
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