DatagramPacket JDK 1.6)

Constructors

public DatagramPacket (byte[] buf, int length)

Constructs a DatagramPacket for receiving packets of length length.

The length argument must be less than or equal to buf.length.
Parameters:
- buf - buffer for holding the incoming datagram.
- length - the number of bytes to read.

public DatagramPacket (byte[] buf, int length, InetAddress address, int port)

Constructs a datagram packet for sending packets of length length to the specified port number on the specified host.

Constructs a datagram packet for sending packets of length
length to the specified port number on the specified
host. The length argument must be less than or equal
to buf.length.
Parameters:
- buf - the packet data.
- length - the packet length.
- address - the destination address.
- port - the destination port number.
See Also: InetAddress,

public DatagramPacket (byte[] buf, int offset, int length)

Constructs a DatagramPacket for receiving packets of length length, specifying an offset into the buffer.

The length argument must be less than or equal to buf.length.
Parameters:
- buf - buffer for holding the incoming datagram.
- offset - the offset for the buffer
- length - the number of bytes to read.
Since: 1.2

public DatagramPacket (byte[] buf, int offset, int length, InetAddress address, int port)

Constructs a datagram packet for sending packets of length length with offset ioffsetto the specified port number on the specified host.

Constructs a datagram packet for sending packets of length
length with offset ioffsetto the
specified port number on the specified host. The
length argument must be less than or equal to
buf.length.
Parameters:
- buf - the packet data.
- offset - the packet data offset.
- length - the packet data length.
- address - the destination address.
- port - the destination port number.
Since: 1.2
See Also: InetAddress,

public DatagramPacket (byte[] buf, int offset, int length, SocketAddress address) throws SocketException

Constructs a datagram packet for sending packets of length length with offset ioffsetto the specified port number on the specified host.

Constructs a datagram packet for sending packets of length
length with offset ioffsetto the
specified port number on the specified host. The
length argument must be less than or equal to
buf.length.
Parameters:
- buf - the packet data.
- offset - the packet data offset.
- length - the packet data length.
- address - the destination socket address.
Throws:
- IllegalArgumentException - if address type is not supported
Since: 1.4
See Also: InetAddress,

public DatagramPacket (byte[] buf, int length, SocketAddress address) throws SocketException

Constructs a datagram packet for sending packets of length length to the specified port number on the specified host.

Constructs a datagram packet for sending packets of length
length to the specified port number on the specified
host. The length argument must be less than or equal
to buf.length.
Parameters:
- buf - the packet data.
- length - the packet length.
- address - the destination address.
Throws:
- IllegalArgumentException - if address type is not supported
Since: 1.4
See Also: InetAddress,

Methods

Hide/Show inherited methods

publicsynchronized InetAddress getAddress ()

Returns the IP address of the machine to which this datagram is being sent or from which the datagram was received.

publicsynchronized byte getData ()

Returns the data buffer.

Returns the data buffer. The data received or the data to be sent
starts from the offset in the buffer,
and runs for length long.
Returns: the buffer used to receive or send data
See Also: DatagramPacket.setData(byte[], int, int),

publicsynchronized int getLength ()

Returns the length of the data to be sent or the length of the data received.

publicsynchronized int getOffset ()

Returns the offset of the data to be sent or the offset of the data received.

publicsynchronized int getPort ()

Returns the port number on the remote host to which this datagram is being sent or from which the datagram was received.

publicsynchronized SocketAddress getSocketAddress ()

Gets the SocketAddress (usually IP address + port number) of the remote host that this packet is being sent to or is coming from.

Gets the SocketAddress (usually IP address + port number) of the remote
host that this packet is being sent to or is coming from.
Returns: the SocketAddress
Since: 1.4
See Also: DatagramPacket.setSocketAddress(java.net.SocketAddress),

publicsynchronized void setAddress (InetAddress iaddr)

Sets the IP address of the machine to which this datagram is being sent.

Sets the IP address of the machine to which this datagram
is being sent.
Parameters:
- iaddr - the InetAddress
Since: JDK1.1
See Also: DatagramPacket.getAddress(),

publicsynchronized void setData (byte[] buf)

Set the data buffer for this packet.

Set the data buffer for this packet. With the offset of
this DatagramPacket set to 0, and the length set to
the length of buf.
Parameters:
- buf - the buffer to set for this packet.
Throws:
- NullPointerException - if the argument is null.
Since: JDK1.1
See Also: DatagramPacket.getLength(), DatagramPacket.getData(),

publicsynchronized void setData (byte[] buf, int offset, int length)

Set the data buffer for this packet.

publicsynchronized void setLength (int length)

Set the length for this packet.

publicsynchronized void setPort (int iport)

Sets the port number on the remote host to which this datagram is being sent.

publicsynchronized void setSocketAddress (SocketAddress address)

Sets the SocketAddress (usually IP address + port number) of the remote host to which this datagram is being sent.

Sets the SocketAddress (usually IP address + port number) of the remote
host to which this datagram is being sent.
Parameters:
- address - the SocketAddress
Throws:
- IllegalArgumentException - if address is null or is a SocketAddress subclass not supported by this socket
Since: 1.4
See Also: DatagramPacket.getSocketAddress(),