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public  final  class  java.net.DatagramPacket
    extends  java.lang.Object  (I-§1.12)
{
        // Constructors
    public DatagramPacket(byte  ibuf[], int  ilength);	§4.2.1
    public DatagramPacket(byte  ibuf[], int  ilength,	§4.2.2
                              InetAddress  iaddr, int iport);

        // Methods
    public InetAddress getAddress();	§4.2.3
    public byte[] getData();	§4.2.4
    public int getLength();	§4.2.5
    public int getPort();	§4.2.6
}

Datagram packets are used to implement a connectionless packet delivery service. Each message is routed from one machine to another based solely on information contained within that packet. Multiple packets sent from a machine to another might be routed differently, and might arrive in any order.

Constructs a DatagramPacket for receiving packets of length ilength.

The length argument must be less than or equal to ibuf.length

Parameters:

ibuf - buffer for holding the incoming datagram

ilength - the number of bytes to read

Constructs a DatagramPacket for sending packets of length ilength to the specified port number on the specified host.

The length argument must be less than or equal to ibuf.length

Parameters:

ibuf - the packet data

ilength - the packet length

iaddr - the desination address(§4.4)

iport - the destination port number

Returns:

the IP address (§4.4) of the machine to which this datagram is being sent, or from which the datagram was received.

Returns:

the data received, or the data to be sent.

Returns:

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

Returns:

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

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