DatagramPacket

DatagramPacket

java.net

---

Java 1.0

This class implements a packet of data that may be sent or received over the network through a DatagramSocket . Create a DatagramPacket to be sent over the network with one of the consructor methods that includes a network address. Create a DatagramPacket into which data can be received using one of the constructors that does not include a network address argument. The receive( ) method of DatagramSocket waits for data and stores it in a DatagramPacket created in this way. The contents and sender of a received packet can be queried with the DatagramPacket instance methods.

New constructors and methods were added to this class in Java 1.4 to support the SocketAddress abstraction of a network address.

 public final class  DatagramPacket  {  // Public Constructors  public  DatagramPacket  (byte[ ]  buf  , int  length  );  1.4  public  DatagramPacket  (byte[ ]  buf  , int  length  , SocketAddress  address  )  throws SocketException;  1.2  public  DatagramPacket  (byte[ ]  buf  , int  offset  , int  length  );        public  DatagramPacket  (byte[ ]  buf  , int  length  , InetAddress  address  ,       int  port  );  1.4  public  DatagramPacket  (byte[ ]  buf  , int  offset  , int  length  ,  SocketAddress  address  ) throws SocketException;  1.2  public  DatagramPacket  (byte[ ]  buf  , int  offset  , int  length  ,  InetAddress  address  , int  port  );  // Public Instance Methods  public InetAddress  getAddress  ( );  synchronized  public byte[ ]  getData  ( );  synchronized  public int  getLength  ( );  synchronized   1.2  public int  getOffset  ( );  synchronized  public int  getPort  ( );  synchronized   1.4  public SocketAddress  getSocketAddress  ( );  synchronized   1.1  public void  setAddress  (InetAddress  iaddr  );  synchronized   1.1  public void  setData  (byte[ ]  buf  );  synchronized   1.2  public void  setData  (byte[ ]  buf  , int  offset  , int  length  );  synchronized   1.1  public void  setLength  (int  length  );  synchronized   1.1  public void  setPort  (int  iport  );  synchronized   1.4  public void  setSocketAddress  (SocketAddress  address  );  synchronized  } 

Passed To

DatagramSocket.{receive( ) , send( )} , DatagramSocketImpl.{peekData( ) , receive( ) , send( )} , MulticastSocket.send( )