| java.lang.Object
 java.net.DatagramPacket
| DatagramPacket | | final public class DatagramPacket (Code) | | This class models a datagram packet to be sent or received. The
DatagramPacket(byte[], int, InetAddress, int) constructor is used for packets
to be sent, while the DatagramPacket(byte[], int) constructor is used for
received packets.
See Also: DatagramSocket |
| Field Summary | |
| InetAddress | address
| | int | capacity
Size of internal buffer that is used to store received data. | | byte[] | data
| | int | length
Length of the data to be sent or size of data that was received via
DatagramSocket#receive() method call. | | int | offset
| | int | port
|
| Constructor Summary | |
| public | DatagramPacket(byte[] data, int length)
Constructs a new DatagramPacket suitable for receiving
datagram packets of length up to length. | | public | DatagramPacket(byte[] data, int offset, int length)
Constructs a new DatagramPacket suitable for receiving
datagram packets of length up to length, with an offset
into the buffer offset. | | public | DatagramPacket(byte[] data, int offset, int length, InetAddress host, int aPort)
Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. | | public | DatagramPacket(byte[] data, int length, InetAddress host, int port)
Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. | | public | DatagramPacket(byte[] data, int length, SocketAddress sockAddr)
Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. | | public | DatagramPacket(byte[] data, int offset, int length, SocketAddress sockAddr)
Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. |
| Method Summary | |
| public synchronized InetAddress | getAddress()
Answer the IP address of the machine that is the target or sender of this
datagram. | | public synchronized byte[] | getData()
Answer the data sent or received in this datagram. | | public synchronized int | getLength()
Answer the length of the data sent or received in this datagram. | | public synchronized int | getOffset()
Answer the offset of the data sent or received in this datagram buffer. | | public synchronized int | getPort()
Answer the port number of the target or sender machine of this datagram. | | public synchronized SocketAddress | getSocketAddress()
Answer the SocketAddress for this packet. | | public synchronized void | setAddress(InetAddress addr)
Set the IP address of the machine that is the target of this datagram. | | public synchronized void | setData(byte[] buf, int anOffset, int aLength)
Set the data buffer for this datagram. | | public synchronized void | setData(byte[] buf)
Set the data sent in this datagram. | | public synchronized void | setLength(int len)
Set the length of the data sent in this datagram. | | public synchronized void | setPort(int aPort)
Set the port number of the target machine of this datagram. | | public synchronized void | setSocketAddress(SocketAddress sockAddr)
Set the SocketAddress for this packet. |
| capacity | | int capacity(Code) | | Size of internal buffer that is used to store received data. Should be
greater or equal to "length" field.
|
| length | | int length(Code) | | Length of the data to be sent or size of data that was received via
DatagramSocket#receive() method call.
|
| DatagramPacket | | public DatagramPacket(byte[] data, int length)(Code) | | Constructs a new DatagramPacket suitable for receiving
datagram packets of length up to length.
Parameters:
data - byte array to store the read characters
Parameters:
length - length of the data buffer |
| DatagramPacket | | public DatagramPacket(byte[] data, int offset, int length)(Code) | | Constructs a new DatagramPacket suitable for receiving
datagram packets of length up to length, with an offset
into the buffer offset.
Parameters:
data - byte array to store the read characters
Parameters:
offset - the offset into the byte array
Parameters:
length - length of the data buffer |
| DatagramPacket | | public DatagramPacket(byte[] data, int offset, int length, InetAddress host, int aPort)(Code) | | Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. The length must be
less than or equal to the size of data.
Parameters:
data - byte array to store the read characters
Parameters:
offset - the offset in to read/write from
Parameters:
length - length of the data buffer
Parameters:
host - address of the target host
Parameters:
aPort - target host port |
| DatagramPacket | | public DatagramPacket(byte[] data, int length, InetAddress host, int port)(Code) | | Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. The length must be
less than or equal to the size of data.
Parameters:
data - byte array to store the read characters
Parameters:
length - length of the data buffer
Parameters:
host - address of the target host
Parameters:
port - target host port |
| DatagramPacket | | public DatagramPacket(byte[] data, int length, SocketAddress sockAddr) throws SocketException(Code) | | Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. The length must be
less than or equal to the size of data.
Parameters:
data - byte array to store the read characters
Parameters:
length - length of the data buffer
Parameters:
sockAddr - the machine address and port |
| DatagramPacket | | public DatagramPacket(byte[] data, int offset, int length, SocketAddress sockAddr) throws SocketException(Code) | | Constructs a new DatagramPacket suitable for sending
packets to the nominated host/port. The length must be
less than or equal to the size of data.
Parameters:
data - byte array to store the read characters
Parameters:
offset - the offset in to read/write from
Parameters:
length - length of the data buffer
Parameters:
sockAddr - the machine address and port |
| getAddress | | public synchronized InetAddress getAddress()(Code) | | Answer the IP address of the machine that is the target or sender of this
datagram.
InetAddress the target host address |
| getData | | public synchronized byte[] getData()(Code) | | Answer the data sent or received in this datagram.
byte[] the data sent/received |
| getLength | | public synchronized int getLength()(Code) | | Answer the length of the data sent or received in this datagram.
int the length of the sent/received data |
| getOffset | | public synchronized int getOffset()(Code) | | Answer the offset of the data sent or received in this datagram buffer.
int the offset of the start of the sent/received data |
| getPort | | public synchronized int getPort()(Code) | | Answer the port number of the target or sender machine of this datagram.
int for received packets, the sender address and for sentpackets, the target host |
| getSocketAddress | | public synchronized SocketAddress getSocketAddress()(Code) | | Answer the SocketAddress for this packet.
|
| setAddress | | public synchronized void setAddress(InetAddress addr)(Code) | | Set the IP address of the machine that is the target of this datagram.
Parameters:
addr - the target host address |
| setData | | public synchronized void setData(byte[] buf, int anOffset, int aLength)(Code) | | Set the data buffer for this datagram.
Parameters:
buf - the data to be sent
Parameters:
anOffset - the offset into the data
Parameters:
aLength - the length of the data to be sent |
| setData | | public synchronized void setData(byte[] buf)(Code) | | Set the data sent in this datagram.
Parameters:
buf - the data to be sent |
| setLength | | public synchronized void setLength(int len)(Code) | | Set the length of the data sent in this datagram.
Parameters:
len - the length of the data to be sent |
| setPort | | public synchronized void setPort(int aPort)(Code) | | Set the port number of the target machine of this datagram.
Parameters:
aPort - the target host port |
| setSocketAddress | | public synchronized void setSocketAddress(SocketAddress sockAddr)(Code) | | Set the SocketAddress for this packet.
Parameters:
sockAddr - the machine address and port |
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