构造子索引

DatagramSocketImpl()

方法索引

bind(int, InetAddress)
close()
create()
getFileDescriptor()
getLocalPort()
getTTL()
join(InetAddress)
leave(InetAddress)
peek(InetAddress)
receive(DatagramPacket)
send(DatagramPacket)
setTTL(byte)

域索引

fd
localPort