The use of java.net is very useful for applications interspersed with IO streams.

Import java. Io .*;
Import java. Lang .*;
Import java.net .*;
Public class uclient
{
Private datagramsocket CLI;
Private datagrampacket PAC;
Private byte Sb [];
Private string SEN;
Public uclient ()
{
Init ();
}
Public void Init ()
{
Try
{
// Specify the port number to avoid conflict with other applications
CLI = new datagramsocket (10002 );
SB = new byte [1024];
Sen = "send data in UDP mode ";
SB = Sen. getbytes ();
PAC = new datagrampacket (SB, SB. length, inetaddress. getbyname ("localhost"), 10005 );
CLI. Send (PAC );
}
Catch (socketexception SE)
{
Se. printstacktrace ();
}
Catch (ioexception IE)
{
Ie. printstacktrace ();
}
}
Public static void main (string ARGs [])
{
New uclient ();
}
}
Receiver data:
// Improve the Code to change the Receiving Method
Import java. Io .*;
Import java. Lang .*;
Import java.net .*;
Public class userve
{
Private datagramsocket SER;
Private datagrampacket PAC;
Private byte RB [];
Private string Rev;
Public userve ()
{
Init ();
}
Public void Init ()
{
Try
{
SER = new datagramsocket (10005 );
RB = new byte [1024];
PAC = new datagrampacket (RB, RB. Length );
REV = "";
Int I = 0;
While (I = 0) // loop if no data exists
{
Ser. Receive (PAC );
I = Pac. getlength ();
// Receive data
If (I> 0)
{
// Specify the length of the received data, so that the received data can be displayed normally. This can be easily ignored at the beginning.
REV = new string (RB, 0, Pac. getlength ());
System. Out. println (REV );
I = 0; // receive cyclically
}
}
}
Catch (exception E)
{
E. printstacktrace ();
}
}
Public static void main (string ARGs [])
{
New userve ();
}
}