java tutorial - DatagramSocket | java DatagramSocket | DatagramPacket - java programming - learn java - java basics - java for beginners
- Java DatagramSocket and DatagramPacket is a connection-less socket programming model.
Java DatagramSocket
- DatagramSocket is used to send and receive datagram packets.
- It creates a datagram socket and binds up with the existing Port Number on the localhost machine.
Learn Java - Java tutorial - Java DatagramSocket - Java examples - Java programs
Constructors of DatagramSocket class
- DatagramSocket() throws SocketEeption: it creates a datagram socket and binds up the given Port Number.
- DatagramSocket(int port) throws SocketEeption: it creates a datagram socket and binds up with the specified port number and host address.
- DatagramSocket(int port, InetAddress address) throws SocketEeption: it creates a datagram socket and binds it with the specified port number and host address.
Java DatagramPacket
- Java DatagramPacket is a message that can be sent or received. If you send multiple packet, it may arrive in any order. But packet delivery is not guaranteed.
Learn Java - Java tutorial - Java DatagramPacket - Java examples - Java programs
Constructors of DatagramPacket class
- DatagramPacket(byte[] barr, int length): it creates a datagram packet.It is used to receive the packets.
- DatagramPacket(byte[] barr, int length, InetAddress address, int port): it creates a datagram packet.It is used to send the packets.
Sending DatagramPacket by DatagramSocket
//DSender.java
import java.net.*;
public class DSender{
public static void main(String[] args) throws Exception {
DatagramSocket ds = new DatagramSocket();
String str = "Welcome to wikitechy java tutorial";
InetAddress ip = InetAddress.getByName("192.168.1.1");
DatagramPacket dp = new DatagramPacket(str.getBytes(), str.length(), ip, 3000);
ds.send(dp);
ds.close();
}
} click below button to copy the code. By - java tutorial - team
Receiving DatagramPacket by DatagramSocket
//DReceiver.java
import java.net.*;
public class DReceiver{
public static void main(String[] args) throws Exception {
DatagramSocket ds = new DatagramSocket(3000);
byte[] buf = new byte[1024];
DatagramPacket dp = new DatagramPacket(buf, 1024);
ds.receive(dp);
String str = new String(dp.getData(), 0, dp.getLength());
System.out.println(str);
ds.close();
}
}