Tag:udp

Tag (udp)'s result:

java socket udp

Udpserver.java: import java.net.DatagramPacket; import java.net.DatagramSocket; public class Udpserver { public static void main(String[] args) throws Exception { System.out.println(“udp server is running……”); String str_send = “hi udpclient”; DatagramSocket se = new DatagramSocket(2016); byte[] by = new byte[1024]; DatagramPacket dp = new DatagramPacket(by,1024); while (true) { se.receive(dp); System.out.println(“the message from client is: \n”); String str_receive = new String(dp.getData(),0,dp.getLength()); System.out.println(str_receive); DatagramPacket se_send = new DatagramPacket(str_send.getBytes(),str_send.length(),dp.getAddress(),dp.getPort()); se.send(se_send); dp.setLength(1024); } //se.close(); } } Udpclient.java: import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; public class Udpclient { public static void main(String[] args) throws Exception { DatagramSocket ds = new DatagramSocket(); String str = “hi server”; DatagramPacket dp = new DatagramPacket(str.getBytes(),str.length(),InetAddress.getByName(“localhost”),2016); ds.send(dp); byte[] by = new byte[1024]; DatagramPacket dp2 = new DatagramPacket(by,1024); ds.receive(dp2); System.out.println(new String(by,0,dp2.getLength())); ds.close(); } }