13. Write a JAVA program which uses Datagram Socket for Client Server Communication.

/* Client.java  */

import java.io.*;
import java.net.*;
class client
    {
        public static void main(String args[]) throws Exception
           {
String fname=null;
String readval=null;
Socket skt=new Socket("192.168.4.93",1900);//host and port number
InputStream is=skt.getInputStream();
OutputStream os=skt.getOutputStream();
DataInputStream dis=new DataInputStream(is);
DataOutputStream dos=new DataOutputStream(os);
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
System.out.print("\nENTER FILE NAME : ");
fname=in.readLine();
dos.writeUTF(fname);
readval=dis.readUTF();
System.out.println("\n"+readval);
skt.close();
  }
     }

/*Server.java*/

import java.io.*;
import java.net.*;
class server
     {
      public static void main(String args[]) throws Exception
              {
String fname=null;
String data="";
ServerSocket sskt=new ServerSocket(1900);
System.out.println("\nSERVER STARTED ...");
Socket skt=sskt.accept();
InputStream is=skt.getInputStream();
OutputStream os=skt.getOutputStream();
DataInputStream dis=new DataInputStream(is);
DataOutputStream dos=new DataOutputStream(os);
char ch;
int i;
fname=dis.readUTF();
FileInputStream fin=new FileInputStream(fname);
while((i=fin.read())!=-1)
    {
ch=(char)i;
data=data+ch;
    }
dos.writeUTF(data);
System.out.println("\nRESPONDED SUCCESSFULLY");
    }
     }