File operation between client and server

File

Client

import java.io.*;

import java.net.*;

import java.util.*;

class Clientfile

{              public static void main(String args[])

                {try{

                                BufferedReader in=new BufferedReader(new InputStreamReader(System.in));

                                Socket clsct=new Socket("127.0.0.1",139);

                                DataInputStream din=new DataInputStream(clsct.getInputStream());

                                DataOutputStream dout=new DataOutputStream(clsct.getOutputStream());

                                System.out.println("Enter the file name:");

                                String str=in.readLine();

                                dout.writeBytes(str+'\n');

                                System.out.println("Enter the new file name:");

                                String str2=in.readLine();

                                String str1,ss;

                                FileWriter f=new FileWriter(str2);

                                char buffer[];       

                                                while(true)

                                                {              str1=din.readLine();

                                                                if(str1.equals("-1")) break;

                                                                System.out.println(str1);

                                                                buffer=new char[str1.length()];

                                                                str1.getChars(0,str1.length(),buffer,0);

                                                                f.write(buffer);                                     }                                             

                                f.close();

                                clsct.close();          }

                catch (Exception e)

                {              System.out.println(e);         }              }}

Server

import java.io.*;

import java.net.*;

import java.util.*;

class Serverfile

{              public static void main(String args[])

                {try{       ServerSocket obj=new ServerSocket(139);

                                while(true)

                                {              Socket obj1=obj.accept();

                                                DataInputStream din=new DataInputStream(obj1.getInputStream());

                                                DataOutputStream dout=new DataOutputStream(obj1.getOutputStream());

                                                String str=din.readLine();

                                                FileReader f=new FileReader(str);

                                                BufferedReader b=new BufferedReader(f);

                                                String s;

                                                while((s=b.readLine())!=null)

                                                {              System.out.println(s);

                                                                dout.writeBytes(s+'\n');       }

                                                f.close();

                                                dout.writeBytes("-1\n");     }              }

                catch(Exception e)

                {              System.out.println(e);}       }}

Output

File content

Computer networks

jhfcgsauf

jbsdava

jbvuesagv

client

Enter the file name:

sample.txt

server

Computer networks

jhfcgsauf

jbsdava

jbvuesagv

client

Enter the new file name:

net.txt

Computer networks

jhfcgsauf

jbsdava

jbvuesagv

Destination file

Computer networks

jhfcgsauf

jbsdava

jbvuesagv