TCP and UDP Sockets Links

AIM

To write a java program for application using TCP and UDP Sockets Links

Program

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