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);}
}
}
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
