Bit Stuffing in Computer Networks - Java Program - Client Server

/* In the user data, if 5 consecutive 1s come ,we include 0 after it and send the code to server where
the inversion operation takes place and data are read.. */



CLIENT:

import java.util.Scanner;
import java.util.Arrays;
import java.net.*;
import java.io.*;

class BitStuffCli
{
public static char convert(int i)
{
if(i==1)
return '1';
else
return '0';
}

public static void main(String args[]) throws Exception
{
int a[]=new int[100];
int b[]=new int[120];
int count=0;
int n,i,j;
Scanner in=new Scanner(System.in);
System.out.println("Enter no of bits:");
n=in.nextInt();
System.out.println("Enter the bits:");
for( i=0;i<n;i++)
a[i]=in.nextInt();

for(i=0,j=0;i<n;i++,j++)
{
b[j]=a[i];
if(a[i]==1)
count++;
else
count=0;
if(count==5)
{
j++;
b[j]=0;
count=0;
}
}
String s=new String();
System.out.println("\nSent as:");
for(i=0;i<j;i++)
{
System.out.print(b[i]);
s+=convert(b[i]);
}


Socket socket = new Socket("localhost",1234);
OutputStream ostream = socket.getOutputStream();
ostream.write(s.getBytes());
}
}

SERVER:

import java.util.Scanner;

import java.util.Arrays;

import java.net.*;

import java.io.*;

class BitStuffSer

{

public static int reconvert(char c)

{ 

if(c=='1')

return 1;

else 

return 0;

}

public static void main(String args[]) throws Exception

{

int i,j,count,n;

int b[]=new int[120];

int c[]=new int[100];

byte bytes[]=new byte[1000];

ServerSocket ss = new ServerSocket(1234);

Socket socket = new Socket();

socket=ss.accept();

InputStream istream = socket.getInputStream();

istream.read(bytes);

String s = new String(bytes);

    s=s.trim();

System.out.println("Received as:"+s);

n=s.length();

for(i=0;i<n;i++)

{

b[i]=reconvert(s.charAt(i));

}

 

for(i=0,j=0,count=0;j<n;i++,j++)

{

c[i]=b[j];

if(b[j]==1)

count++;

else

count=0;

if(count==5)

{

j++;

count=0;

}

}

System.out.println("\nOriginal bits:");

for(j=i,i=0;i<j;i++)

System.out.print(c[i]);

}

}

OUTPUT:

C:\Marsh\cn>java BitStuffCli

Enter no of bits:

12

Enter the bits:

1 1 0 1 1 1 1 1 0 1 0 1

Sent as:

1101111100101

C:\Marsh\cn>java BitStuffSer

Received as:1101111100101

Original bits:

110111110101