Networking

 

 

Program for Character Stuffing:

 

import java.util.*;
class Char
{
    public static void main(String r[])
    {   
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter number of characters: ");
        int n=sc.nextInt();
        String in[]=new String[n];
        for(int i=0;i<n;i++)
        {
            in[i]=sc.next();
        }
        for(int i= 0;i<n;i++)
        {
            if(in[i].equals("dle"))
            {
                in[i]="dle dle";
            }
        }
        System.out.println("Transmitted message is: ");
        System.out.print(" dle stx ");
        for(int i=0;i<n;i++)
        {
            System.out.print(in[i]+" ");
        }
        System.out.println(" dle etx ");
    }
}


Example:
Sample output:
Enter number of characters:
5
a b dle dle d e
Transmitted message is:
dle stxa b dle dle dle dle d dle etx

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Program for Bit Destuffing

//Removing a zero(0) after a series of 5 consecutive one's(1)


import java.util.*;
class BitDestuffing
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
int []arr=new int[20];
int cnt=0;
int m=0;
System.out.print("Enter string length: ");


 int a=input.nextInt();
System.out .print("Enter a string: ");

for(int i=0;i<a;i++)
{
arr[i]=input.nextInt();
}
for(int i=0;i<a;i++)
{
if(arr[i]==1)
cnt++;
else
cnt=0;

if(cnt==5)
{
if(arr[i+1]==0)
i=i++;
m=i+1;
cnt=0;
}
}

System.out.println("Your String is:");
for(int i=0;i<a;i++)
{
if(i==m)
{}
else
System.out.print(arr[i]);
}


}
}

Program of BitStuffing

//Inserting a zero(0) after a series of five consecutive one's(1)

import java.util.*;
class BitStuffing
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
int []arr=new int[20];
int cnt=0;
System.out.print("Enter string length: ");

int a=input.nextInt();
System.out .print("Enter a string: ");

for(int i=0;i<a;i++)
{
arr[i]=input.nextInt();
}
for(int i=0;i<a;i++)
{
if(arr[i]==1)
cnt++;
else
cnt=0;

if(cnt==5)
{
arr[i]=10;
cnt=0;
}
}

System.out.println("Your String is:");
for(int i=0;i<a;i++)
{
System.out.print(arr[i]);
}


}
}

Program to find out number of IP's conected to the given website

import java.net.*;
import java.util.*;
class NoOfIp
{
public static void main(String args[])throws Exception
{
Scanner s=new Scanner(System.in);
System.out.println("Enter the url: ");
String site=s.next();
InetAddress[] i=InetAddress.getAllByName(site);
int j;
for(j=0;j<i.length;j++)
System.out.println(i[j]);

System.out.println("Number of ip found are: "+j );
}

}

Program to fetch the source code of a given website

import java.net.*;
import java.util.*;
import java.io.*;
class FetchCode
{
public static void main(String args[])throws Exception
{
Scanner s=new Scanner(System.in);
System.out.println("Enter the url: ");
String site=s.next();
URL u=new URL(site);
BufferedReader br=new BufferedReader(new InputStreamReader(u.openStream()));
String line;
while((line=br.readLine())!=null)
System.out.println(line);

br.close();

}
}

Program to obtain the IP address of a given website address.


import java.net.*;
import java.util.*;
class Ip
{
public static void main(String args[])
{
try{

Scanner sc=new Scanner(System.in);
System.out.println("Enter the url");

String url=sc.next();

//String url=args[0];                   //By Command line

InetAddress i=InetAddress.getByName(url);
System.out.println("Host address:" +i.getHostAddress());
System.out.println("Host name   :"+i.getHostName());
}
catch(Exception e)
{}
}
}







PROGRAM TO FIND OUT YOUR OWN IP ADDRESS.

class MyIp
{
public static void main(String args[])
{

try
{

InetAddress i =InetAddress.getLocalHost();

String name=i.getHostAddress();

String hname=i.getHostName();

System.out.println("Ip address= "+name);

System.out.println("Ip name= "+i);

System.out.println("Host name= "+hname);

}
catch(Exception e)
{}

}
}