கதை - கவிதை -கணினி தளம் [Stories-Poems-Computer Base]: 01/11/14

Saturday, January 11, 2014

Client Server programming in Java [Simple]

//Simple server in java
import java.io.*;
import java.net.*;

public class SimpleServer{
static int reqno=0;
public static void main(String arg[])throws Exception{

ServerSocket s = new ServerSocket(6666);

while(true){

Socket s1 = s.accept(); //accepting the client socket
System.out.println("Request No is"+(reqno++));
PrintWriter pr = new PrintWriter(s1.getOutputStream());
pr.write("Hello client how are u?\n if ok need not replay\n bye");
pr.close();
s1.close();
}

}
}

//simple client program
import java.net.*;
import java.io.*;
public class SimpleClient{
public static void main(String arg[])throws Exception{

Socket s1= new Socket("localhost",6666);
InputStreamReader isr = new InputStreamReader(s1.getInputStream());
BufferedReader br = new BufferedReader(isr);
String line;
while((line=br.readLine())!=null){
System.out.println("Message :"+line+"\n");
}

br.close();
s1.close();

}
}

A Low Performance Search program in Java

import java.io.*;
import java.util.regex.*;
class FindString3
{
public static void main(String args[])
{

try
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String t;
System.out.println("Enter The text to serach : ");
t=br.readLine();

File f=new File("D:\\");
Extract(f,t);
}catch(Exception e)
{
System.out.println("Error:" + e);
}
}

public static void Extract(File f1,String text)
{
try
{
File f=f1;
File[] list=f.listFiles();
FileInputStream fi;
DataInputStream d;
String s;
Pattern pt;
Matcher mc;
int count=0 ;
for(int j=0 ; j < list.length; ++j)
{
if(list[j].isFile() && list[j].canRead())
{
fi=new FileInputStream(list[j]);
d=new DataInputStream(fi);

while((s=d.readLine()) != null)
{
pt=Pattern.compile(text);
mc=pt.matcher(s);
if(mc.find())
{
++count;
break;
}
}
if(count > 0 )
{
System.out.println(list[j].getPath() + list[j].getName());
count=0;
}
}
if(list[j].isDirectory())
Extract(list[j],text);
}

}catch(Exception e1)
{
System.out.println("Error:" + e1);
System.exit(0);
}
}
}

Sending and receiving Java Objects through network Java Program [Advanced]

/* Program for Server1 */
import java.io.*;
import java.net.*;
class Server1
{
public static void main(String args[])
{
ServerSocket ss;
Socket s;
ObjectOutputStream oos;
ObjectInputStream ois;
String st;
BufferedReader br;
try
{
ss=new ServerSocket(7070);
System.out.println("Server is register at 7070 port ");
while(true)
{
s=ss.accept();
ois=new ObjectInputStream(s.getInputStream());
System.out.println("Client Msg : " + (String)ois.readObject());
System.out.println("Server Msg : ");
br=new BufferedReader(new InputStreamReader(System.in));
st=br.readLine();
oos=new ObjectOutputStream(s.getOutputStream());
oos.writeObject(st);
}
}catch(Exception e)
{
System.out.println("Error : " + e);
System.exit(0);
}
}
}
------------------------------------------------------------------------------------------------------------------

/* Program for Client1 */
import java.io.*;
import java.net.*;
class Client1
{
public static void main(String args[])
{
Socket client;
ObjectInputStream ois;
ObjectOutputStream oos;
String s;
BufferedReader br;
try
{
client=new Socket("localhost",7070);
ois=new ObjectInputStream(client.getInputStream());
s=(String)ois.readObject();
System.out.println("Server : " + s);
System.out.println("Client : " );
br=new BufferedReader(new InputStreamReader(System.in));
s=br.readLine();
oos=new ObjectOutputStream(client.getOutputStream());
oos.writeObject(s);
}catch(Exception e)
{
System.out.println("Error : " + e);
System.exit(0);
}
}
}

Sending and receiving Java Objects through network Java Program [Simple]

//program for server

import java.io.*;
import java.net.*;
import java.util.*;
class tcpobjwrite
{
public static void main(String args[]) throws Exception
{

   ServerSocket ss;
   Socket s;
   ss = new ServerSocket(8888);
   s = ss.accept();
   ObjectOutputStream oos;
   oos = new ObjectOutputStream(s.getOutputStream());
   oos.writeObject(new Date());

   oos.close();
   s.close();
   ss.close();
}
}

------------------------------------------------------------------------

/* Program for client */
import java.io.*;
import java.net.*;
import java.util.*;
class tcpobjread
{
public static void main(String args[]) throws Exception
{

Socket s;
s = new Socket("localhost",8888);

   ObjectInputStream ois;
   ois = new ObjectInputStream(s.getInputStream());
   Date d = (Date)ois.readObject();

System.out.println("Hello"+d);
ois.close();

}
}

Finding the phrases of a string in Java

import java.util.regex.*;

public class main{

p.s.v.m() t{

String search = "how are you";

Pattern p = Pattern.compil(search);

Matcher m = p.matcher("hello world how are you");

boolean b = m.find();

S.o.p(b);

if(b) S.o.p("found");

else

S.o.p("not found");

}

MCA UNIX Programming Practical University of Madras

/* 1.LICENCE */

CODING:

i=18

echo enter your age

read n

echo your age is $n

if [ $n -gt 18 ]

then

echo you are allowed to drive the car

if [ $n -lt 16 ]

then

echo you are not allowed to drive the car

w=`expr $i - $n`

echo you have to wait for $w years

OUTPUT:

user@ubuntu:~$ sh mk.sh

enter your age

your age is 20

you are allowed to drive the car

user@ubuntu:~$ sh mk.sh

enter your age

your age is 12

you are not allowed to drive the car

you have to wait for 6 years

/* 2.LEAP YEAR */

CODING:

echo enter the month

read m

echo enter the year

read y

if [ `expr $y % 4` -eq 0 -a `expr $y % 100` -ne 0 -o `expr $y % 100` -eq 0 -a `expr $y % 400` -eq 0 ]

then

echo $y is a leap year

if [ $m -eq 2 ]

then

echo No.of days in this month is 29

else

echo $y is not a leap year

if [ $m -eq 2 ]

then

echo no of days in this month is 28

if [ $m -eq 1 -o $m -eq 3 -o $m -eq 5 -o $m -eq 7 -o $m -eq 8 -o $m -eq 10 -o $m -eq 12 ]

then

echo $y is a leap year

if [ $m -eq 2 ]

then

echo No.of days in this month is 29

else

echo $y is not a leap year

if [ $m -eq 2 ]

then

echo no of days in this month is 28

if [ $m -eq 1 -o $m -eq 3 -o $m -eq 5 -o $m -eq 7 -o $m -eq 8 -o $m -eq 10 -o $m -eq 12 ]

then

echo no of days in this month is 31

if [ $m -eq 4 -o $m -eq 6 -o $m -eq 9 -o $m -eq 11 ]

then

echo no of days in this month is 30

OUTPUT:

user@ubuntu:~$ sh leap.sh

enter the month:2

enter the year:2000

2000 is a leap year

enter the month:6

enter the year:2012

2012 is a leap year

no of days in this month is 30

3.PRIME/ARMSTRONG/PERFECT

CODING:

echo enter a number

read n

i=2

flag=1

while [ $i -lt $n ]

c=`expr $n % $i`

if [ $c -eq 0 ]

then

flag=0

break

i=`expr $i + 1`

done

if [ $flag -eq 1 ]

then

echo $n is prime

else

echo $n is not prime

OUTPUT:

user@ubuntu:~$ sh pri.sh

enter a number:23

23 is prime

enter a number: 18

18 is not prime

/*B.ARMSTRONG NUMBER */

CODING:

echo enter the number

sum=0

read n

n1=$n

while [ $n1 -gt 0 ]

s=`expr $n1 % 10`

n1=`expr $n1 / 10`

sum=`expr $sum + $s \* $s \* $s`

done

if [ $sum -eq $n ]

then

echo $n is a armstrong no

else

echo $n is not a armstrong no

OUTPUT:

user@ubuntu:~$ sh arm1.sh

enter the number

153

153 is a armstrong no

user@ubuntu:~$ sh arm1.sh

enter the number

154

154 is not a armstrong no

/*C.Perfect Number*/

CODING:

echo Enter the number

read n

dn=`expr $n \* 2`

i=1

sum=0

echo The divisors are

while [ $i -le $n ]

if [ `expr $n % $i` -eq 0 ]

then

sum=`expr $sum + $i`

echo $i

i=`expr $i + 1`

done

echo sum = $sum

echo dn = $dn

if [ $sum -eq $dn ]

then

echo $n is a perfect no

else

echo $n is not a perfect no

OUTPUT:

user@ubuntu:~$ sh perfect.sh

Enter the number

The divisors are

sum = 56

dn = 56

28 is a perfect no

/*4.REVERSE ORDER*/

CODING:

x=" "

echo -n "numbers are :"

for n in $@

echo -n $n

echo -n " "

x="$n $x"

done

echo " "

echo -n "reverse order :"

echo $x

OUTPUT:

user@ubuntu:~$ sh revers.sh 1 2 3 4 5 6 7 8 9

numbers are :1 2 3 4 5 6 7 8 9

reverse order :9 8 7 6 5 4 3 2 1

/*5.HANDLING ARGUMENTS*/

CODING:

echo First arg is :$1

echo third argument :$3

echo tenth argument :${10}

echo total ags $#

echo the arguments are

for n in $@

echo -n $n

echo -n " "

done

shift

echo

echo the remaing no of args $#

for n in $@

echo -n $n

OUTPUT:

user@ubuntu:~$ sh parame.sh 1 2 3 4 5 6 7 8 9 10

First argument is :1

third argument is :3

tenth argument is :10

total arguments: 10

the arguments are:

1 2 3 4 5 6 7 8 9 10

the remaining no of arguments are:

7 4 5 6 7 8 9 10

/*6.COPY REMOVE MOVE FILE*/ CODING:

Clear

echo "menu"

echo "1.copy a file"

echo "2.remove a file"

echo "3.move a file"

echo "4.quit"

echo "Enter your choice \c"

read choice

case "$choice" in

1)echo "Enter file name to copy \n"

read f1

echo "Enter file name \c"

read f2

if [ -f $f1 ]

then

cp $f1 $f2

else

echo "$f1 does not exist"

;;

2)echo "Enter the file to be removed"

read r1

if [ -f $r1 ]

then

rm -i $r1

else

echo "$r1 file does not exist"

;;

3)echo "Enter the file name to move \c"

read f1

echo "Enter destination \c"

read f2

if [ -f $f1 ]

then

if [ $f2 ]

then

mv $f1 $f2

echo "$f1 does not exist"

;;

4)echo "exit"

exit ;;

esac

OUTPUT:

1.copy a file

2.remove a file

3.move a file

4.quit

Enter your choice 1

Enter file name to copy

one.sh

Enter file name two.sh

/*7.LOGIN OR NOT*/

CODING:

read u

if [ `who | grep -c $u` -eq 0 ]

then

echo "$u IS NOT LOGGED INTO THE SERVER !!!"

echo

exit 0

else

echo

echo "$u IS LOGGED INTO THE SERVER !!!"

echo

OUTPUT:

user@ubuntu:~$ sh login.sh

u IS LOGGED INTO THE SERVER !!!

t IS LOGGED INTO THE SERVER !!!

/* 8.FILE PERMISSION */

CODING:

echo -n "Enter File Name :"

read file

[ -w $file ] && W="Write = Yes" || W="Write = No"

[ -x $file ] && X="Execute = Yes" || X="Execute = No"

[ -r $file ] && R="Read = Yes" || R="Read = No"

[ -d $file ] && D="Directory" || D="Directory = No"

echo "$file permissions"

echo "$W"

echo "$R"

echo "$X"

echo "$D"

OUTPUT:

user@ubuntu:~$ sh permission.sh

Enter File Name :per.sh

per.sh permissions

Write = Yes

Read = Yes

Execute = No

Directory = No

/*9. NEWS UPDATE*/

CODING:

echo enter 1 for the all news and 2 for new news

read n

if [ $n -eq 1 ]

then

echo this will display all news new and old news -a | more

if [ $n -eq 2 ]

then

echo this will display only new news

news | more

OUTPUT:

user@ubuntu:~$ sh news.sh

enter 1 for the all news and 2 for new news

this will display all news new and old news –a

/*10. DOWNLOAD OR UPLOAD THE FILE*/

CODING:

echo enter the file name

read fn

echo enter 1 for upload 2 for download

read n

if [ $n -eq 1 ]

then

echo file is beeing uploaded

curl -K -F myfile=@one.sh -H `HTTP_AUTH_LOGIN:admin` -H `HTTP_AUTH_PASSWD:password` http://google.com

if [ $n -eq 2 ]

then

echo file is beeing downloaded

curl $fn

OUTPUT:

user@ubuntu:~$ sh download.sh

enter the file name

one.sh

enter 1 for upload 2 for download

file is beeing uploaded

/*11. CAT COMMAND*/

CODING:

echo enter the file name to display

read fn

echo enter the column no

echo another way to print the file content is

if [ $n -eq 1 ]

then

cat $fn | awk '{print $1}'

if [ $n -eq 2 ]

then

cat $fn | awk '{print $2}'

if [ $n -eq 3 ]

then

cat $fn | awk '{print $3}'

OUTPUT:

user@ubuntu:~$ sh filedisplay.sh

enter the file name to display

one1.c

enter the column no

another way to print the file content is

#include

void

{

printf

}

user@ubuntu:~$ sh filedisplay.sh

enter the file name to display

one1.c

enter the column no

another way to print the file content is

<stdio.h>

main()

("hello");

/*12. SIMULATE FIND COMMAND*/

CODING:

read fname

i=`ls | grep -c $fname`

echo $i

if [ $i -eq 1 ]

then

echo

echo "$fname found!!!"

echo

exit 0

else

echo

echo "$fname not found!!!"

echo

OUTPUT:

user@ubuntu:~$ sh find.sh

one.c

one.c found!!!

user@ubuntu:~$ sh find.sh

one.sh

one.sh not found!!!

/*13.REMOVE DUPLICATE WORDS */

CODING:

echo removing duplicate words

echo enter the file name

read fn

sort -u $fn

OUTPUT:

user@ubuntu:~$ sh thirteen.sh

removing duplicate words

enter the file name

two.txt

hello

world

/* 14. Electricity Billing System */

awk '{print $1"\t" $2"\t" $3 "\t"$4"\t" $5"\t" $6}' ebhead.dat

awk '

{

{ u = $3 - $4 }

{ a = u * 3 }

{print $1"\t"$2"\t"$3"\t"$4"\t"u"\t"a"\t"}

{c = 0;}

}' eb.dat

eb.dat

1000 sun 8787 8666

1001 sen 9999 9888

behead.dat

Number Name C-R P-R Unit RS

Output

Number Name C-R P-R Unit RS

1000 sun 8787 8666 121 363

1001 sen 9999 9888 111 333

/*15. Student Mark List */

awk '{print $1"\t" $2"\t" $3 "\t"$4"\t" $5"\t" $6"\t" $7"\t" $8"\t" $9}' head.dat

awk '

{

for(i = 2; i<= NF; i++)

{ c = c + $i }

{ a = c / 5}

{print $1"\t"$2"\t"$3"\t"$4"\t"$5"\t"$6"\t"$7"\t"c"\t"a"\t"}

{c = 0;}

}' st.dat

st.dat

1000 sun 50 50 50 50 50

1001 sen 60 60 60 60 60

head.dat

Name No M1 m2 m3 m4 m5 total Avg

Output

Name No M1 m2 m3 m4 m5 total Avg

1000 sun 50 50 50 50 50 250 50

1001 sen 60 60 60 60 60 300 50