Sharable_Java_Python.pdf

<Codemithra />
Java & Python | Parallel Course

Programming Paradigms
Functional/procedural programming:
Program is a list of instructions to the computer
Object-oriented programming
Program is composed of a collection objects that communicate with each other

Python
Source
Code
Compiler Byte Code Interpreter Processor

First Program
print("Hello, World!")
class Main {
public static void main(String args[]){
System.out.println("Hello, World!");
}
}

a = 10
b = 10.4
c = "String"
d = 'single quoted string'
e = True
print("a, b, c, d, e", a, b, c, d, e)
class Main {
public static void main(String[] args) {
int a = 10;
float b = 10.4f;
String c = "String";
// Not possible
// String d = 'String';
boolean e = true;
System.out.println("a, b, c, e " + a + " " + b + " " + c + " " + e);
}
}
Variables

Numbers in Python
a = 10
print(a, type(a))
a = float(a)
print(a, type(a))
a = complex(a)
print(a, type(a))
a = complex(a, a)
print(a, type(a))

Numbers in Java
class Main {
Integer a = 10;
Float b = 10.4f;
Double c = 10.4d;
System.out.println("a, b, c " + a + " " + b + " " + c);
}
}

Number methods
print("math.floor " , math.floor(81.5));
print("math.ceil " , math.ceil(81.5));
print("math.round " , math.round(81.5));
print("math.exp " , math.exp(3));
class Main {
System.out.println("Math.floor " + Math.floor(81.5));
System.out.println("Math.ceil " + Math.ceil(81.5));
System.out.println("Math.round " + Math.round(81.5));
System.out.println("Math.exp " + Math.exp(3));
}
}

Number methods
print("math.abs " , math.abs(-6));
print("math.sqrt " , math.sqrt(81));
print("Integer.max " , max(5, 6));
print("Integer.min" , min(5, 6));
class Main {
System.out.println("Math.abs " + Math.abs(-6));
System.out.println("Math.sqrt " + Math.sqrt(81));
System.out.println("Integer.max " + Integer.max(5, 6));
System.out.println("Integer.min" + Integer.min(5, 6));
}
}

String methods
str = "ethnus"
print(str.endswith("nus"))
print(str.startswith("eth"))
print(str.isdigit())
print(str.isspace())
class Main {
String str = "ethnus tech";
Character c = '3';
System.out.println(str.endsWith("nus"));
System.out.println(str.startsWith("eth"));
System.out.println(Character.isDigit(c));
System.out.println(Character.isSpace(c));
}
}

String methods
str = "ethnus"
print(str.upper())
print(str.lower())
class Main {
String str = "ethnus tech";
System.out.println(str.toUpperCase());
System.out.println(str.toLowerCase());
}
}

Arithmetic Operators
print(a + b) System.out.println(a + b) 110
print(a - b) System.out.println(a - b) 90
print(a / b) System.out.println((float) a / b) 10.0
print(a * b) System.out.println(a * b) 1000
print(a ** b) System.out.println(Math.pow(a, b)) 100000000000000000000
print(a // b) System.out.println(a / b) 10
print(a % b) System.out.println(a % b) 0
a = 100, b = 10

Comparison Operators
print(a == b) System.out.print(a == b) False
print(a > b) System.out.print(a > b) True
print(a >= b) System.out.print(a >= b) True
print(a < b) System.out.print(a < b) False
print(a <= b) System.out.print(a <= b) False
print(a != b) System.out.print(a != b) True
print(a == b) System.out.print(a == b) False
a = 100, b = 10

Bitwise Operators
print(a & b) System.out.print(a & b) 0
print(a | b) System.out.print(a | b) 6
print(a << 1) System.out.print(a << 1) 4
print(a >> 1) System.out.print(a >> 1) 1
print(a ^ b) System.out.print(a ^ b) 6
a = 2, b = 4

Logical Operators
print(a and b) System.out.print(a && b) False
print(a or b) System.out.print(a || b) True
print(not a) System.out.print(!a) False
a = True, b = False

Ternary Operator
a = 100
b = 10
min = a < b and a or b
print(min)
class Main {
int a = 100;
int b = 10;
int min = a < b ? a : b;
System.out.println(min);
}
}

Branching
a = ''
if a:
print("Value of a = ", a)
else:
print("False value in a")
a = 0
if a:
else:
a = -1
if a:
else:
a = False
if a:
else:

Branching
class Main {
boolean a = true;
if(a)
System.out.println("A is true");
else
System.out.println("A is false");
}
}
class Main {
int a = 5;
if(a)
System.out.println("A is true");
else
System.out.println("A is false");
}
}

Branching
a = 5
if a:
print("a is not False")
if a > 3:
print("a is greater than 3")
else:
print("a is lesser than or equal to 3")
class Main {
int a = 5;
if(a > 0) {
if(a > 3) {
System.out.println("a is greater than 3");
} else {
System.out.println("a is greater than 3");
}
}
}
}

Branching
public class Main {
char grade = 'B';
switch(grade) {
case 'A' :
System.out.println("Excellent!");
break;
case 'B' :
case 'C' :
System.out.println("Well done");
break;
case 'D' :
System.out.println("You passed");
break;
default :
System.out.println("Invalid grade");
}
System.out.println("Your grade is " + grade);
}
}

Looping
count = 0
while (count < 9):
print(count)
count = count + 1
class Main {
int count = 0;
while (count < 9) {
System.out.println(count);
count = count + 1;
}
}
}

Looping
count = 0
while (count < 9):
if count == 4:
count = count + 1
continue
print(count)
count = count + 1
class Main {
int count = 0;
while (count < 9) {
if(count == 4) {
count = count + 1;
continue;
}
count = count + 1;
}
}
}

Looping
count = 0
for count in range(0,9):
if count == 4:
continue
print(count)
class Main {
int count;
for(count = 0; count < 9; count++) {
if (count == 4)
continue;
}
}
}
count = 0
if count == 4:
break
print(count)
class Main {
int count;
if (count == 4)
break;
}
}
}

Looping
count = 0
if count == 4:
continue
else:
print(count)
class Main {
int count;
if (count == 4)
continue;
else
}
}
}
count = 0
if count == 4:
pass
print(count)
class Main {
int count;
if (count == 4) {
}
}
}
}

Looping
x = 10
while True:
print(x)
x = x + 1
if x > 19:
break
public class Main {
int x = 10;
do {
System.out.print(x + "t");
x = x + 1;
} while( x < 20 );
}
}

Looping
x = 10
while True:
print(x)
x = x + 1
if x > 19:
break
public class Main {
int i, j;
for(i = 1; i < 5; i++) {
System.out.println();
for(j = i; j > 0; j--) {
System.out.print(j + " ");
}
}
}
}

Input
age = input("Enter your age")
print("Entered age is ", age)
import java.util.Scanner;
class Main {
int age;
Scanner scanner = new Scanner(System.in);
System.out.println("Enter your age");
age = scanner.nextInt();
System.out.println("Entered age is " + age);
}
}

Classes
class Player:
def __init__(self, name, role, rating):
self.name = name
self.role = role
self.rating = rating
class Player {
String name;
String role;
int rating;
Player(String name, String role, int rating) {
this.name = name;
this.role = role;
this.rating = rating;
}
}

Creating Objects
class Player:
def __init__(self, name, role):
self.name = name
self.role = role
def getRole(self):
return self.role
dhoni = Player("Dhoni", 'wicket keeper')
yadav = Player("Yadav", 'bowler')
print(dhoni.getRole())
print(yadav.getRole())

Creating Objects
class Player {
String name;
String role;
Player(String name, String role) {
this.name = name;
this.role = role;
}
String getRole() {
return this.role;
}
}
class Main {
Player dhoni = new Player("Dhoni", "wicket keeper");
Player yadav = new Player("Yadav", "bowler");
System.out.println(dhoni.getRole());
System.out.println(yadav.getRole());
}
}

Creating Objects
class Player:
def __init__(self, name = "", role = ""):
self.name = name
self.role = role
def getRole(self):
return self.role
dhoni = Player()
yadav = Player("Yadav", 'bowler')
print(dhoni.getRole())
print(yadav.getRole())

class Player {
String name;
String role;
Player() {
}
Player(String name, String role) {
this.name = name;
this.role = role;
}
String getRole() {
return this.role;
}
}
class Main {
Player dhoni = new Player();
Player yadav = new Player("Yadav", "bowler");
System.out.println(dhoni.getRole());
System.out.println(yadav.getRole());
}
}
Creating Objects

Aggregation in Python
class Shoe:
def __init__(self, size):
self.size = size
class Player:
def __init__(self, name, shoe):
self.name = name
self.shoe = shoe
shoe_eight = Shoe(8)
shoe_seven = Shoe(7)
dhoni = Player("Dhoni", shoe_eight)
jaddu = Player("Jadeja", shoe_seven)
print(dhoni.shoe.size)
print(jaddu.shoe.size)

Aggregation in Java
class Shoe {
int size;
Shoe(int size) {
this.size = size;
}
}
class Player {
String name;
Shoe shoe;
Player(String name, Shoe shoe) {
this.name = name;
this.shoe = shoe;
}
}
class Main {
public static void main(String a[]) {
Shoe shoe_eight = new Shoe(8);
Shoe shoe_seven = new Shoe(7);
Player dhoni = new Player("Dhoni", shoe_eight);
Player jaddu = new Player("Jadeja", shoe_seven);
System.out.println(dhoni.shoe.size);
System.out.println(jaddu.shoe.size);
}
}

Googly
class Shoe:
self.size = size
class Player:
self.name = name
self.shoe = shoe
def displayShoe(self):
print(self.size)
class Shoe:
self.size = size
class Player:
self.name = name
self.shoe = shoe
def displayShoe(self):
print(self.shoe.size)
dhoni.displayShoe()
jaddu.displayShoe()

Swapped?
class Shoe:
self.size = size
class Player:
self.name = name
self.shoe = shoe
def swap(self, other):
other = self
dhoni.swap(jaddu)
print(dhoni.shoe.size)
print(jaddu.shoe.size)

class Shoe {
int size;
Shoe(int size) {
this.size = size;
}
}
class Player {
String name;
Shoe shoe;
Player(String name, Shoe shoe) {
this.name = name;
this.shoe = shoe;
}
void swapShoe(Player other) {
other.shoe = this.shoe;
}
}
class Main {
Shoe shoe_eight = new Shoe(8);
Shoe shoe_seven = new Shoe(7);
Player dhoni = new Player("Dhoni", shoe_eight);
Player jaddu = new Player("Jadeja", shoe_seven);
dhoni.swapShoe(jaddu);
System.out.println(dhoni.shoe.size);
System.out.println(jaddu.shoe.size);
}
}
Swapped?

Association in Python
class Bat:
def __init__(self, company):
self.company = company
class Player:
def __init__(self, name):
self.name = name
def batting(self, bat):
print("I use " + bat.company)
mrf = Bat("MRF Bat");
ss = Bat("SS Bat");
sachin = Player("Dhoni")
dhoni = Player("Jadeja")
dhoni.batting(mrf)
sachin.batting(ss)

class Bat {
String company;
Bat(String company) {
this.company = company;
}
}
class Player {
String name;
Player(String name) {
this.name = name;
}
void batting(Bat bat) {
System.out.print("I use ");
System.out.println(bat.company);
}
}
class Main {
Bat mrf = new Bat("MRF Bat");
Bat ss = new Bat("SS Bat");
Player dhoni = new Player("Dhoni", ss);
Player sachin = new Player("Sachin", mrf);
sachin.batting(mrf);
dhoni.batting(ss);
}
}
Association in Java

Difference between association & aggregation
Instance Variable
Local Variable

Inheritance
class Employee:
def __init__(self, id):
self.id = id
class FullTime(Employee):
def __init__(self, id, name):
super().__init__(id)
self.name = name
def printDetails(self):
print(self.id, self.name)
aravind = FullTime(1001, "Aravind")
raghavan = FullTime(1002, "Raghavan")
aravind.printDetails()
raghavan.printDetails()

Inheritance
class Employee {
int id;
Employee(int id) {
this.id = id;
}
}
class FullTime extends Employee {
String name;
FullTime(int id, String name) {
super(id);
this.name = name;
}
void printDetails() {
System.out.print(this.id);
System.out.println(this.name);
}
}
class Main {
FullTime aravind = new FullTime(1001, "Aravind");
FullTime raghavan = new FullTime(1002, "Raghavan");
aravind.printDetails();
raghavan.printDetails();
}
}

Inheritance
class Employee:
def __init__(self, id, private):
self.id = id
self.__private = private
def __init__(self, id, name):
super().__init__(id, "Something")
self.name = name
def printDetails(self):
print(self.id, self.name)
aravind = FullTime(1001, "Aravind")
print(aravind.id)
print(aravind.__private) #print(aravind._Employee__private)
print(aravind.name)

Inheritance
class Employee {
private int id;
Employee(int id) {
this.id = id;
}
}
String name;
FullTime(int id, String name) {
super(id);
this.name = name;
}
}
class Main {
FullTime aravind = new FullTime(1001, "Aravind");
System.out.println(aravind.name);
System.out.println(aravind.id);
}
}

Access Specifiers in Java
Same Package Different Package
Inside Class Outside Class Inherited Classes Other Classes
public ✔ ✔ ✔ ✔
protected ✔ ✔ ✔ ✘
default ✔ ✔ ✘ ✘
private ✔ ✘ ✘ ✘

Calling inherited method
class Employee:
def __init__(self):
pass
def method(self):
print("I am here")
def __init__(self):
self.method()
aravind = FullTime()

Calling inherited method
class Employee {
void method() {
System.out.println("I am here");
}
}
public FullTime() {
this.method();
}
}
class Demo01 {
FullTime aravind = new FullTime();
}
}

Dynamic Polymorphism
class Employee {
void method() {
}
}
void method() {
System.out.println("FullTime");
}
void myMethod() {
System.out.println("myMethod");
}
}
class Demo01 {
Employee aravind = new FullTime();
aravind.method();
}
}

Dynamic Polymorphism
class Employee {
void method() {
}
}
void method() {
System.out.println("FullTime");
}
void myMethod() {
System.out.println("myMethod");
}
}
class Demo01 {
Employee aravind = new FullTime();
aravind.myMethod();
}
}

Abstract class
from abc import ABC, abstractmethod
class Employee(ABC):
@abstractmethod
def work(self):
pass
def work(self):
print("50Hrs")
class PartTime(Employee):
def work(self):
print("20Hrs")
aravind = FullTime()
aravind.work()

Abstract class
abstract class Employee {
abstract void work();
}
void work() {
System.out.println("50Hrs");
}
}
class PartTime extends Employee {
void work() {
System.out.println("20Hrs");
}
}
class Main {
FullTime aravind = new FullTime();
aravind.work();
}
}

Let’s ask
What happens if we didn’t
override the abstract method in
child?
What happens if we try to create
object for abstract class?
How can we call concrete
method from an abstract class?

Exceptions!
a = 5
b = 0
try:
c = a / b
print("No exception")
except:
print("Exception")
class Main {
public static void main(String args[]) {
int a = 5, b = 0;
try {
int c = a / b;
System.out.println("No exception");
} catch(Exception e) {
System.out.println("Exception");
}
}
}

Exceptions!
a = 5
b = 0
try:
c = a / b
print("No exception")
except:
print("Exception")
finally:
print("Anyways")
class Main {
int a = 5, b = 0;
try {
int c = a / b;
System.out.println("No exception");
} finally {
System.out.println("Anyways");
}
}
}

Our own exceptions
class
MyException(Exception):
pass
a = 5
b = 0
try:
raise MyException()
except:
print("Exception")
class MyException extends Exception {
}
class Main {
try {
throw new MyException();
} catch(MyException e) {
}
}
}

Our own exceptions
def someFun():
raise Exception()
try:
someFun()
except:
print("Exception")
class Main {
public static void method() throws Exception {
throw new Exception();
}
try {
Main.method();
}
}
}

About a static
class Animal:
def walk():
print("Static method")
dog = Animal()
Animal.walk()
dog.walk()
class Animal {
public static void method() {
System.out.println("Static method");
}
}
class Main {
Animal dog = new Animal();
dog.method();
Animal.method();
}
}

About a final
class Animal {
final int age = 5;
}
class Main {
Animal dog = new Animal();
dog.age = 10;
}
}

About a final
class Animal {
int age = 5;
final void method() {
System.out.println("A Method");
}
}
class Dog extends Animal {
void method() {
System.out.println("D Method");
}
}
class Main {
Dog dog = new Dog();
dog.method();
}
}

About a final
final class Animal {
int age = 5;
void method() {
System.out.println("A Method");
}
}
class Dog extends Animal {
void method() {
System.out.println("D Method");
}
}
class Main {
Dog dog = new Dog();
dog.method();
}
}

Creating connection
import mysql.connector
mydb = mysql.connector.connect(
host="localhost", user="root", passwd="", database="test"
)
print(mydb)
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
class Demo01 {
public static void main(String[] args) throws Exception {
Class.forName("com.mysql.jdbc.Driver");
String conn = "jdbc:mysql://localhost:3306/test";
String user = "root";
String pwd = "";
Connection con = DriverManager.getConnection(conn, user, pwd);
Statement stmt = con.createStatement();
}
}

Selecting data
)
mycursor = mydb.cursor()
mycursor.execute("select * from demo")
myresult = mycursor.fetchall()
for x in myresult:
print(x)
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from demo");
while(rs.next()) {
System.out.println(rs.getInt(1));
}

Inserting data
)
sql = "insert into demo (id) values (%s)"
val = (4,)
mycursor.execute(sql, val)
mydb.commit()
print(mycursor.rowcount, "record inserted.")
PreparedStatement stmt=con.prepareStatement("insert into demo (id) values
(?)");
stmt.setInt(1,5);
int i=stmt.executeUpdate();
System.out.println(i+" records inserted.");

Updating data
)
sql = "udpate demo set id = 1 where id = 2"
mycursor.execute(sql)
mydb.commit()
print(mycursor.rowcount, "record updated.")
PreparedStatement stmt=con.prepareStatement("update demo set id = (?)
where id = 4");
stmt.setInt(1,5);
int i=stmt.executeUpdate();
System.out.println(i+" records inserted.");

Hashing the passwords
import hashlib
result = hashlib.md5(b'MyPassword')
print("Hashed Password ", end ="")
print(result.hexdigest())
String myPassword = "MyPassword";
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] messageDigest = md.digest(myPassword.getBytes());
BigInteger no = new BigInteger(1, messageDigest);
String hashtext = no.toString(16);
while (hashtext.length() < 32) {
hashtext = "0" + hashtext;
}
System.out.println("Hashed Password: " + hashtext);

Encrypting a string
String key = "someKey";
String initVector = "someIntVec";
String myPassword = "MyPassword";
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(myPassword.getBytes());
String encryptedString = Base64.getEncoder().encodeToString(encrypted);
System.out.println(encryptedString);
cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] original =
cipher.doFinal(Base64.getDecoder().decode(encryptedString));
System.out.println(new String(original));

Encrypting a string
from cryptography.fernet import Fernet
message = "my deep dark secret".encode()
key = Fernet.generate_key()
f = Fernet(key)
encrypted = f.encrypt(message)
print(encrypted)
decrypted = f.decrypt(encrypted)
print(decrypted.decode())

File Writing
fo = open("E:/output.txt", "a")
fo.write( "Text from pythonn")
fo.close()
String str = "My text is heren";
FileWriter fw=new FileWriter("E:/output.txt", true);
for (int i = 0; i < str.length(); i++)
fw.write(str.charAt(i));
System.out.println("Writing successful");
fw.close();

File Reading
fo = open("E:/output.txt", "r")
for x in fo:
print(x)
fo.close()
File file = new File("E:/output.txt");
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line;
while ((line = bufferedReader.readLine()) != null) {
System.out.println(line);
}
fileReader.close();

Threads in Python
import threading
import time
fo = open("E:/output.txt", "a")
def jobA():
for x in range(1, 999):
fo.write("An")
if x % 100 == 0:
time.sleep(1)
print("Some random job A")
def jobB():
for x in range(1, 999):
fo.write("Booooooon")
if x % 100 == 0:
time.sleep(1)
print("Some random job B")

Threads in Python
t1 = threading.Thread(target=jobA)
t2 = threading.Thread(target=jobB)
t1.start()
t2.start()
t1.join()
t2.join()
fo.close()

Threads in Java
class Multi extends Thread{
public void run(){
for(int i = 0; i < 999; i++) {
System.out.println(Thread.currentThread().getName());
if(i % 100 == 0) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}

Threads in Java
class Main {
public static void main(String[] args) throws Exception {
Multi t1=new Multi();
t1.setName("A");
Multi t2 = new Multi();
t2.setName("Booooo");
t1.start();
t2.start();
t1.join();
t2.join();
System.out.println("Done!");
}
}

Introduction
WEB SERVER
WEB CLIENT
HTTP REQUEST
HTTP RESPONSE

Process
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Getting python CGI right
Check in browser
Add shebang line
&
Execute your python
Start Apache
Download XAMPP
Install
Run & start apache
Config apache
Open
xampp/apache/conf/http
d.conf
Add AddHandler
cgi-script .py
ScriptInterpreterSource
Registry-Strict
at the end of the file

First CGI Page
#!C:/Users/Aravind/AppData/Local/Programs/Python/Python36-32/python.exe
print("Content-type:text/htmlrnrn")
print('<html>')
print('<head>')
print('<title>Hello Word - First CGI Program</title>')
print('</head>')
print('<body>')
print('<h2>Hello Word! This is my first CGI program</h2>')
print('</body>')
print('</html>')

How about this form?
print('''<form action="/hello_get.cgi" method="get">
First Name: <input type="text" name="first_name"> <br />
Last Name: <input type="text" name="last_name" />
<input type="submit" value="Submit" />
</form>
''')

Get in server
import cgi, cgitb
form = cgi.FieldStorage()
first_name = form.getvalue('first_name')
last_name = form.getvalue('last_name')
print("<html>")
print("<head>")
print("<title>Hello - Second CGI Program</title>")
print("</head>")
print("<body>")
print("<h2>Hello %s %s</h2>" % (first_name, last_name))
print("</body>")
print("</html>")

Lets have some cookies
print("Set-Cookie:UserID=XYZ;")
print("Set-Cookie:Password=XYZ123;")
print("Set-Cookie:Expires=Tuesday, 31-Dec-2007 23:12:40 GMT;")
print("Set-Cookie:Domain=localhost;")
print("Set-Cookie:Path=/perl;")
print('''I have set some cookie''')

Reading the cookies
from os import environ
import cgi, cgitb
if environ['HTTP_COOKIE']:
allCookies = environ['HTTP_COOKIE'].split(';')
for cookie in allCookies:
print(cookie.split("="))
else:
print("no cookie")

Process
Run on Server
Create HTML / JSP
Run the file on server
Install Tomcat
Download Tomcat
Unzip the downloaded file
Create Dynamic Web
Create dynamic web
project
Select run time as
Tomcat with proper
version

First JSP page
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Java JSP Page</title>
</head>
<body>
<form action="process.jsp" method="get">
</form>
</body>
</html>

Reading the data
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
String name=request.getParameter("first_name");
out.print("welcome "+name);
%>
</body>
</html>

Setting the cookie
<!DOCTYPE html>
<html>
<body>
<%
Cookie cookie = new Cookie("UserID","1001");
response.addCookie(cookie);
%>
<form action="process.jsp" method="post">
</form>
</body>
</html>

Reading the cookie
<!DOCTYPE html>
<html>
<body>
<%
Cookie[] cookies = null;
cookies = request.getCookies();
if( cookies != null ) {
for (int i = 0; i < cookies.length; i++) {
out.print("Name : " + cookies[i].getName( ) + ", ");
out.print("Value: " + cookies[i].getValue( )+" <br/>");
}
}
%>
</body>
</html>

Thank You
https://codemithra.com
<Codemithra />

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