Practical File of Web Developement

8/13/2019 Practical File of Web Developement

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PRACTICALFILE OF WEB DEVELOPMENT

PANKAJGILL

PRACTICALFILE OFWEB DEVELOPMENT

VAISH COLLEGE OF ENGINEERING

SUBMITTEDTO SUBMITTEDBY

Mr.Kulwinder Singh Pankaj GillAsst. Professor 11/CSE/168CSE Deptt. CSE-B


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PANKAJGILL

INDEX Aim Page Remarks

1. Write a simple java program 1

2. Write a program to show conversionTemperature from Celsius to Fahrenheit andFahrenheit to Celsius

2

3. Write a program to find the no and sum of all

integers greater than 100 and less than 200that are divisible by 7.

6

4. Write a program to show a Grading system 8

5. Write a program to print a format using * inincreasing order

10

6 Write a program to find out some of digits ofany integer number

12

7. Write a program to show the Multiplicationtable

14

8. Write a program to show ConstructorMethod

16

9. Write a program to show MethodOverloading

18

10. Write a program to show Method Overriding 20

11. Write a program to show Polymorphism usingInheritance

22

12. Write a program to show Inheritance 25

13. Write a program to show Swapping of twoStrings

27

14. Write a program to show Multiplication oftwo Matrices

30

15. Show the Life Cycle of an Applet 34

16. Write a program to show a simple Applet 38


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PANKAJGILL 11/CSE/168

1

PROGRAM NO. 1Write a simple java program

class Sample

{

public static void main(String args[])

{

System.out.println("=== Hello java ====");

}

}


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2

OUTPUT


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3

PROGRAM NO. 2Write a program to show conversion Temperature from Celsius

to Fahrenheit and Fahrenheit to Celsius

Import.java.util.*;

class Temp

{

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

IOException

{

Scanner cin=new Scanner(System.in);

intch;

System.out.println("\n Press 1 for Centigrate to

Farnhit OR 2 for Farnhit to Centigrate\n");

ch=cin.nextInt();

if(ch==1)

{

Scanner cin1=new Scanner(System.in);

System.out.println("Enter temp in centigrate");

float c;

float f;

c=cin1.nextFloat();

f=(9*c+160)/5;

System.out.println( "The temperature in

Fahrenheit scale is :"+f);


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4

}

else if(ch==2)

{


System.out.println("Enter temp in Farnhit");

float c;

float f;

f=cin2.nextFloat();

c=(5*f-160)/9;

System.out.println( "The temperature in

centigrate scale is :"+c);

}

else

{

System.out.println("wrong choice Try Again

!!!!");

}

}

}


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5

OUTPUT


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6

PROGRAM NO. 3Write a program to find the no and sum of all integers greater

than 100 and less than 200 that are divisible by 7.

classFindSumIntCompute

{

public static void main(String[] args)

{

int sum = 0;

for (inti=100; i


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7

OUTPUT


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8

PROGRAM NO. 4Write a program to show a Grading system

importjava.util.*;

class Grade

{


{

System.out.println("Enter any number from 0 to 100 ");


inti;

i=cin.nextInt();

if(i>=81 && i=61 && i=41 && i=0 && i


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9

OUTPUT


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10

PROGRAM NO. 5Write a program to print a format using * in increasing order

class Star

{


{

inti,j;

for(i=1;i


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11

OUTPUT


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12

PROGRAM NO. 6Write a program to find out some of digits of any integer

number

importjava.util.*;

import java.io.*;

classSumDigitnew

{


{

Scanner cin=new Scanner(System.in)

int sum, i,a,d;

d=cin.nextInt();

a=Integer.parseInt(args[0]);

sum = 0;

for(i=1;i< =10;i++)

{

d=a%10;

a=a/10;

sum=sum+d;

}

System.out.println("Sum of Digit :"+sum);

}

}


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13

OUTPUT


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14

PROGRAM NO. 7Write a program to show the Multiplication table

importjava.util.*;

class Table

{

static public void main(String[] args)

{


System.out.println("please enter the number");

int n=cin.nextInt();

System.out.println("Multiplication table : ");

for(inti=1;i


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15

OUTPUT


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PROGRAM NO. 8Write a program to show Constructor Method

classRect

{

intlength,breadth;

publicRect() //Default Constructer

{

length=0 ; breadth=0 ;

System.out.println("Default constructer is fired");

}

publicRect(intl,int b) //Parametrised( Double Argumented) Constructer

{

int s;

length=l ; breadth=b ;

System.out.println("Parametrised( Double Argumented)Constructer is fired");

s=l+b;

System.out.println("sum="+s);

}


{

Rect r1=new Rect();

Rect r2=new Rect(6,7);

}

}


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17

OUTPUT


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18

PROGRAM NO. 9Write a program to show Method Overloading

classmethodOverloading

{

int add( inta,int b)

{

return(a+b);

}

float add(float a,float b)

{

return(a+b);

}

double add( int a, double b,double c)

{

return(a+b+c);}

}

classmainClass extends methodOverloading

{

public static void main( String arr[] )

{

mainClass temp = new mainClass();

System.out.println(temp.add(10,20));

System.out.println(temp.add(1.5f,2.3f));

System.out.println(temp.add(10,20.4,25.6));

}

}


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19

OUTPUT


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20

PROGRAM NO. 10Write a program to show Method Overriding

class A

{

public void Show()

{

System.out.println("A CAN DO HORSE RIDING BUT CANNOTRIDE A BIKE");

}

}

class B extends A

{

public void Show()

{

System.out.println("B CAN RIDE A BIKE BUT DOESNOTKNOW HORSE RIDING");

System.out.println("A class's show() method isoverridden by B class's show() method");

}

// Here the Show() method of parent class A is Overridden byShow() method of Child class B..

}

class Test

{


{

B obj=new B();

obj.Show();

}

}


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21

OUTPUT


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22

PROGRAM NO. 11Write a program to show Polymorphism using Inheritance

Polymorphism means the ability of a single variable of a given type to be used to referenceobjects ofdifferent types, and automatically call the method that is specific to the type ofobject the variable references. The benefit of polymorphism is that it is very easy to addnew classes of derived objects without breaking the calling code that uses the polymorphicclasses or interfaces. When you send a message to an object even though you dont knowwhat specific type it is, and the right thing happens, thats called polymorphism. The processused by object-oriented programming languages to implement polymorphism is calleddynamic binding. Polymorphism can be achieved by Method Overloading, MethodOverriding & Inheritance.Example :-

class A{

public void showA()

{

System.out.println("Class A is Shown");

}

}

class B extends A

{

public void showB()

{

System.out.println("Class B is Shown");

}

}

class C extends B

{

public void showC()

{

System.out.println("Class C is Shown");


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23

}

}

classTestABC

{


{

C obj=new C();

obj.showA();

obj.showB();

obj.showC();

}

}

Description of Program:-

We have created object of class C only but due to polymorphism we are able to refer toClass a and class B also i.e. If we derive many classes from a base class then we can refer toany class by creating object of Derived Class (Child class).


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24

OUTPUT


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PROGRAM NO. 12Write a program to show Inheritance

class Parent

{

public void Show()

{

inti=200000;

System.out.println("I HAVE 200000 RUPEES IN BANK

ACCOUNT");

}

}

class Child extends Parent

{

}

class Test

{


{

Child obj=new Child();

obj.Show();

System.out.println("child has takken parent'sproperties");

}

}


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27

PROGRAM NO. 13Write a program to show Swapping of two Strings

importjava.util.*;

class Swap

{

public static void main(String[] args)

{


String i;

System.out.println("Enter first String");

i=cin.nextLine();


String j;

System.out.println("Enter Second String");

j=cin1.nextLine();

System.out.println("\nBefore swapping\n");

System.out.println(" "+i+" "+j);

swap(i,j);

}


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28

static void swap(String i,String j)

{

String temp;

temp=i;

i=j;

j=temp;

System.out.println("\nAfter swapping\n");

System.out.println(" "+i+" "+j);

}

}


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29

Output


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30

PROGRAM NO. 14Write a program to show Multiplication of two Matrices

importjava.util.Scanner;

class Matrix

{


{

int m, n, p, q, sum = 0, c, d, k;

Scanner in = new Scanner(System.in);

System.out.println("Enter the number of rows and

columns of first matrix");

m = in.nextInt();

n = in.nextInt();

int first[][] = new int[m][n];

System.out.println("Enter the elements of first

matrix");

for ( c = 0 ; c < m ; c++ )

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

first[c][d] = in.nextInt();


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System.out.println("Enter the number of rows and

columns of second matrix");

p = in.nextInt();

q = in.nextInt();

if ( n != p )

System.out.println("Matrices with entered orders

can't be multiplied with each other.");

else

{

int second[][] = new int[p][q];

int multiply[][] = new int[m][q];

System.out.println("Enter the elements of

second matrix");

for ( c = 0 ; c < p ; c++ )

for ( d = 0 ; d < q ; d++ )

second[c][d] = in.nextInt();

for ( c = 0 ; c < m ; c++ )

{

for ( d = 0 ; d < q ; d++ )

{


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for ( k = 0 ; k < p ; k++ )

{

sum = sum +

first[c][k]*second[k][d];

}

multiply[c][d] = sum;

sum = 0;

}

}

System.out.println("Product of entered

matrices:-");

for ( c = 0 ; c < m ; c++ )

{

for ( d = 0 ; d < q ; d++ )

System.out.print(multiply[c][d]+"\t");

System.out.print("\n");

}

}

}

}


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33

OUTPUT


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PROGRAM NO. 15Show the Life Cycle of an Applet

importjava.applet.Applet;

importjava.awt.Graphics;

importjava.awt.*;

/*

* Applet can either run by browser or appletviewer application.

* Define tag within comments as given below to speed up

* the testing.

*/

public class AppletLifeCycleExample extends Applet

{

Label l1,l2,l3,l4,l5;

public void init()

{

super.init(); //init method is called first.

// It is used to initialize variables and called only once.

l1=new Label("INSIDE init()");

add(l1);

}

public void start()

{

super.start();

//start method is the second method to be called.

// start method is called every time the applet has been stopped.

l2=new Label("INSIDE Start()");

add(l2);


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}

public void stop()

{

super.stop();

//stop method is called when the the user navigates away from

// html page containing the applet.

l3=new Label("INSIDE stop()");

add(l3);

}

public void paint(Graphics g)

{

super.paint(g);

//paint method is called every time applet has to redraw its output.

l4=new Label("INSIDE paint()");

add(l4);

}

public void destroy()

{

super.destroy();

//destroy method is called when browser completely removes

//the applet from memeory. It should free any resources initialized

//during the init method.

}

}

Description

Each Java applet goes through a sequence of stages. They are created (initialized), displayed(painted),paused while off screen (stopped, started) and finally removed (destroyed) when

over.


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Initialization occurs when the applet is first loaded. Tasks performed here are creatingobjects, setting initial state, loading images, fonts, etc. and setting parameters. The methodused is init()

Display is how things are drawn on screen whether it is text, graphics or background.Redisplay occurs many time through the life of an applet. The method used is paint(Graphicsg).

Stopping occurs when one leaves a page that contains a running applet. Threads normallycontinue running but can be manually stopped. The method used is stop().

Starting occurs after initialization and after stops occur. Tasks include starting threads,sendingmessages to helper objects, or to tell the applet to start running. The method used isstart().

Destruction cleans up an applet before the browser exits. Tasks include thread stopping.Normally the method destroy() is not overridden.


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OUTPUT


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PROGRAM NO. 16Write a program to show a simple Applet

importjava.applet.*;

importjava.awt.*;

/**/

public class A extends Applet

{

Label lb;

public A()

{

lb=new Label("HELLO APPLET");

add(lb);

}

}


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OUTPUT

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