java assigment

Java Assignment

Bhavin Modi Page 1

ASSIGMENT-1

//Write an Application program to print your name and

address.

class Ex1

public static void main(String args[])

System.out.println("Bhavin Modi");

System.out.print("Ankleshwar");

ASSIGMENT-2

Write an Application program to find two matrix

multiplication.

1 2 3 1 2 3 = 1 4 9

4 5 0 * 1 2 3 = 4 10 0

6 7 8 1 2 3 = 6 14 24.

Java Assignment

Bhavin Modi Page 2

import java.io.*;

class arr2mul

int i=0,j=0;

DataInputStream in = new

DataInputStream(System.in);

int n[][] = new int[3][3];

int m[][] = new int[3][3];

int mul[][] = new int[3][3];

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.print("Enter n[" + i + "][" + j + "]: ");

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Bhavin Modi Page 3

n[i][j] = Integer.parseInt(in.readLine());

System.out.println();

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.print("Enter m[" + i + "][" + j + "]: ");

m[i][j] = Integer.parseInt(in.readLine());

for(i=0;i<3;i++)

for(j=0;j<3;j++)

mul[i][j] = n[i][j] * m[i][j];

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Bhavin Modi Page 4

for(i=0;i<3;i++)

for(j=0;j<3;j++)

System.out.println(n[i][j] + " * " + m[i][j] + " = " +

mul[i][j]);

catch (Exception e){}

ASSIGMENT-3

Java Assignment

Bhavin Modi Page 5

Write an Application program to find area and

perimeter of a rectangle.

Note: define static methods.

Area Return l*b;

Perimeter Return 2*(l+b);

import java.io.*;

import java.lang.*;

class fun

static float area(float x,float y)

return (x * y);

static float perimeter(float x,float y)

return (2 * (x + y));

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Bhavin Modi Page 6

class rect

float l=0,b=0;

System.out.flush();

System.out.print("Enter Length: ");

l = Float.valueOf(in.readLine());

System.out.print("Enter Breadth: ");

b = Float.valueOf(in.readLine());

catch (Exception e)

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Bhavin Modi Page 7

System.out.print("IO Error");

System.out.println("Area of a rectangle = " +

fun.area(l,b));

System.out.println("Perimeter of a rectangle = " +

fun.perimeter(l,b));

ASSIGMENT-4

Write a program for Hardware company. Ask the user

to choose F for Floppy, C for CD, P for Pen drive.

Show the price of each item.

Show price of a hardware manufactured with the

chosen wood.

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Bhavin Modi Page 8

Floppy price is 15 Rs., CD price is 20 Rs and Pen drive

price is 1250 Rs.

The class name is Hardware.

class Hardware

char ch;

System.out.println("F for Floppy");

System.out.println("C for CD");

System.out.println("P for Pen Drive");

System.out.flush();

System.out.print("Select your choice: ");

switch(ch =(char)System.in.read())

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case 'F':

case 'f':

System.out.print("Floppy price is 15 Rs.");

break;

case 'C':

case 'c':

System.out.print("CD price is 20 Rs.");

break;

case 'P':

case 'p':

System.out.print("Pen Drive price is 1250

Rs.");

break;

default:

System.out.print("Wrong choice");

catch (Exception e)

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Bhavin Modi Page 10

System.out.print("I/O Error");

ASSIGMENT-5

Write a menu driven an Application program.

1.Check for positive or negative number

2.Check for odd or even number

3.Check for primary number

4.Check for Palindrome number

5.Check for Armstrong number

6.Check for number whether a member of fibonacci

series

7.Exit

Create abstract methods for every check into abstract

Proto1 class and

define into Defi1 class and call from Menu1 class.

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Bhavin Modi Page 11

import java.io.*;

abstract class Proto1

abstract void disp();

abstract void pn(int x);

abstract void oe(int x);

abstract void prime(int x);

// abstract void palin(int x);

abstract void arms(int x);

abstract void fibo(int x);

abstract void exit();

class Defi1 extends Proto1

int n = 0;

void disp()

System.out.println("1.Check for positive or

negative number ");

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System.out.println("2.Check for odd or even

number");

System.out.println("3.Check for primary number");

System.out.println("4.Check for Palindrome

number");

System.out.println("5.Check for Armstrong

number");

System.out.println("6.Check for number whether a

member of fibonacci series ");

System.out.println("7.Exit");

void pn(int x)

n = x;

if ( n > 0)

System.out.print("Number is Positive");

System.out.print("Number is Negative");

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void oe(int x)

n = x;

if ((n%2) == 1)

System.out.print("Number is Odd");

System.out.print("Number is Even");

void prime(int x)

int i=0,c=0;

n = x;

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

if (n%i == 0)

if (c==0)

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System.out.print("primary no is " + n);

System.out.print("Not primary no");

void arms(int x)

n = x;

int a,b,c,sum=0;

a = n/100;

b = (n-(a*100))/10;

c = (n-(a*100))-(b*10);

sum = (a*a*a) + (b*b*b) + (c*c*c);

if (sum == n)

System.out.print("Armstrong no is " + sum);

System.out.print("Not Armstrong no");

Java Assignment

Bhavin Modi Page 15

void fibo(int x)

n = x;

int n1=1,n2=0,sum=0;

System.out.print("Fibonacci series is ");

while(n>0)

sum = n1+n2;

if (x==sum)

System.out.print("fibo");

n1 = n2;

n2 = sum;

System.out.print(sum + " ");

void exit()

System.out.print("Exit");

Java Assignment

Bhavin Modi Page 16

class Menu1

public static void main(String args[]) throws

IOException

Defi1 d1=new Defi1();

String s = new String();

d1.disp();

int ch = Integer.parseInt(in.readLine());

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System.out.print("Enter Number: ");

int n = Integer.parseInt(in.readLine());

switch(ch)

case 1:

d1.pn(n);

break;

case 2:

d1.oe(n);

break;

case 3:

d1.prime(n);

break;

case 5:

d1.arms(n);

break;

case 6:

d1.fibo(n);

break;

case 7:

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d1.exit();

break;

default:

catch (Exception e)

System.out.print("\t\tDo want to Continue (y/n)?:

s = in.readLine();

}while ((s.charAt(0) == 'Y') || (s.charAt(0) == 'y'));

ASSIGMENT-6

Java Assignment

Bhavin Modi Page 19

Create an abstract class Auto with fields for the car

maker and price.

Include get and set methods for these fields;

the setPrice() method is an abstract.

Create two subclasses for individual automobile

makers and

include appropriate setPrice() methods in each

subclass.

Finally, write a program that uses the Auto class and

subclasses

to display information about different cars.

import java.io.*;

abstract class Auto

abstract void setprice(int x);

class maruti extends Auto

void get()

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Bhavin Modi Page 20

System.out.println("Car Maker is Maruti");

void setprice(int x)

System.out.println("Car Price is " + x);

class honda extends Auto

void get()

System.out.println("Car Maker is Honda");

void setprice(int x)

System.out.println("Car Price is " + x);

Java Assignment

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class car

Exception

System.out.print("Enter Car Price: ");

int cp = Integer.parseInt(in.readLine());

maruti m = new maruti();

m.get();

m.setprice(cp);

honda h = new honda();

h.get();

h.setprice(cp);

ASSIGNMENT-7

Java Assignment

Bhavin Modi Page 22

Create a class named Square that contains data fields

for height, width,

and surfaceArea, and a method named

computeSurfaceArea().

Create child class Cube.

Cube contains an additional data field named depth,

and a computeSurfaceArea() method that overrides

the parent method.

Write a program that instantiate a Square object and

a Cube object and

display the surface areas of the objects.

import java.io.*;

class square

int height=0,width=0,surfaceArea=0;

square(int x,int y)

height=x;

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width=y;

int sfa()

surfaceArea=height * width;

return surfaceArea;

class Cube extends square

int depth=0;

Cube(int x,int y,int z)

super(x,y);

depth=z;

int sfa()

return (height * width * depth);

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class surfacearea

int h=0,w=0,d=0;

System.out.print("Enter height: ");

h = Integer.parseInt(in.readLine());

System.out.print("Enter width: ");

w = Integer.parseInt(in.readLine());

System.out.print("Enter depth: ");

d = Integer.parseInt(in.readLine());

Java Assignment

Bhavin Modi Page 25

square s = new square(h,w);

Cube c = new Cube(h,w,d);

System.out.println("Square SurfaceArea is " +

s.sfa());

System.out.println("Cube SurfaceArea is " + c.sfa());

ASSIGNMENT-8

Write a simple java program that give the list of valid

and invalid numbers

using command line arguments.

Input : 112 java 23.2 3434

Output: valid numbers:2 invalid numbers :2

class cmdvi

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int invalid=0,valid=0,n;

for(int i=0;i<args.length;i++)

n = Integer.parseInt(args[i]);

catch(Exception e)

invalid++;

continue;

valid++;

System.out.println("Valid Number: " + valid);

System.out.println("Invalid Number: " + invalid);

ASSIGNMENT-9

Java Assignment

Bhavin Modi Page 27

Create 1integer array of size 10 and initialize the

array with some values.

Write a program to arrange the entire array into its

ascending order and

display the sorted array.

import java.io.*;

class ascending

int i=0,j=0,swap=0;

int n[] = new int[10];

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for(i=0;i<10;i++)

System.out.print("Enter n[" + i + "]: ");

n[i] = Integer.parseInt(in.readLine());

for(i=0;i<10;i++)

for(j=0;j<10;j++)

if (n[i] < n[j])

swap = n[i];

n[i] = n[j];

n[j] = swap;

System.out.print("Ascending order is ");

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for(i=0;i<10;i++)

System.out.print(n[i] + " ");

ASSIGNMENT-10

Write an Application program to find matrix

multiplication table

for example.

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

1 | 1 2 3

2 | 2 4 6

3 | 3 6 9

Note: use command-line arguments(R C)

Java Assignment

Bhavin Modi Page 30

class multitable

int i=0,j=0;

int r[] = new int[3];

int c[] = new int[3];

int m[][] = new int[3][3];

for(i=0;i<3;i++)

r[i]=Integer.parseInt(args[i]);

for(j=0;i<6;i++,j++)

c[j]=Integer.parseInt(args[i]);

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for(i=0;i<3;i++)

for(j=0;j<3;j++)

m[i][j] = r[i] * c[j];

System.out.print(" ");

for(i=0;i<3;i++)

System.out.print(r[i] + " ");

System.out.print(" ------");

for(i=0;i<3;i++)

System.out.print(c[i] + "| ");

for(j=0;j<3;j++)

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System.out.print(m[i][j] + " ");

ASSIGNMENT-11

Write menu driven an Application program for

following string manipulation.

Reverse a string.

Sorting (using a string)

Conversion from upper to lower and vice-versa.

import java.io.*;

import java.lang.*;

class fun

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String s,s1 = new String();

int i,j;

char temp;

void rev(String s)

System.out.print("Reverse String is ");

for(i=s.length()-1;i>=0;i--)

System.out.print(s.charAt(i));

void sort(String s)

char s2[] = new char[s.length()];

System.out.print("Sorted String is ");

for(i=0;i<s.length();i++)

Java Assignment

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s2[i] = s.charAt(i);

for(i=0;i<s.length();i++)

for(j=i+1;j<s.length();j++)

if(s2[j].compareTo(s2[i]) < 0)

temp = s2[i];

s2[i] = s2[j];

s2[j] = temp;

System.out.print(s2);

void uc(String s)

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System.out.println("Upper String is " +

s.toUpperCase());

void lc(String s)

System.out.println("Lower String is " +

s.toLowerCase());

void exit()

System.out.println("Exit");

class strfun

IOException

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int ch;

fun f = new fun();

System.out.println("1.Reverse a string");

System.out.println("2.Sorting a string");

System.out.println("3.Conversion from upper to

lower");

System.out.println("4.Conversion from lower to

upper");

System.out.println("5.Exit");

System.out.flush();

ch = Integer.parseInt(in.readLine());

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System.out.print("Enter String: ");

s = in.readLine();

switch(ch)

case 1:

f.rev(s);

break;

case 2:

f.sort(s);

break;

case 3:

f.lc(s);

break;

case 4:

f.uc(s);

break;

case 5:

f.exit();

break;

default:

Java Assignment

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catch (Exception e)

ASSIGNMENT-12

You are given a sting str ="sardar patel university".

Perform the following operation on it.

a. find the length of string

b. replace the character p' by 'r'

c. convert all character in uppercase

extract and print "sardar" from given string.

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import java.io.*;

import java.lang.*;

class fun

String s = new String("sardar patel university");

void len()

System.out.print("Length of String is " +

s.length());

void rep()

System.out.print("Replaced String is " +

s.replace('p','r'));

void uc()

Java Assignment

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System.out.println("Upper String is " +

s.toUpperCase());

void ext()

System.out.println("Extract String is " +

s.substring(0,6));

void exit()

System.out.println("Exit");

class strfun

IOException

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fun f = new fun();

System.out.println("a. find the length of string");

System.out.println("b. replace the character p' by

'r'");

System.out.println("c. convert all character in

uppercase");

System.out.println("d. extract and print " + '\"' +

"sardar" + '\"' + " from given string.");

System.out.println("e. Exit");

char ch;

switch(ch = (char) System.in.read())

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case 'a':

f.len();

break;

case 'b':

f.rep();

break;

case 'c':

f.uc();

break;

case 'd':

f.ext();

break;

case 'e':

f.exit();

break;

default:

Java Assignment

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catch (Exception e)

ASSIGNMENT-13

Write an Application program that search through its

command-line arguments

if an argument is found that does not begin with an

Uppercase letter

display an error message and terminate.

class search

int c = args[0].length(),n;

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String str = args[0];

char ch;

for( int i=0;i<c;i++)

ch = str.charAt(i);

if (ch >= 65 && ch <= 90)

break;

System.out.print (ch);

catch(Exception e)

System.out.print("IO Error");

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Bhavin Modi Page 45

ASSIGNMENT-14

Write an Application program to find maximum

number from two numbers of

any data type using command-line arguments.Note:

Using the concept of method overloading.

class fun

void max(int a,int b)

if(a>b)

System.out.println(a+ " is greater");

System.out.println(b+ " is greater");

void max(double a,double b)

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if(a>b)

System.out.println(a+ " is greater");

System.out.println(b+ " is greater");

void max(char a,char b)

if(a>b)

System.out.println("\'"+a+"\'"+ " is greater");

System.out.println("\'"+b+"\'"+ " is greater");

class cmdmax

fun f = new fun();

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if(args[0].indexOf('.')>=0 &&

args[0].indexOf('.')<=32000)

double t=Double.parseDouble(args[0]);

double t1=Double.parseDouble(args[1]);

f.max(t,t1);

int s=Integer.parseInt(args[0]);

int s1=Integer.parseInt(args[1]);

f.max(s,s1);

catch(NumberFormatException e)

char c=args[0].charAt(0);

char c2=args[1].charAt(0);

f.max(c,c2);

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ASSIGNMENT-15

Write an Application program and create one class

that accepts

an array of ten numbers

create one subclass which has following,

- Display numbers entered

- Sum of the numbers

- Average of numbers

- Maximum of numbers

- Minimum of numbers

- Exit

Create appropriate methods in the subclass to execute

operation

as per our choice.

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Note: use super keyword.

import java.io.*;

class operation

IOException

System.out.println("1. Display numbers entered");

System.out.println("2. Sum of the numbers");

System.out.println("3. Average of numbers");

System.out.println("4. Maximum of numbers");

System.out.println("5. Minimum of numbers");

System.out.println("6. Exit");

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System.out.print("Enter Choice: ");

fun f = new fun();

switch(ch)

case 1:

f.disp();

break;

case 2:

f.sum();

break;

case 3:

f.avg();

break;

case 4:

f.max();

break;

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case 5:

f.min();

break;

case 6:

f.exit();

break;

default:

class read

int a[] = new int[10];

read()

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for(int i=0;i<10;i++)

System.out.print("Enter a[" + (i+1) + "]: ");

a[i] = Integer.parseInt(in.readLine());

catch(Exception e){}

class fun extends read

super();

int s=0;

void disp()

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System.out.print("Array is ");

for (int i=0;i<10;i++)

System.out.print(a[i] + " ");

void sum()

s += a[i];

System.out.print("Sum of Array is " + s);

void avg()

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s += a[i];

System.out.print("Average of Array is " + (s/10));

void max()

int m = a[0];

if (m < a[i])

m = a[i];

System.out.print("Maximum Value of Array is " +

void min()

int m = a[9];

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if (m > a[i])

m = a[i];

System.out.print("Minimum Value of Array is " +

void exit()

System.out.print("Exit");

ASSIGNMENT-16

5 candidates contest an election.

The candidates are numbered 1 to 5 and making the

candidate number on

the ballot paper does the voting.

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Write a program to read the ballots and count the

votes cast candidate

using an array variable count.

In case, a number read is outside the range 1 to 5,

the ballot should be considered as a 'spoilt ballot' and

the program should also count the number of spoilt

ballots.

import java.io.*;

class election

IOException

int i,n,count=0,spoilt=0;

System.out.print("Enter number of ballots: ");

n = Integer.parseInt(in.readLine());

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int a[] = new int[n];

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

System.out.print("Enter Vote: ");

a[i] = Integer.parseInt(in.readLine());

if( a[i] == 1 || a[i] == 2 || a[i] == 3 || a[i] == 4

|| a[i] == 5)

count++;

System.out.println("\t\tOutside the range");

spoilt++;

System.out.println("bollte paper: " + count);

System.out.println("spoilt parep: " + spoilt);

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ASSIENMENT-17

Write an application program to count occurrence of

particular

character in entered String.

import java.io.*;

import java.lang.*;

class count

IOException

char ch;

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int c=0;

System.out.print("Enter String: ");

s = in.readLine();

System.out.print("Enter Character: ");

ch = (char) System.in.read();

for(int i=0;i<s.length();i++)

if (ch == s.charAt(i))

System.out.println("occurrence of character is " +

ASSIGNMENT-18(1)

import java.io.*;

Java Assignment

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import java.lang.*;

class info

int no;

String name;

void getdata(int n,String nm)

no = n;

name = nm;

void display()

System.out.println("Student No: " + no );

System.out.println("Student Name: " + name);

class stud

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IOException

int std_no;

String std_name;

info st[] = new info[10];

System.out.print("Student No: ");

std_no = Integer.parseInt(in.readLine());

System.out.print("Student Name: ");

std_name = in.readLine();

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st[i] = new info();

st[i].getdata(std_no,std_name);

st[i].display();

ASSIGNMENT-18(2)

Write a menu driven an Application program to do

following.

Member variable:

std_no,std_name,std_sub1,std_sub2,std_sub3,total,per

1. New Student Entry

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2. Calculate student result

3. Display specified student's formatted Mark sheet

4. Delete Student Entry

5. Modify the Student info

6. Exit

Note: use array of objects and read appropriate value

on choice.

import java.io.*;

import java.lang.*;

class info

int no,sub1,sub2,sub3;

float total,per;

String name;

void data(int n,String s,int s1,int s2,int s3)

no = n;

name = s;

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sub1 = s1;

sub2 = s2;

sub3 = s3;

System.out.print("New Entry");

void result(int n)

if(no == n)

total = sub1 + sub2 + sub3;

per = total / 3;

System.out.print("Result calculated");

System.out.print("std_no not exist");

void display(int n)

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if ( no == n)

System.out.println("Student No: " + no);

System.out.println("---------------------------");

System.out.println("Student Subject1: " + sub1);

System.out.println("---------------------------");

System.out.println("total: " + total);

System.out.println("per: " + per);

void del(int n)

if(no == n)

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no = '\0';

System.out.print("Entry Deleted");

class student

IOException

int std_no,std_sub1,std_sub2,std_sub3;

String std_name;

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int c = 0,i,j;

System.out.println("1. New Student Entry");

System.out.println("2. Calculate student result");

System.out.println("3. Display specified student's

formatted Mark sheet");

System.out.println("4. Delete Student Entry");

System.out.println("5. Modify the Student info");

System.out.println("6. Exit");

System.out.print("Enter Choice: ");

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switch(ch)

case 1:

System.out.print("Student Subject1: ");

std_sub1 = Integer.parseInt(in.readLine());

st[c] = new info();

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st[c].data(std_no,std_name,std_sub1,std_sub2,std_sub3)

break;

case 2:

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

st[i].result(std_no);

break;

case 3:

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

st[i].display(std_no);

break;

case 4:

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

st[i].del(std_no);

break;

default:

Java Assignment

Bhavin Modi Page 71

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

System.out.print("\t\tDo want to Continue

(y/n)?: ");

s = in.readLine();

class info

int no;

String name;

void getdata(int n,String nm)

no = n;

name = nm;

Java Assignment

Bhavin Modi Page 72

void display()

System.out.println("Student No: " + no );

class stud

IOException

int std_no;

String std_name;

Java Assignment

Bhavin Modi Page 73

st[i] = new info();

st[i].getdata(std_no,std_name);

st[i].display();

Java Assignment

Bhavin Modi Page 74

ASSIGNMENT-19

Define a class baby with the following attributes.

1. xname

2. date of birth

3. date on which beg injection has to be given (60 days

from date of birth)

4. xdate on which polio drops is to be given (45 days

from date of birth)

Write a constructor to construct the babyobject y.

The constructor must find out bcg and polio drops

dates from the date of birth.

In the main program define a baby and display its

details.

import java.io.*;

class babyobject

Java Assignment

Bhavin Modi Page 75

int d,m,y,beg,polio;

String xname = new String();

babyobject()

System.out.print("Enter Name: ");

xname = in.readLine();

System.out.println("Date of birth");

System.out.print("Enter Day: ");

d = Integer.parseInt(in.readLine());

System.out.print("Enter Month: ");

m = Integer.parseInt(in.readLine());

System.out.print("Enter Year: ");

Java Assignment

Bhavin Modi Page 76

y = Integer.parseInt(in.readLine());

beg = d + 60 ;

polio = d + 45;

if ( (beg >= 30) || (polio >= 30))

m = m + 1;

if(m == 2 && y%4 == 0)

beg = beg - 28;

polio = polio - 28;

m = m + 1;

beg = beg - 30;

polio = polio - 30;

Java Assignment

Bhavin Modi Page 77

if ( (beg >= 30) || (polio >= 30))

beg = (beg - d) - 30;

polio = polio - d;

if (m >= 12)

m = 1;

y = y + 1;

System.out.println("date on " + beg + "/" + m + "/" +

y + " beg injection has to be given");

System.out.println("date on " + polio + "/"+ m + "/"

+ y + " polio drops is to be given");

class baby

Java Assignment

Bhavin Modi Page 78

babyobject y = new babyobject();

ASSIGNMENT-20

Write an Application program to generate Employee

Payslip.

Create following classes.

Employee - emp_no,emp_name,basic ,Des

InvalidBasicException - Class for user defined

Exception

(if basic is negative or non numeric).

Payslip - do all additions (da, hra) And

deductions (loan_ins , gpr)

If basic<=5000 Then

hra=5% of basic and da=3% of basic.

Java Assignment

Bhavin Modi Page 79

If basic>=15000 Then

hra=7.5% of basic and da=5% of basic

hra=10% of basic and da=8% of basic.

Based on that calculate netpay for each employee in

Payslip class and

generate the formatted pay slip.

Note: emp_no should be generated automatically

with prefix EMP,

use array of objects.

import java.io.*;

class employee

IOException

Java Assignment

Bhavin Modi Page 80

int emp_no[] = new int[100];

String emp_name[] = new String[100];

float basic[] = new float[100];

String Des[] = new String[100];

int c = 0,i,j;

Payslip p = new Payslip();

System.out.print("emp_no: ");

emp_no[c] = Integer.parseInt(in.readLine());

System.out.print("emp_name: ");

Java Assignment

Bhavin Modi Page 81

emp_name[c] = in.readLine();

System.out.print("basic: ");

basic[c] = Integer.parseInt(in.readLine());

System.out.print("Des: ");

Des[c] = in.readLine();

s = in.readLine();

System.out.print("emp_no: ");

Java Assignment

Bhavin Modi Page 82

j = Integer.parseInt(in.readLine());

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

if( emp_no[i] == j)

System.out.println("emp_no: EMP" +

emp_no[i]);

System.out.println("emp_name: " +

emp_name[i]);

System.out.println(" basic: " + basic[i]);

p.netpay(basic[i]);

System.out.println("Des: " + Des[i]);

System.out.println("emp_no not found");

Java Assignment

Bhavin Modi Page 83

s = in.readLine();

class Payslip

void netpay(float x)

float basic,da,hra,net;

basic = x;

if (basic <= 5000)

hra = (basic * 5)/100;

da = (basic * 3)/100;

Java Assignment

Bhavin Modi Page 84

else if (basic >= 15000)

hra = (basic * 75)/1000;

da = (basic * 5)/100;

hra = (basic * 10)/100;

da= (basic * 8)/100;

System.out.println(" hra: " + hra);

System.out.println(" da: " + da);

System.out.println("netpay: " + (basic + hra +

//return (basic + hra + da);

ASSIGNMENT-21

Java Assignment

Bhavin Modi Page 85

Write a simple java program that will catch exception

using multiple catch.

import java.lang.*;

class mulce

int a[] = {5,10};

int b = 5;

int x = a[2] / b - a[1];

// catch (Exception e)

// System.out.print("IOException");

catch (ArithmeticException e)

Java Assignment

Bhavin Modi Page 86

System.out.print("Division by Zero");

catch (ArrayIndexOutOfBoundsException e)

System.out.print("Array index error");

int y = a[1] /a[0];

System.out.print("y = " + y);

ASSIGNMENT-22

Write a program that displays an invoice of several

items.

It should contain the item name, quantity, price, and

total cost on each

line for the quantity and item cost.

Java Assignment

Bhavin Modi Page 87

Use two classes. The first class contains the item data

and methods

to get an set the item name, quantity and price.

The other class creates objects for the items and

uses the objects

to call the set and get methods.

import java.io.*;

import java.lang.*;

class item

IOException

String name = new String();

int quantity = 0;

float price = 0.0f;

invoice i = new invoice();

Java Assignment

Bhavin Modi Page 88

System.out.print("Item Name : ");

name = in.readLine();

System.out.print("Quantity : ");

quantity = Integer.parseInt(in.readLine());

System.out.print("Price : ");

price = Float.valueOf(in.readLine()).floatValue();

i.get(name,quantity,price);

i.set();

class invoice

String n = new String();

int q;

float p,tc;

void get(String x, int y, float z)

n = x;

q = y;

p = z;

Java Assignment

Bhavin Modi Page 89

void set()

System.out.println("Item Name : " + n);

System.out.println("Quantity : " + q);

System.out.println("Price : " + p);

System.out.println("Total Cost: " + (q*p));

ASSIGNMENT-23

Design a class to represent a library account.

Include the following members :

Data members:

name, number, total no of books

Java Assignment

Bhavin Modi Page 90

Methods:

To assign an initial values.

To display total no of issue books and returned

books.

To display the name and date of issue of the book.

import java.io.*;

class book

String no = new String();

int tno;

void get(String x, String y, int z)

no = x;

s = y;

tno = z;

void display()

Java Assignment

Bhavin Modi Page 91

System.out.println("Book Number: " + no);

System.out.println("Book Name : " + s);

// System.out.println("Book date : " +

class library

IOException

String bname = new String();

String bno = new String();

int btno;

book b = new book();

System.out.print("Book Number: ");

bno = in.readLine();

System.out.print("Book Name : ");

bname = in.readLine();

Java Assignment

Bhavin Modi Page 92

System.out.print("Total no of Books: ");

btno = Integer.parseInt(in.readLine());

b.get(bno,bname,btno);

b.display();

ASSIGNMENT-24

Write a program that defines circle class with two

constructors.

The first form accepts a double value that represents

radius of circle.

This constructor assumes that circle is centered at the

origin.

The second form accepts three double values.

The first two arguments define co-ordinates of center.

And third value defines radius.

Java Assignment

Bhavin Modi Page 93

class circle

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

IOException

second s = new second(1.5,2.5,3.5);

s.disp();

class first

double x,y;

first(double a, double b)

x = a;

y = b;

void disp()

System.out.print(x + y);

Java Assignment

Bhavin Modi Page 94

class second extends first

double z;

second(double a,double b,double c)

super(a,b);

z = c;

void disp()

System.out.print(z);

ASSIGNMENT-25

Java Assignment

Bhavin Modi Page 95

Create a class called Time having data member hh,

mm,ss.

Write an Application program that will add the data of

two objects and

store the answer in third object and display .

import java.io.*;

class Time

IOException

int hh[] = new int[2];

int mm[] = new int[2];

int ss[] = new int[2];

int i,h=0,m=0,s=0;

for(i=0;i<2;i++)

System.out.print("Enter Hour: ");

Java Assignment

Bhavin Modi Page 96

hh[i] = Integer.parseInt(in.readLine());

System.out.print("Enter Minite: ");

mm[i] = Integer.parseInt(in.readLine());

System.out.print("Enter Second: ");

ss[i] = Integer.parseInt(in.readLine());

for(i=0;i<2;i++)

h += hh[i];

m += mm[i];

s += ss[i];

if (m>60)

if (s>60)

Java Assignment

Bhavin Modi Page 97

if (h>24)

System.out.print("Date: " + h + ":" + m + ":" + s);

ASSIGNMENT-26

Write an application program to show the use of

interface.

interface newshape

void draw();

Java Assignment

Bhavin Modi Page 98

class circle implements newshape

public void draw()

int radius = 12;

System.out.print("Radius of circle is " + radius);

class shape

newshape nc = new circle();

nc.draw();

ASSIGNMENT-27

Write an application program that read the contents of

one file and copy

Java Assignment

Bhavin Modi Page 99

it to the other file. (DataInputStream and

DataOutputStream class).

import java.io.*;

class DIOS

IOException

File primitive = new File ("prim.dat");

FileOutputStream fos = new FileOutputStream

(primitive);

DataOutputStream dos = new DataOutputStream

(fos);

dos.writeInt(1999);

dos.writeDouble(375.85);

dos.writeBoolean(false);

dos.writeChar('X');

Java Assignment

Bhavin Modi Page 100

dos.close();

fos.close();

FileInputStream fis = new FileInputStream

(primitive);

DataInputStream dis = new DataInputStream (fis);

System.out.println(dis.readInt());

System.out.println(dis.readDouble());

System.out.println(dis.readBoolean());

System.out.println(dis.readChar());

dis.close();

fis.close();

ASSIGNMENT-29

import java.applet.*;

import java.awt.*;

Java Assignment

</applet>

public class display extends Applet

public void paint(Graphics g)

g.drawString("Hello World",10,100);

ASSIGNMENT-30

import java.awt.*;

import java.awt.event.*;

</applet>

Java Assignment

public class Mouse extends Applet implements

MouseMotionListener

String msg=" ";

int mouseX = 0 , mouseY = 0;

public void init()

setBackground(Color.yellow);

setForeground(Color.blue);

addMouseMotionListener(this);

public void mouseDragged(MouseEvent me)

mouseX = me.getX();

mouseY = me.getY();

msg = "JAVA";

Java Assignment

showStatus("Dragging mouse at " + mouseX + ", "

+ mouseY);

repaint();

public void mouseMoved(MouseEvent me)

showStatus("Moving mouse at " + me.getX() + ", " +

me.getY());

public void paint (Graphics g)

g.drawString(msg,mouseX,mouseY);

ASSIGNMENT-31

import java.awt.*;

Java Assignment

/* <applet code="operator" width=400 height=200>

</applet> */

public class operator extends Applet implements

ActionListener

String msg=" ",m;

int a,b,ans;

TextField n1,n2,r;

Choice op;

Button ok;

public void init()

setBackground(Color.yellow);

setForeground(Color.red);

Label fno = new Label(" First No:");

Label sno = new Label("Second No:");

Java Assignment

Label res = new Label("Result:");

n1 = new TextField(10);

n2 = new TextField(10);

r = new TextField(10);

op = new Choice();

add(fno);

add(n1);

add(sno);

add(n2);

op.add("+");

op.add("-");

op.add("*");

op.add("/");

add(op);

add(res);

add(r);

Java Assignment

ok = new Button("OK");

add(ok);

ok.addActionListener(this);

public void actionPerformed(ActionEvent ae)

String str = ae.getActionCommand();

a = Integer.parseInt(n1.getText());

b = Integer.parseInt(n2.getText());

m = op.getSelectedItem();

if (str.equals("OK"))

if (m == "+")

ans = a + b;

else if (m == "-")

ans = a - b;

Java Assignment

else if (m == "*")

ans = a * b;

else if (m == "/")

ans = a / b;

repaint();

r.setText(ans+"");

ASSIGNMENT-32(1)

import java.util.*;

class calendardemo

Java Assignment

String months[] =

{"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep",

"Oct","Nov","Dec"};

Calendar calendar = Calendar.getInstance();

Date date =new Date();

System.out.print("Date:" + date);

System.out.println("\nTime:" +

calendar.get(Calendar.HOUR));

// System.out.print("Date:" +

months[calendar.get(Calendar.MONTH)] + " " +

calendar.get(Calendar.DATE) + " " +

calendar.get(Calendar.YEAR));

// System.out.println("Time:" +

calendar.get(Calendar.HOUR) + ":" +

calendar.get(Calendar.MINUTE) + ":" +

calendar.get(Calendar.SECOND));

Java Assignment

ASSIGNMENT-32(2)

/* Write An Applet Program That Accept Date And

Display It. */

import java.awt.*;

/* <applet code="date" width = 200 height = 200>

</applet> */

public class date extends Applet implements

ActionListener

Label l1;

TextField t1;

public void init()

l1 = new Label("Enter Date:");

Java Assignment

t1 = new TextField(10);

add(l1);

add(t1);

t1.addActionListener(this);

repaint();

g.drawString("Date:" + t1.getText(),10,100);

ASSIGNMENT-33

import java.awt.*;

Java Assignment

</applet>

public class good extends Applet

g.drawString('Time()',10,100);

ASSIGNMENT-34

/* Write An Applet Program To Create Registration

Form For

Your Mail Account And Register It. */

import java.awt.*;

Java Assignment

/* <applet code="email" width=400 height=400>

</applet> */

public class email extends Applet implements

ActionListener

Label l1,l2;

TextField t1,t2;

public void init()

l1 = new Label("Email ID:");

l2 = new Label("Password:");

t2.setEchoChar('*');

add(l1);

add(t1);

add(l2);

add(t2);

Java Assignment

t2.addActionListener(this);

repaint();

g.drawString("Email ID: " + t1.getText(),10,100);

g.drawString("Password: " + t2.getText(),10,150);

ASSIGNMENT-37

/* Write an Applet program to convert money for the

local currency

(selected Country) into U.S. Dollar.*/

import java.awt.*;

Java Assignment

/* <applet code="money" width=400 height=400>

</applet> */

public class money extends Applet implements

ActionListener, ItemListener

Label l1,l2;

TextField t1,t2;

Choice cty;

String msg= "";

int m1,m2;

public void init()

l1 = new Label("Enter money to convert:");

l2 = new Label("Currency in Dollar:");

Java Assignment

cty = new Choice();

cty.add("U.S.");

cty.add("U.K.");

cty.add("Ausralia");

add(l1);

add(t1);

add(cty);

add(l2);

add(t2);

cty.addItemListener(this);

repaint();

public void itemStateChanged(ItemEvent ie)

Java Assignment

msg = cty.getSelectedItem();

m1 = Integer.parseInt(t1.getText());

if (msg == "U.S.")

m2 = m1 * 37;

else if(msg == "U.K.")

m2 = m1 * 36;

else if(msg == "Ausralia")

m2 = m1 * 35;

m2 = 0;

repaint();

// g.drawString("money : " + t1.getText(),10,100);

// g.drawString("dollar: " + t2.getText(),10,150);

t2.setText(String.valueOf(m2));

ASSIGNMENT-38

Java Assignment

Develop an applet that performs the following

operations:

a.when button is pressed, the word "down" is

displays the

current coordinates of the mouse

b.when button is released, the word "up" is

displays the

current coordinates of the mouse

c.when button is clicked, the message is "mouse is

clicked" is shown.

import java.awt.*;

</applet>

Java Assignment

public class buttonevent extends Applet implements

MouseListener

String msg=" ";

Button click;

public void init()

// setBackground(Color.blue);

// setForeground(Color.red);

click = new Button("CLICK");

add(click);

addMouseListener(this);

/* public void mouseClicked(MouseEvent me)

msg = "mouse clicked";

Java Assignment

repaint();

public void mousePressed(MouseEvent me)

msg = "mouse down";

repaint();

public void mouseReleased(MouseEvent me)

msg = "mouse up";

repaint();

g.drawString(msg,10,100);

Java Assignment

ASSIGNMENT-39

import java.awt.*;

/* <applet code="bgcolor" width=200 height=200>

</applet> */

public class bgcolor extends Applet implements

ItemListener

String msg=" ";

Choice c;

public void init()

c = new Choice();

c.add("Red");

c.add("Green");

Java Assignment

c.add("Blue");

add(c);

c.addItemListener(this);

repaint();

msg = c.getSelectedItem();

if (msg == "Red")

setBackground(Color.red);

if (msg == "Green")

setBackground(Color.green);

Java Assignment

if (msg == "Blue")

setBackground(Color.blue);

ASSIGNMENT-40

/* Write An Applet Program To Write User Note On

Canvas. */

import java.awt.*;

/* <applet code="note" width=400 height=400>

</applet> */

public class note extends Applet implements

KeyListener

Java Assignment

String msg ="";

public void init()

addKeyListener(this);

public void keyPressed(KeyEvent ke)

showStatus("Key Down");

public void keyReleased(KeyEvent ke)

showStatus("Key Up");

public void keyTyped(KeyEvent ke)

msg += ke.getKeyChar();

repaint();

Java Assignment

ASSIGNMENT-41

import java.awt.*;

/* <applet code="copy" width=200 height=200>

</applet> */

public class copy extends Applet implements

ItemListener, ActionListener

String msg=" ";

Checkbox m,l,p;

TextField ch;

public void init()

// setBackground(Color.green);

Java Assignment

CheckboxGroup cbg = new CheckboxGroup();

m = new Checkbox("Music",cbg,true);

l = new Checkbox("Listening",cbg,false);

p = new Checkbox("Painting",cbg,false);

add(m);

add(l);

add(p);

m.addItemListener(this);

l.addItemListener(this);

p.addItemListener(this);

ch = new TextField(12);

add(ch);

ch.addActionListener(this);

Java Assignment

repaint();

// msg = "" + m.getState();

// g.drawString(msg,10,100);

ch.setText(cbg.getSelectedCheckboxGroup().getLabel());

// g.drawString("Name: " + ch.getText(),10,100);

Java Assignment

ASSIGNMENT-42

import java.awt.*;

/* <applet code="select" width=200 height=200>

</applet> */

public class select extends Applet implements

ItemListener

String msg=" ";

Checkbox m,f;

public void init()

setBackground(Color.cyan);

setForeground(Color.red);

Java Assignment

m = new Checkbox("Male",cbg,true);

f = new Checkbox("Female",cbg,false);

add(m);

add(f);

m.addItemListener(this);

f.addItemListener(this);

repaint();

msg = "Male " + m.getState();

Java Assignment

msg = "Female " + f.getState();

ASSIGNMENT-43

import java.awt.*;

/* <applet code="controls" width=300 height=400>

</applet> */

public class controls extends Applet implements

String msg=" ";

TextField no = new TextField(10);

TextField nm = new TextField(10);

TextField ad = new TextField(10);

Java Assignment

TextField pc = new TextField(10);

TextArea text = new TextArea(msg,10,30);

public void init()

// setBackground(Color.yellow);

Label sno = new Label("Sno");

Label snm = new Label("Snm");

Label add = new Label("Address");

Label pin = new Label("PinCode");

Label city = new Label("City");

Label state = new Label("State");

Label gen = new Label("Gender");

Label area = new Label("Area of int.");

Choice c = new Choice();

c.add("Anand");

c.add("Nadiad");

Java Assignment

c.add("Baroda");

Choice s = new Choice();

s.add("Gujarat");

s.add("Dehli");

s.add("MP");

Checkbox m = new Checkbox("Male",cbg,true);

Checkbox f = new Checkbox("Female",cbg,false);

Checkbox com = new Checkbox("Comput");

Checkbox eng = new Checkbox("Enginee");

Button store = new Button("Store");

add(sno);

add(no);

add(snm);

add(nm);

Java Assignment

add(add);

add(ad);

add(pin);

add(pc);

add(city);

add(c);

add(state);

add(s);

add(gen);

add(m);

add(f);

add(area);

add(com);

add(eng);

add(store);

add(text);

store.addActionListener(this);

Java Assignment

if (str.equals("Store"))

msg = "You pressed";

repaint();

text.setText("Sno: " + no.getText() + "\nSnm: " +

nm.getText() + "\nAddress: " + ad.getText() +

"\nPincode: " + pc.getText());

Java Assignment

ASSIGNMENT-44

import java.awt.*;

/* <applet code="controls" width=300 height=400>

</applet> */

public class controls extends Applet implements

String msg=" ";

TextField no = new TextField(10);

TextField nm = new TextField(10);

TextField ad = new TextField(10);

TextField pc = new TextField(10);

TextArea text = new TextArea(msg,10,30);

Java Assignment

public void init()

// setBackground(Color.yellow);

Label sno = new Label("Sno");

Label snm = new Label("Snm");

Label add = new Label("Address");

Label pin = new Label("PinCode");

Label city = new Label("City");

Label state = new Label("State");

Label gen = new Label("Gender");

Label area = new Label("Area of int.");

Choice c = new Choice();

c.add("Anand");

c.add("Nadiad");

c.add("Baroda");

Choice s = new Choice();

s.add("Gujarat");

Java Assignment

s.add("Dehli");

s.add("MP");

Checkbox m = new Checkbox("Male",cbg,true);

Checkbox f = new Checkbox("Female",cbg,false);

Checkbox com = new Checkbox("Comput");

Checkbox eng = new Checkbox("Enginee");

Button store = new Button("Store");

add(sno);

add(no);

add(snm);

add(nm);

add(add);

add(ad);

add(pin);

add(pc);

Java Assignment

add(city);

add(c);

add(state);

add(s);

add(gen);

add(m);

add(f);

add(area);

add(com);

add(eng);

add(store);

add(text);

store.addActionListener(this);

if (str.equals("Store"))

msg = "You pressed";

Java Assignment

repaint();

text.setText("Sno: " + no.getText() + "\nSnm: " +

nm.getText() + "\nAddress: " + ad.getText() +

"\nPincode: " + pc.getText());

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