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8/6/2019 Term End Mon1

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VITU N I V E R S I T Y

(Estd. u/s 3 of UGC Act 1956)

Vellore - 632 014, Tamil Nadu, India

School of Information Technology and Engineering

Term-End Lab Examination

B.Tech (IT) - IV Semester

Subject:Programming in Java Lab

Duration: 2 hrs Max Marks:50

Program number 1JAVA 1

Write a java Applet program that allows you to enter any number of words in text area.The program should count the occurrences of every vowel in the text entered, when a

count button is clicked. The count should be displayed in individual text fields.

Count

Occurrences of:

A

E

I

O

U


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Program Number 2

Java

Write a Java Applet that allows you to enter marks and find average marks. "Separatingsymbol between marks" indicates the character that seperates marks entered in the

textarea.(67,78,90). "Auto-determine marks" is a way for the program to automaticallydetect how many marks have been entered.

Number of marks:

Auto-determine number of marks?

Separating symbol between marks:

Submit Query

Average of marks:


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Program Number 3

JAVA

Write a java program that counts the number of occurrences of a given word in a given

text passage.

Search for:

Case insensitive?Submit Query

Occurrences:


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Program Number 4

JAVA

Write a java program to implement the following.Create two threads MaxFinderThread, SortDescendThread for MainThread.The

MainThread populates an integer array with data. The SortDescendThread sorts the array

in descending order.MaxFinderThread finds the maximum element in the array using thevalue obtained after SortDescend Thread.See to that mutual exclusion is conformed.


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Program Number 5

Java

Write a java applet to implement the following.

What is your preferred server side coding language?

ASP / VB

Perl

PHP

java

Vote

Also include button result.When the result button is clicked,the result is displayed on

Textarea.


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JAVA

Given a classClass Student

{private int regno;

private string name;

private mark[];public Student () { }

public Student (int n) {}

public void get ();

}

Create the class in java.get 10 student objects.Write the student objects into filestud.dat and close the file. Open the file for reading, read the student objects, find the

total and average.display the student details along with total and average on to the screen.


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Write a Java Program to implement the following

Write characters (strictly alphabets) into a file old.txt.

Open file old.txt, read the file from backwards (usage of getFilePointer () is

must) offset the character read by 1. Store the contents into file new.txt. Read new.txt to get back the original content,i.e the content written in old.txt


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VITU N I V E R S I T Y(Estd. u/s 3 of UGC Act 1956)







JAVA

Create a applet that takes an expression in a text field.On clicking the calculate button

Computes the result of the expression and displays it in another textfield which is not

editable.

Example Text Field

Enter Your expression:2 + 3 * 9

Calculate

Result of your expression:45


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Program Number 8JAVA

The swipe card system produces a text file for each day of the week. It contains the name,

course and matriculation number of each student t hat has attended the lecture on that

day. (There is onlyone per day!). There are no duplicates. For example we might have thefile mon.txt with:

John

Computing123

Ken

Mathematics234

etc.

Develop a program that inputs data from each of the five files (mon.txt, tue.txt, wed.txt,

thurs.txt, fri.txt) and produces a report that shows:Each students details and the number of lectures attended during the week


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Program Number 9

Create a Two threads WriterThread,ReaderThread for the MainThread.TheWriterThreads writes the contents into a file and ReaderThread reads the contents from

the file.ReaderThread is made to wait until the writer writes contents into file.Mutual

Exclusion should strictly be enforced.


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Vellore - 632 014, Tamil Nadu, IndiaSchool of Information Technology and Engineering





Program Number 10

Create an applet that takes the contents as when it is entered in a text field, reverses thecontents and stores it in textarea.Implement appropriate listeners to listen to the

event.Include a clear button in applet to clear the text field and textarea.The textfield

should accept only alphabets.


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Program Number 11

Consider the following interface

interface train

{int firstclass=10;

int secondclass=10;

int RAC=5;int reserve(int type,int no_of_seats);

int cancel(int type,int no_of_seats);

}Write the definition of the class which has to implement the train interface. While

reserving adjust the number of seats for corresponding type if it has not reached

maximum limit, else put it in RAC and while cancelling increment the count of

RAC. Add necessary methods and variables in the class.


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Program Number 12

DrawaString(VITUNIVERSITY)inAppletwindowandmovetheStringfromtop

to bottomofthewindowcontinuously-useAppletclass.


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Subject:Programming in Java LabDuration: 2 hrs Max Marks:50

Program Number 13

Create an abstract class Bank that contains withdraw and deposit methods. Create

class savings account from Bank. Use a static variable annual_interest_rate to store

the annual interest rate for all account holders. Each object of the class contains a

private instance variable balance, account number and name of the customer. Provide

a method to calculate monthly interest. (Interest= balance*annual_interest_rate/12,

add this to balance.). Create a method to modify the annual_interest_rate. Create two

objects of savings account and call all the methods available in that class.


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Program Number 14

Create an interface for queue operations. Implement the interface as fixed queue andgrowable queue. Try to apply atleast one instance variable in the interface.


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Program Number 15

Implement the class hierarchy given below and use dynamic method dispatch to test theworking of all classes.

Shape

area( ) : double

perimeter():double

Rectangle

width,height: double

area( ) : double

perimeter( ) : double

Circle

radius : double

area( ) : doubleperimeter( ): double

diameter( ) : double

Square


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Program 16

Given a class definition

class Node{

int item;

Node next;

}

public class StackOfInts

{

private Node top;

public void push (int N)

public int pop ()

public boolean isEmpty () {

}An object of type Node holds one of the items in the linked list.

Top is the reference to the Node that is at the top ofthe stack. If top == null, then the

stack is empty.If the stack is empty throw an exception IlegalStateException, stating that

pop is not possible from an empty stack. Write a JAVA program to implement thefollowing.


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Program 17

A common programming task is computing statistics of a set of numbers. (A statisticis a number that summarizes some property of a set of data.) Common statistics

include the mean (also known as the average) and the standard deviation (which tells

how spread out the data is from the mean). Create a class called StatCalc that can be

used to compute these statistics, as well as the sum of the items in the dataset and the

number of items in the dataset.the StatCalc class has count ,sum ,numArr[] and

SquareSum as its data member If calc is a variable of type StatCalc, then the

following methods are defined:

o StatCalc(int size)

o

calc.enter (item);where item is a number, adds the item to the dataset.o calc.getCount () is a function that returns the number of items that have

been added to the dataset.

o calc.getSum () is a function that returns the sum of all the items that havebeen added to the dataset.

o calc.getMean () is a function that returns the average of all the items.

o calc.getStandardDeviation()

create a subclass StatCalc WithMinMax that has two datamembers max andmin.The class also has getMax() , getMin() to find the greatest and least of all

the numbers.use the constructor of base class to initialize the base class

members.Your program should have handled all exceptions.


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Program 18

Create a class Account with following attributes and methods :-owner , balance_amount,

init() , deposit(), withdraw() and print().The account has parameterized constructor toinitialize values apart from init().A specialist sub-class called GoldAccount.

This new type account permits the owner to withdraw money up to a credit limit and thus

have a negative balance. (The basic Account only allows the balance to drop to zero).

Note:-

a. The Gold Account class has a new attribute called creditLimit

b. The GoldAccount has a parameterized constructor to initialize the values (base

constructor should be called to initialize the inherited attributes.c. The GoldAccount has a new method called setCreditLimit ()

d. The GoldAccount has methods to override the withdraw () and print () methods

e. The GoldAccount inherits the attributes owner and balance from Account

f. The GoldAccount inherits methods initialise () and deposit () from Account

Create two instances of both Account and Goldaccount class each. Initialize the oneinstance using constructor and the other one using init ().Write a main program that does

all operations on both the classes. Throw appropriate exceptions wherever possible.


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Program 19

Design a check writing systems to prevent alteration of check amount. One common

security method requires that the check amount be written in numbers and spelled out in

words. Write a Java application to implement this system. (Example for 99678 ninetynine thousand six hundred and seventy eight only).[Use String or StringBuffer where

ever necessary.]


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Program 20Consider an object-oriented design for the following problem. You need to store

information for bank accounts. For purposes of the problem, assume that you only need

to store the current balance, and the total number of transactions for each account. The

goal for the problem is to avoid duplicating code between the three types of account. An

account needs to respond to the following methods:

i. Constructor or Init message

ii. Initialize a new account

iii. void Deposit(float amt)

- add the amt to the balance and increment the number of transactions

iv. void Withdraw(float amt)

- subtract the amt to the balance and increment the number of transactions

v. float Balance();

- return the current balance

There are three types of account: (Derive three classes from bank account)

Savings:: deposit and withdraw just affect the balance.

Recurring Deposit: No withdrawal in-between the fixed time. Makes compound interest

+ investment at the end stated period.

Loan Account: Initializes an account with a negative balance (Loan obtained.) and rate of

interest. No withdrawal allowed. Deposit at every month will go for interest (interest for

that months balance) and the balance is updated by reducing the remaining amount.


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Program 21

Java

Create a class below

Class Student

{private int regno;

private string name;

private mark [] ;( array of six)

public Student () { }public Student (int n) {}

public void get ();

}

Store the student objects in a vector.Display details about all the students by

iterating/enumerating through the vector. Delete information about students who havefailed in more than one subject.Display the information about 3 toppers. (Menu driven

program is must)

Documents

Term End Mon1