Key-Test-1 18SC2009 Object Oriented Programming

1. import java.util.Scanner;

//Recursive or Iterative methods

class Series_Demo

public static void main(String[] args)

System.out.println("Enter any positive integer :");

int n=new Scanner(System.in).nextInt();

new Series_Demo().sum(n);

new Series_Demo().sum1(n);

System.out.print("The Sum of Series for "+n+" eiements = "+new

void sum1(int n)

long sum=0;

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

sum+=(Math.pow(i,2));

}
 System.out.print("The Sum of Series for "+n+" eiements = "+sum);

long sum2(int n)

long sum=0;

if(n==1) return 1;

else return((long)(Math.pow(n,2))+sum2(n-1));

2. class Command_Demo

void display(long id,String name,String branch,short sec)

System.out.println("Student Id ="+id);

System.out.println("Student name ="+name);

System.out.println("Student branch ="+branch);

System.out.println("Student Section ="+sec);

public static void main(String[] args)

//long id= Long.parseLong(args[0]);

//String name=args[1];

//String branch=args[2];
 //short sec=Short.parseShort(args[3]);

Command_Demo oc=new Command_Demo();

oc.display(Long.parseLong(args[0]),args[1],args[2],Short.parseShort(args[3]));

3. If a class is final, it cannot be inherited. Methods become final but the instance Variables are not
final.

If a variable is final must be initialized at the time of declaration and cannot be modified.

If a method is final it cannot be overridden.

4. import java.util.Scanner;

class String_swapp

public static void main(String[] args)

{ Scanner sc=new Scanner(System.in);

System.out.print("Enter the first string to be swapped :");

String s1=sc.next();

System.out.print("Enter the first string to be swapped :");

String s2=sc.next();

System.out.print("\nStrings before swapping are string1="+s1+" and string2="+s2);

String_swapp.swap(s1,s2);

System.out.print("\nStrings after swapping are string1="+s1+" and string2="+s2);

static void swap(String s1,String s2)

String temp=s1;

s1=s2;

s2=temp;

5.

class Calculator

static int powerInt(int n1,int n2)

return ((int)Math.pow(n1,n2));

static double powerDouble(double n3,int n4)

return Math.pow(n3,n4);

class Calculate_Demo

public static void main(String[] args)

System.out.print("For Integers "+Calculator.powerInt(10,2));

System.out.print("\nFor Double "+Calculator.powerDouble(2.22,2));

}
}

6. import java.awt.Color;

import java.awt.Font;

import java.awt.*;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

class LoginForm2 extends JFrame {

JLabel l1, l2, l3;

JTextField tf1;

JButton btn1,btn2;

JPasswordField p1;

LoginForm2() {

JFrame frame = new JFrame("Employee Login Form");

l1 = new JLabel("");

l2 = new JLabel("Employee Id");

l3 = new JLabel("Password");

tf1 = new JTextField();

p1 = new JPasswordField();

btn1 = new JButton("Login");

l1.setBounds(100, 30, 400, 30);

l2.setBounds(80, 70, 200, 30);

l3.setBounds(80, 110, 200, 30);

tf1.setBounds(300, 70, 200, 30);

p1.setBounds(300, 110, 200, 30);

btn1.setBounds(150, 160, 100, 30);

btn2.setBounds(300, 160, 150, 30);

frame.add(l1);

frame.add(l2);

frame.add(tf1);

frame.add(l3);

frame.add(p1);

frame.add(btn1);

frame.add(btn2);

frame.setSize(400, 400);

frame.setLayout(null);

frame.setVisible(true);

public static void main(String[] args) {

new LoginForm2();

}
}

7. class Company

int cid;

String cname;

void custDetails(int cid,String cname)

{this.cid=cid;this.cname=cname;}

class Service

void display()

System.out.print(" The customer with id "+cid +" and name "+cname +" have
come for servicing");

Service os=new Service();

class Purchase

void display()

System.out.print(" The customer with id "+cid +" and name "+cname +" have
come for purchase");

Purchase op=new Purchase();

}
class Company_Demo

public static void main(String[] args)

Company oc=new Company();

oc.custDetails(1111,"Jack");

oc.os.display();

Company oc1=new Company();

oc1.custDetails(2222,"Peter");

oc1.op.display();

8. abstract class Shapes

public abstract void edges();

public abstract void faces();

public abstract void vertices();

class Cube extends Shapes

public void edges()

{
 System.out.print("edges-cube");

public void faces()

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

public void vertices()

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

class Triangle extends Shapes

public void edges()

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

public void faces()

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

public void vertices()

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

}
}

class Shapes_Demo

public static void main(String[] args)

Shapes os=new Cube();

os.edges();

os.faces();

os.vertices();

9. import java.lang.*;

import java.util.*;

class Book

private String title;

private String authorName;

private double price;

private int yearOfPublication;

public String getTitle() {

return title;

public void setTitle(String title) {

this.title = title;
 }

public String getAuthorName() {

return authorName;

public void setAuthorName(String authorName) {

this.authorName = authorName;

public double getPrice() {

return price;

public void setPrice(double price) {

this.price = price;

public int getYearOfPublication() {

return yearOfPublication;

public void setYearOfPublication(int yearOfPublication) {

this.yearOfPublication = yearOfPublication;

public class BookList

public static void main(String args[])

Scanner sc=new Scanner(System.in);

System.out.println("Enter how many book details you want to enter");

int n=sc.nextInt();

Book obj[]=new Book[n];

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

System.out.println("Enter Book" +i+"Details");

System.out.println("Enter Book Title");

obj[i].setTitle(sc.next());

System.out.println("Enter Book Author Name");

obj[i].setAuthorName(sc.next());

System.out.println("Enter Book Price");

obj[i].setPrice(sc.nextDouble());

System.out.println("Enter Year of Publication");

obj[i].setYearOfPublication(sc.nextInt());
 }

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

System.out.println("Book Details are");

System.out.println("Book " + (i+1) +" Title: " +obj[i].getTitle());

System.out.println("Book " + (i+1) +" Author Name: " +obj[i].getAuthorName());

System.out.println("Book " + (i+1) +" Price: " +obj[i].getPrice());

System.out.println("Book " + (i+1) +" Year of Publication: "

10. import java.util.Scanner;

public class Matrix {

Scanner sc;

int m1[][], m2[][], sum[][];

int row, column;

Matrix() {

sc = new Scanner(System.in);
System.out.println("\nEnter number of rows & columns");

row = sc.nextInt();

column = sc.nextInt();

m1 = new int[row][column];

m2 = new int[row][column];

sum = new int[row][column];

System.out.println("Enter the data for first matrix :");

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

m1[i][j] = sc.nextInt();

System.out.println("Enter the data for second matrix :");

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

void printMatrix() {

System.out.println("The First Matrix is :");

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

System.out.print("\t"+m1[i][j]);

System.out.println();

System.out.println("The Second Matrix is :");

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

System.out.print("\t"+m2[i][j]);
 }

System.out.println();

void addMatrix() {

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

sum[i][j] = m1[i][j] + m2[i][j];

System.out.println("The Sum is :");

for(int i=0; i<row; i++) {

for(int j=0; j<column; j++) {

System.out.print("\t"+sum[i][j]);

System.out.println();

}
 }

public static void main(String args[]) {

Matrix obj = new Matrix();

obj.printMatrix();

obj.addMatrix();

11. class Person

String name;

String gender;

int age;

Person()

name="ABCD";

gender="male";

age=23;

void show()

System.out.println("name="+name);

System.out.println("gender="+gender);
System.out.println("age="+age);

class Student extends Person

String classofstudy;

String collegename;

int yearofstudy;

Student(String costudy,String colname,int yostudy)

classofstudy=costudy;

collegename=colname;

yearofstudy=yostudy;

void display()

System.out.println("classofstudy="+classofstudy);

System.out.println("collegename="+collegename);

System.out.println("yearofstudy="+yearofstudy);

class Employee extends Person

String designation;

String compname;
int yearofexp;

Employee(String des,String coname,int yoexp)

designation=des;

compname=coname;

yearofexp=yoexp;

void disp()

System.out.println("designation="+designation);

System.out.println("compname="+compname);

System.out.println("yearofexp="+yearofexp);

class PersonDemo

public static void main(String args[])

Student s=new Student("s1","klef",2);

s.show();

s.display();

Employee e=new Employee("tester","ibm",10);

e.disp();

}
12. import java.lang.*;

import java.util.*;

class Account

long accNumber;

String accHolderName;

double balance;

public Account() {

this.accNumber = 0;

this.accHolderName = "abc";

this.balance = 0;

public Account(long accNumber, String accHolderName, double balance) {

this.accNumber = accNumber;

this.accHolderName = accHolderName;

this.balance = balance;

public long getAccNumber() {

return accNumber;

public void setAccNumber(long accNumber) {

this.accNumber = accNumber;

public String getAccHolderName() {

public void setAccHolderName(String accHolderName) {

this.accHolderName = accHolderName;

public double getBalance() {

return balance;

public void setBalance(double balance) {

this.balance = balance;

class SavingsAccount extends Account

void withdraw(double amount){

balance=balance-amount;

void deposit(double amount){

balance=balance+amount;

double balance(){

return balance;

}
class LoanAccount extends Account

double annualInterestRate;

LoanAccount()

annualInterestRate=8.5;

double getMonthlyInterestRate(){

return annualInterestRate/12.00;

double getMonthlyInterest(double principle_amount,int no_of_months){

return ((principle_amount*no_of_months*getMonthlyInterestRate())/100.00);

public class BankMain

public static void main(String args[])

SavingsAccount sa_obj= new SavingsAccount();

LoanAccount la_obj=new LoanAccount();

Scanner sc=new Scanner(System.in);

sa_obj.setAccNumber(sc.nextLong());

System.out.println("Enter Account Holder Name");

sa_obj.setAccHolderName(sc.next()+sc.nextLine());

System.out.println("Enter Balance");

sa_obj.setBalance(sc.nextDouble());

while(true)

System.out.println("Choose Option");

System.out.println("1. Withdraw");

System.out.println("2. Deposite");

System.out.println("3. Show Balance");

System.out.println("4. Take Loan");

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

int ch=sc.nextInt();

if(ch==1)

System.out.println("Enter Amount to Withdraw: ");

sa_obj.withdraw(sc.nextDouble());

else if(ch==2)

System.out.println("Enter Amount to Deposite: ");

else if(ch==3)

System.out.println("Your Balance is: " +sa_obj.balance());

else if(ch==4)

System.out.println("Enter Loan Amount: ");

double principle_amount=sc.nextDouble();

System.out.println("Enter No.of Months: ");

int no_of_months=sc.nextInt();

double monthly_intrest

monthly_intrest =la_obj.getMonthlyInterest(principle_amount,no_of_months);

System.out.println("Your Monthly Intrest is: "+ monthly_intrest);

else if(ch==5)

break;