shanmugasundari.files.wordpress.com · Web viewExp. No. 1. Develop a Java application to generate...

CS8383 OBJECT ORIENTED PROGRAMMING LAB

Exp. No. 1. Develop a Java application to generate Electricity bill. Create a class with the following members: Consumer no., consumer name, previous month reading, current month reading, type of EB connection (i.e domestic or commercial). Compute the bill amount using the following tariff.

If the type of the EB connection is domestic, calculate the amount to be paid as follows:

· First 100 units - Rs. 1 per unit

· 101-200 units - Rs. 2.50 per unit

· 201 -500 units - Rs. 4 per unit

· 501 units - Rs. 6 per unit

If the type of the EB connection is commercial, calculate the amount to be paid as follows:

· First 100 units - Rs. 2 per unit

· 101-200 units - Rs. 4.50 per unit

· 201 -500 units - Rs. 6 per unit

· 501 units - Rs. 7 per unit

PROGRAM

import java.util.*;

class ElectricityBill

{

int cno;

String cname;

int pr;

int cr;

String atype;

int reading;

double bamount;

public ElectricityBill(int no, String name,int prev, int cur,String acc)

{

this.cno=no;

this.cname=name;

this.pr=prev;

this.cr=cur;

this.atype=acc;

}

public void calculate()

{

reading=cr-pr;

if(atype.compareToIgnoreCase("domestic")==0)

{

if(reading<=100)

bamount=reading*1.0;

if(reading>100 && reading<=200)

bamount=100+((reading-100)*2.50);


bamount=100+250 + (reading-200)*4;

if(reading>500)

bamount=100+250+ 1200+(reading-500)*6;

}

else if(atype.compareToIgnoreCase("commercial")==0)

{

if(reading<=100)

bamount=reading*2.0;


bamount=200+((reading-100)*4.50);


bamount=200+450 + (reading-200)*6;

if(reading>500)

bamount=200+450 +1800+(reading-500)*7;

}

else

{

System.out.println("Invalid Customer Type");

System.exit(0);

}

}

public void displaybill()

{

System.out.println("\t\t Electricity Bill \n");

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

System.out.println("customer Name :"+cname);

System.out.println("Customer Number :"+cno);

System.out.println("Customer Type :"+atype);

System.out.println("Total Reading :"+reading);

System.out.println("Total Amount : Rs."+bamount);

}

}

public class EBBill

{

public static void main(String ss[])

{int no=0;

String name=" ";

int prev=0;

int cur=0;

String type=" ";

try

{

Scanner s= new Scanner(System.in);

System.out.println("Enter the Customer No\t");

no=s.nextInt();

System.out.println("Enter the Customer Name\t");

name=s.next();

System.out.println("Previous Month Reading\t");

prev=s.nextInt();

System.out.println("Current Month Reading\t");

cur=s.nextInt();

System.out.println("Account Type\t");

type=s.next();

}

catch(Exception ee)

{

System.out.println("Read Error");

}

ElectricityBill eb=new ElectricityBill(no,name,prev,cur,type);

eb.calculate();

eb.displaybill();

}

}

OUTPUT

G:\R17OOPSLAB\progs>java EBBill

Enter the Customer No

1

Enter the Customer Name

sivakumar

Previous Month Reading

200

Current Month Reading

280

Account Type

domestic

Electricity Bill

________________

customer Name :sivakumar

Customer Number :1

Customer Type :domestic

Total Reading :80

Total Amount : Rs.80.0



1


siva


200


450

Account Type

domestic

Electricity Bill

________________

customer Name :siva

Customer Number :1

Customer Type :domestic

Total Reading :250


G:\R17OOPSLAB\progs>



1


siva


200


450

Account Type

commercial

Electricity Bill

________________

customer Name :siva

Customer Number :1

Customer Type :commercial

Total Reading :250




1


siva


200


312

Account Type

jfdlj

Invalid Customer Tpe


Exp. No. 2. Develop a java application to implement currency converter (Dollar to INR, EURO to INR, Yen to INR and vice versa), distance converter (meter to KM, miles to KM and vice versa) , time converter (hours to minutes, seconds and vice versa) using packages.

PROGRAM

package myconverter;

import java.text.*;

class INRtoDOLLAR

{

double value;

public INRtoDOLLAR(double inr)

{

value=inr;

}

public double convert()

{

return value/68.25;

}

}

class DOLLARtoINR

{

double value;

public DOLLARtoINR(double inr)

{

value=inr;

}


{

return value*68.25;

}

}

class INRtoEURO

{

double value;

public INRtoEURO(double inr)

{

value=inr;

}


{

return value/80.1;

}

}

class EUROtoINR

{

double value;

public EUROtoINR(double inr)

{

value=inr;

}


{

return value*80.10;

}

}

class INRtoYEN

{

double value;

public INRtoYEN(double inr)

{

value=inr;

}


{

return value/1.92;

}

}

class YENtoINR

{

double value;

public YENtoINR(double inr)

{

value=inr;

}


{

return value*1.92;

}

}

class MILEtoKM

{

double value;

public MILEtoKM(double inr)

{

value=inr;

}


{

return value*1.60;

}

}

class KMtoMILE

{

double value;

public KMtoMILE(double inr)

{

value=inr;

}


{

return value/1.60;

}

}

class HOURStoMINUTES

{

double value;

public HOURStoMINUTES(double inr)

{

value=inr;

}


{

return value*60.0;

}

}

class MINUTEStoHOURS

{

double value;

public MINUTEStoHOURS(double inr)

{

value=inr;

}


{

return value/60.0;

}

}

class HOURStoSECONDS

{

double value;

public HOURStoSECONDS(double inr)

{

value=inr;

}


{

return value*3600.0;

}

}

class SECONDStoHOURS

{

double value;

public SECONDStoHOURS(double inr)

{

value=inr;

}


{

return value/3600.0;

}

}

import myconverter.*;

class Convert

{

public static void main(String str[])

{

int r=500,d=54,y=350,e=250,h=2,m=324,s=1200,mile=7,km=270;

INRtoDOLLAR obj1=new INRtoDOLLAR(r);

System.out.println("The Rs. "+r+" = USD "+obj1.convert());

DOLLARtoINR obj2= new DOLLARtoINR(d);

System.out.println("The USD "+d+" = Rs."+obj2.convert());

INRtoEURO obj3=new INRtoEURO(r);

System.out.println("The Rs. "+r+" = EURO "+obj3.convert());

EUROtoINR obj4= new EUROtoINR(e);

System.out.println("The EURO "+e+" = Rs."+obj4.convert());

INRtoYEN obj5=new INRtoYEN(r);

System.out.println("The Rs. "+r+" = YEN "+obj5.convert());

YENtoINR obj6= new YENtoINR(y);

System.out.println("The YEN "+y+" = Rs."+obj6.convert());

MILEtoKM obj7=new MILEtoKM(mile);

System.out.println("The "+mile+"Mile = "+obj7.convert()+" KM");

KMtoMILE obj8=new KMtoMILE(km);

System.out.println("The "+km+" KM = "+obj8.convert()+" Mile");

HOURStoMINUTES obj9=new HOURStoMINUTES(h);

System.out.println(h+" Hours = "+obj9.convert()+" Minutes");

MINUTEStoHOURS obj10=new MINUTEStoHOURS(m);

System.out.println(m+" Minutes = "+obj10.convert()+" Hours");

HOURStoSECONDS obj11=new HOURStoSECONDS(h);

System.out.println(h+" Hours = "+obj11.convert()+" Seconcds");

SECONDStoHOURS obj12=new SECONDStoHOURS(s);

System.out.println(s+" Seconds = "+obj10.convert()+" Hours");

}

}

OUTPUT

G:\R17OOPSLAB\progs>javac Convert.java

G:\R17OOPSLAB\progs>java Convert

The Rs. 500 = USD 7.326007326007326

The USD 54 = Rs.3685.5

The Rs. 500 = EURO 6.242197253433209

The EURO 250 = Rs.20025.0

The Rs. 500 = YEN 260.4166666666667

The YEN 350 = Rs.672.0

The 7Mile = 11.200000000000001 KM

The 270 KM = 168.75 Mile

2 Hours = 120.0 Minutes

324 Minutes = 5.4 Hours

2 Hours = 7200.0 Seconcds

1200 Seconds = 5.4 Hours


Exp. No. 3. Develop a java application with Employee class with Emp_name, Emp_id, Address, Mail_id, Mobile_no as members. Inherit the classes, Programmer, Assistant Professor, Associate Professor and Professor from employee class. Add Basic Pay (BP) as the member of all the inherited classes with 97% of BP as DA, 10 % of BP as HRA, 12% of BP as PF, 0.1% of BP for staff club fund. Generate pay slips for the employees with their gross and net salary.

PROGRAM

import java.io.*;

import java.util.*;

class Employee

{

String ename;

int eid;

String eaddr;

String email;

String emobile;

public void getempdata()

{

Scanner sc= new Scanner(System.in);

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

try

{

System.out.println("Enter Employee Name ");

ename=br.readLine();

System.out.println("Enter Employee Id ");

eid=sc.nextInt();

System.out.println("Enter Address of Employee ");

eaddr=br.readLine();

System.out.println("Enter E-Mail Id ");

email=br.readLine();

System.out.println("Enter Mobile Nummber ");

emobile=br.readLine();

}

catch(IOException ie)

{

System.out.println(ie);

}

}

}

class Programmer extends Employee

{

int bpay;

double hra;

double da;

double pf;

double sclub;

double gross;

double net;

public Programmer(int pay)

{

bpay=pay;

}


{

da=bpay*.97;

hra=bpay*.10;

pf=bpay*.12;

sclub=bpay*.01;

gross=bpay+da+hra;

net=gross-(pf+sclub);

}


{

System.out.println("Employee Name : "+ename);

System.out.println("Employee Id : "+eid);

System.out.println("Address of Employee :"+eaddr);

System.out.println("E-Mail Id "+email);

System.out.println("Mobile Nummber "+emobile);

System.out.println("Basic Pay : "+bpay);

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

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

System.out.println("PF: "+pf);

System.out.println("Staff Club : "+sclub);

System.out.println("Gross Pay : "+gross);

System.out.println("Net Pay : "+net);

}

}

class AssistantProfessor extends Employee

{

int bpay;

double hra;

double da;

double pf;

double sclub;

double gross;

double net;

public AssistantProfessor(int pay)

{

bpay=pay;

}


{

da=bpay*.97;

hra=bpay*.10;

pf=bpay*.12;

sclub=bpay*.01;

gross=bpay+da+hra;


}


{













}

}

class AssociateProfessor extends Employee

{

int bpay;

double hra;

double da;

double pf;

double sclub;

double gross;

double net;

public AssociateProfessor(int pay)

{

bpay=pay;

}


{

da=bpay*.97;

hra=bpay*.10;

pf=bpay*.12;

sclub=bpay*.01;

gross=bpay+da+hra;


}


{













}

}

class Professor extends Employee

{

int bpay;

double hra;

double da;

double pf;

double sclub;

double gross;

double net;

public Professor(int pay)

{

bpay=pay;

}


{

da=bpay*.97;

hra=bpay*.10;

pf=bpay*.12;

sclub=bpay*.01;

gross=bpay+da+hra;


}


{













}

}

class Inherit2

{


{

Programmer pr=new Programmer(6000);

AssistantProfessor ap=new AssistantProfessor(16500);

AssociateProfessor asp=new AssociateProfessor(34500);

Professor p= new Professor(36000);

System.out.println("Pay Bill for Programmer ");

pr.getempdata();

pr.calculate();

pr.displaybill();

System.out.println("Pay Bill for Assistant Professor ");

ap.getempdata();

ap.calculate();

ap.displaybill();

System.out.println("Pay Bill for Associate Professor ");

asp.getempdata();

asp.calculate();

asp.displaybill();

System.out.println("Pay Bill for Professor ");

p.getempdata();

p.calculate();

p.displaybill();

}

}

OUTPUT

G:\R17OOPSLAB\progs>java Inherit2

Pay Bill for Programmer

Enter Employee Name

SIVAKUMAR

Enter Employee Id

1

Enter Address of Employee

PERUNDURAI

Enter E-Mail Id

[email protected]

Enter Mobile Nummber

9994244540

Employee Name : SIVAKUMAR

Employee Id : 1

Address of Employee :PERUNDURAI

E-Mail Id [email protected]

Mobile Nummber 9994244540

Basic Pay : 6000

HRA : 600.0

DA : 5820.0

PF: 720.0

Staff Club : 60.0

Gross Pay : 12420.0

Net Pay : 11640.0

Pay Bill for Assistant Professor

Enter Employee Name

SENTHILKUMAR

Enter Employee Id

2


CHENNAI

Enter E-Mail Id

[email protected]


9994244541

Employee Name : SENTHILKUMAR

Employee Id : 2

Address of Employee :CHENNAI



Basic Pay : 16500

HRA : 1650.0

DA : 16005.0

PF: 1980.0

Staff Club : 165.0

Gross Pay : 34155.0

Net Pay : 32010.0

Pay Bill for Associate Professor

Enter Employee Name

KANNAN

Enter Employee Id

3


ERODE

Enter E-Mail Id

[email protected]


9994244542

Employee Name : KANNAN

Employee Id : 3

Address of Employee :ERODE



Basic Pay : 34500

HRA : 3450.0

DA : 33465.0

PF: 4140.0

Staff Club : 345.0

Gross Pay : 71415.0

Net Pay : 66930.0

Pay Bill for Professor

Enter Employee Name

MURALI

Enter Employee Id

4


SALEM

Enter E-Mail Id

[email protected]


9994244543

Employee Name : MURALI

Employee Id : 4

Address of Employee :SALEM



Basic Pay : 36000

HRA : 3600.0

DA : 34920.0

PF: 4320.0

Staff Club : 360.0

Gross Pay : 74520.0

Net Pay : 69840.0


Exp. No. 4. Design a Java interface for ADT Stack. Implement this interface using array. Provide necessary exception handling in both the implementations.

PROGRAM

interface StackI {

void push(int item) throws StackOverflow;

int pop() throws StackUnderflow;

boolean isEmpty();

}

class StackOverflow extends Exception

{

String msg=" ";

public StackOverflow(String title)

{

this.msg=title;

}

public String toString()

{

return "StackError:"+msg;

}

}

class StackUnderflow extends Exception

{

String msg=" ";

public StackUnderflow(String title)

{

this.msg=title;

}


{

return "StackError:"+msg;

}

}

class StackImpl implements StackI {

private int stck[];

private int tos;

StackImpl(int size)

{

stck = new int[size];

tos = -1;

}

public void push(int item) throws StackOverflow

{

if(tos==stck.length-1) // use length member

throw new StackOverflow("Stack Overflow");

else

{

stck[++tos] = item;

System.out.println("Item " + item+" Pushed");

}

}

public int pop() throws StackUnderflow

{

if(tos < 0)

throw new StackUnderflow("Stack underflow.");

else

return stck[tos--];

}

public boolean isEmpty()

{

if(tos<0)

return true;

else

return false;

}

}

class StackTest {

public static void main(String args[]) {

StackImpl mystack1 = new StackImpl(5);

StackImpl mystack2 = new StackImpl(8);

// push some numbers onto the stack

try

{

System.out.println("Capacity of Stack1 is 5 ");

for(int i=0; i<5; i++) mystack1.push(i);

System.out.println("Capacity of Stack2 is 8 ");

for(int i=0; i<9; i++) mystack2.push(i);

}

catch(StackOverflow sov)

{

System.out.println(sov);

}

// pop those numbers off the stack

try

{

System.out.println("Items in mystack1:");

for(int i=0; i<5; i++)

System.out.println(mystack1.pop());

System.out.println("Items in mystack2:");

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

System.out.println(mystack2.pop());

}

catch(StackUnderflow suf)

{

System.out.println(suf);

}

if(mystack1.isEmpty())

System.out.println("The stack1 is empty");

if(mystack2.isEmpty())

System.out.println("The stack2 is empty");

}

}

OUTPUT

G:\R17OOPSLAB\progs>java StackTest

Capacity of Stack1 is 5

Item 0 Pushed

Item 1 Pushed

Item 2 Pushed

Item 3 Pushed

Item 4 Pushed

Capacity of Stack2 is 8

Item 0 Pushed

Item 1 Pushed

Item 2 Pushed

Item 3 Pushed

Item 4 Pushed

Item 5 Pushed

Item 6 Pushed

Item 7 Pushed

StackError:Stack Overflow

Items in mystack1:

4

3

2

1

0

Items in mystack2:

7

6

5

4

3

2

1

0

StackError:Stack underflow.

The stack1 is empty

The stack2 is empty


Exp. No. 5. Write a program to perform string operations using ArrayList. Write functions for the following

a. Append - add at end

b. Insert – add at particular index

c. Search

d. List all string starts with given letter

PROGRAM

import java.io.*;

import java.util.*;

class StringOp

{

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

{

int ch=0;

String str=null;

ArrayList al= new ArrayList();

do

{

System.out.println("String Operations using ArrayList");

System.out.println("1. Append - add at end ");

System.out.println("2. Insert at particular index");

System.out.println("3. Search");

System.out.println("4. List all string starts with given letter");

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

System.out.println("Enter your Choice :");

Scanner sc= new Scanner(System.in);

ch=sc.nextInt();

switch(ch)

{

case 1:

try

{

System.out.println("Enter the String to be appended at end :");

BufferedReader br= new BufferedReader(new InputStreamReader(System.in));

str=br.readLine();

}


{


}

al.add(str);

System.out.println("Item Added at the end");

break;

case 2:

System.out.println("Enter the Position: ");

try

{

Scanner sc1= new Scanner(System.in);

int p=sc1.nextInt();

System.out.println("Enter the String to be inserted :");


str=br.readLine();

al.add(p,str);

System.out.println("Item inserted at the position "+p);

}


{


}

break;

case 3:

boolean res=false;

System.out.println("Enter the item to search ;");

try

{


str=br.readLine();

for(String obj:al)

{

if(obj.equals(str))

{

res=true;

break;

}

}

if(res)

System.out.println("Item found ");

else

System.out.println("Item Not found ");

}


{


}

break;

case 4:

System.out.println("The elements of array list are ");

System.out.println(al);

break;

}

}while (ch>0 && ch<5);

}

}

OUTPUT

G:\R17OOPSLAB\progs>javac StringOp.java

G:\R17OOPSLAB\progs>java StringOp

String Operations using ArrayList

1. Append - add at end

2. Insert at particular index

3. Search

4. List all string starts with given letter

5. Exit

Enter your Choice :

1

Enter the String to be appended at end :

siva

Item Added at the end




3. Search


5. Exit

Enter your Choice :

1


senthil





3. Search


5. Exit

Enter your Choice :

1


kannan





3. Search


5. Exit

Enter your Choice :

2

Enter the Position:

1

Enter the String to be inserted :

murugan

Item inserted at the position 1




3. Search


5. Exit

Enter your Choice :

4

The elements of array list are

[siva, murugan, senthil, kannan]




3. Search


5. Exit

Enter your Choice :

3

Enter the item to search ;

senthil

Item found




3. Search


5. Exit

Enter your Choice :

3

Enter the item to search ;

arun

Item Not found




3. Search


5. Exit

Enter your Choice :

5


Exp. No.6. Write a Java Program to create an abstract class named Shape that contains two integers and an empty method named print Area(). Provide three classes named Rectangle, Triangle and Circle such that each one of the classes extends the class Shape. Each one of the classes contains only the method print Area () that prints the area of the given shape.

PROGRAM

abstract class Shape

{

int no1,no2;

public abstract void printArea();

}

class Rectangle extends Shape

{

public Rectangle(int h,int w)

{

no1=h;

no2=w;

}

public void printArea()

{

System.out.println("Area of Rectangle is "+ (no1*no2));

}

}

class Circle extends Shape

{

public Circle(int r)

{

no1=r;

}


{

System.out.println("Area of Circle is "+ (3.14*no1*no1));

}

}

class Triangle extends Shape

{

public Triangle(int b,int h)

{

no1=b;

no2=h;

}


{

System.out.println("Area of Triangle is "+ (no1*no2)/2);

}

}

class Inherit1

{


{

Rectangle r= new Rectangle(3,4);

r.printArea();

Circle c= new Circle(5);

c.printArea();

Triangle t= new Triangle(3,4);

t.printArea();

}

}

OUTPUT

G:\R17OOPSLAB\progs>java Inherit1

Area of Rectangle is 12

Area of Circle is 78.5

Area of Triangle is 6

Exp. No. 7. Write a Java program to implement user defined exception handling.

PROGRAM

import java.io.*;

class MobileNumberException extends Exception

{

String str;

public MobileNumberException(String test)

{

str=test;

}


{

return "MobileNumberException : The Mobile Number has only "+str.length()+" digits / Contains Characters";

}

}

class MobileExp

{


{

String num=null;

try

{


System.out.println("Enter the Mobile Number ");

num=br.readLine();

}


{

System.out.println("IO Error " +ie);

}

try

{

if(num.length()==10 && num.matches("[0-9]+"))

System.out.println("Correct Mobile Number");

else

throw new MobileNumberException(num);

}

catch(MobileNumberException me)

{

System.out.println(me);

}

}

}

OUTPUT

G:\R17OOPSLAB\progs>javac MobileExp.java

G:\R17OOPSLAB\progs>java MobileExp

Enter the Mobile Number

9994244540

Correct Mobile Number



9382

MobileNumberException : The Mobile Number has only 4 digits / Contains Characters



abdef

MobileNumberException : The Mobile Number has only 5 digits / Contains Characters


Exp. No. 8. Write a Java program that reads a file name from the user, displays information about whether the file exists, whether the file is readable, or writable, the type of file and the length of the file in bytes.

PROGRAM

import java.io.*;

import java.util.*;

class FileDetails

{


{

String fname=null;

try

{


System.out.println("Enter File Name ");

fname=br.readLine();

}


{

System.out.println("IO Error " +ie);

}

File f= new File(fname);

if(f.exists())

System.out.println("File Exists");

else

System.out.println("File Not Available");

if(f.canWrite())

System.out.println("File has Write Permission");

if(f.canRead())

System.out.println("File has Read Permission");

if(f.canExecute())

System.out.println("File has Execute Permission");

System.out.println("File size is :"+f.length());

System.out.println("Last Modified Date :"+new Date(f.lastModified()));

}

}

OUTPUT

G:\R17OOPSLAB\progs>javac FileDetails.java

G:\R17OOPSLAB\progs>java FileDetails

Enter File Name

EBBill.java

File Exists

File has Write Permission

File has Read Permission

File has Execute Permission

File size is :2046

Last Modified Date :Mon Jun 18 19:45:59 IST 2018


Exp. No. 9. Write a java program that implements a multi-threaded application that has three threads. First thread generates a random integer every 1 second and if the value is even, second thread computes the square of the number and prints. If the value is odd, the third thread will print the value of cube of the number.

PROGRAM

import java.util.*;

class SquareThread extends Thread

{

public int n;

public SquareThread(int no)

{

this.n = no;

System.out.println("Square Thread Started");

start();

}

public void run()

{

System.out.println("The Square of the Random Number " + n + " is "+(n*n));

}

}

class CubeThread extends Thread

{

public int n;

public CubeThread(int no)

{

this.n = no;

System.out.println("Cube Thread Started");

start();

}

public void run()

{

System.out.println("The Cube of the Random Number " + n + " is "+(n*n*n));

}

}

class RandThread extends Thread

{

public RandThread()

{

start();

}

public void run()

{

int v = 0;

Random r = new Random();

try

{

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

{

v = r.nextInt(100);

System.out.println("Generated Random Number is " + v);

if (v % 2 == 0)

new SquareThread(v);

else

new CubeThread(v);

Thread.sleep(1000);

}

}

catch (InterruptedException e)

{

System.out.println("Randon Number Thread Interrupted");

}

}

}

public class MultiThreadDemo

{

public static void main(String[] args)

{

RandThread r = new RandThread();

}

}

OUTPUT

G:\R17OOPSLAB\progs>java MultiThreadDemo

Generated Random Number is 25

Cube Thread Started

The Cube of the Random Number 25 is 15625


Square Thread Started

The Square of the Random Number 96 is 9216





Cube Thread Started

The Cube of the Random Number 45 is 91125




















Exp. No. 10. Write a java program to find the maximum value from the given type of elements using a generic function.

PROGRAM

import java.util.*;

class Generic1{

public static < E > void findMax(E[] elements)

{

Arrays.sort(elements);

System.out.println("The Maximum Element is " + elements[elements.length-1]);

}

public static void main( String args[] ) {

Integer[] intArray = { 10, 20, 30, 40, 50 };

Character[] charArray = { 'J', 'A', 'V', 'A', 'T','P','O','I','N','T' };

Double[] doubleArray={1.5,2.5,3.9,22.5,9.0};

findMax( intArray );

findMax( charArray );

findMax(doubleArray);

}

}

OUTPUT

G:\R17OOPSLAB\progs>javac Generic1.java

G:\R17OOPSLAB\progs>java Generic1

The Maximum Element is 50

The Maximum Element is V

The Maximum Element is 22.5


Exp. No. 11. Design a calculator using event-driven programming paradigm of Java with the following options.

a) Decimal manipulations

b) Scientific manipulations

PROGRAM

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import javax.swing.event.*;

public class ScientificCalculator extends JFrame implements ActionListener {

JTextField tfield;

double temp, temp1, result, a;

static double m1, m2;

int k = 1, x = 0, y = 0, z = 0;

char ch;

JButton b1, b2, b3, b4, b5, b6, b7, b8, b9, zero, clr, pow2, pow3, exp,

fac, plus, min, div, log, rec, mul, eq, addSub, dot, sqrt, sin, cos, tan;

Container cont;

JPanel textPanel, buttonpanel;

ScientificCalculator() {

cont = getContentPane();

cont.setLayout(new BorderLayout());

JPanel textpanel = new JPanel();

tfield = new JTextField(25);

tfield.setHorizontalAlignment(SwingConstants.RIGHT);

tfield.addKeyListener(new KeyAdapter() {

public void keyTyped(KeyEvent keyevent) {

char c = keyevent.getKeyChar();

if (c >= '0' && c <= '9') {

} else {

keyevent.consume();

}

}

});

textpanel.add(tfield);

buttonpanel = new JPanel();

buttonpanel.setLayout(new GridLayout(8, 4, 2, 2));

boolean t = true;

b1 = new JButton("1");

buttonpanel.add(b1);

b1.addActionListener(this);

























zero = new JButton("0");

buttonpanel.add(zero);

zero.addActionListener(this);

plus = new JButton("+");

buttonpanel.add(plus);

plus.addActionListener(this);

min = new JButton("-");

buttonpanel.add(min);

min.addActionListener(this);

mul = new JButton("*");

buttonpanel.add(mul);

mul.addActionListener(this);

div = new JButton("/");

div.addActionListener(this);

buttonpanel.add(div);

addSub = new JButton("+/-");

buttonpanel.add(addSub);

addSub.addActionListener(this);

dot = new JButton(".");

buttonpanel.add(dot);

dot.addActionListener(this);

eq = new JButton("=");

buttonpanel.add(eq);

eq.addActionListener(this);

rec = new JButton("1/x");

buttonpanel.add(rec);

rec.addActionListener(this);

sqrt = new JButton("Sqrt");

buttonpanel.add(sqrt);

sqrt.addActionListener(this);

log = new JButton("log");

buttonpanel.add(log);

log.addActionListener(this);

sin = new JButton("SIN");

buttonpanel.add(sin);

sin.addActionListener(this);

cos = new JButton("COS");

buttonpanel.add(cos);

cos.addActionListener(this);

tan = new JButton("TAN");

buttonpanel.add(tan);

tan.addActionListener(this);

pow2 = new JButton("x^2");

buttonpanel.add(pow2);

pow2.addActionListener(this);

pow3 = new JButton("x^3");

buttonpanel.add(pow3);

pow3.addActionListener(this);

exp = new JButton("Exp");

exp.addActionListener(this);

buttonpanel.add(exp);

fac = new JButton("n!");

fac.addActionListener(this);

buttonpanel.add(fac);

clr = new JButton("AC");

buttonpanel.add(clr);

clr.addActionListener(this);

cont.add("Center", buttonpanel);

cont.add("North", textpanel);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent e) {

String s = e.getActionCommand();

if (s.equals("1")) {

if (z == 0) {

tfield.setText(tfield.getText() + "1");

} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}


if (z == 0) {


} else {

tfield.setText("");


z = 0;

}

}

if (s.equals("AC")) {

tfield.setText("");

x = 0;

y = 0;

z = 0;

}

if (s.equals("log")) {

if (tfield.getText().equals("")) {

tfield.setText("");

} else {

a =

Math.log(Double.parseDouble(tfield.getText()));

tfield.setText("");

tfield.setText(tfield.getText() + a);

}

}

if (s.equals("1/x")) {


tfield.setText("");

} else {

a = 1 /

Double.parseDouble(tfield.getText());

tfield.setText("");


}

}

if (s.equals("Exp")) {


tfield.setText("");

} else {

a =

Math.exp(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}

if (s.equals("x^2")) {


tfield.setText("");

} else {

a =

Math.pow(Double.parseDouble(tfield.getText()), 2);

tfield.setText("");


}

}

if (s.equals("x^3")) {


tfield.setText("");

} else {

a =

Math.pow(Double.parseDouble(tfield.getText()), 3);

tfield.setText("");


}

}

if (s.equals("+/-")) {

if (x == 0) {

tfield.setText("-" + tfield.getText());

x = 1;

} else {

tfield.setText(tfield.getText());

}

}

if (s.equals(".")) {

if (y == 0) {

tfield.setText(tfield.getText() + ".");

y = 1;

} else {

tfield.setText(tfield.getText());

}

}

if (s.equals("+")) {


tfield.setText("");

temp = 0;

ch = '+';

} else {

temp = Double.parseDouble(tfield.getText());

tfield.setText("");

ch = '+';

y = 0;

x = 0;

}

tfield.requestFocus();

}

if (s.equals("-")) {


tfield.setText("");

temp = 0;

ch = '-';

} else {

x = 0;

y = 0;


tfield.setText("");

ch = '-';

}


}

if (s.equals("/")) {


tfield.setText("");

temp = 1;

ch = '/';

} else {

x = 0;

y = 0;


ch = '/';

tfield.setText("");

}


}

if (s.equals("*")) {


tfield.setText("");

temp = 1;

ch = '*';

} else {

x = 0;

y = 0;


ch = '*';

tfield.setText("");

}


}

if (s.equals("MC")) {

m1 = 0;

tfield.setText("");

}

if (s.equals("MR")) {

tfield.setText("");

tfield.setText(tfield.getText() + m1);

}

if (s.equals("M+")) {

if (k == 1) {

m1 = Double.parseDouble(tfield.getText());

k++;

} else {

m1 += Double.parseDouble(tfield.getText());

tfield.setText("" + m1);

}

}

if (s.equals("M-")) {

if (k == 1) {

m1 = Double.parseDouble(tfield.getText());

k++;

} else {

m1 -= Double.parseDouble(tfield.getText());

tfield.setText("" + m1);

}

}

if (s.equals("Sqrt")) {


tfield.setText("");

} else {

a =

Math.sqrt(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}

if (s.equals("SIN")) {


tfield.setText("");

} else {

a =

Math.sin(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}

if (s.equals("COS")) {


tfield.setText("");

} else {

a =

Math.cos(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}

if (s.equals("TAN")) {


tfield.setText("");

} else {

a =

Math.tan(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}

if (s.equals("=")) {


tfield.setText("");

} else {

temp1 =

Double.parseDouble(tfield.getText());

switch (ch) {

case '+':

result = temp + temp1;

break;

case '-':

result = temp - temp1;

break;

case '/':

result = temp / temp1;

break;

case '*':

result = temp * temp1;

break;

}

tfield.setText("");

tfield.setText(tfield.getText() + result);

z = 1;

}

}

if (s.equals("n!")) {


tfield.setText("");

} else {

a =

fact(Double.parseDouble(tfield.getText()));

tfield.setText("");


}

}


}

double fact(double x) {

int er = 0;

if (x < 0) {

er = 20;

return 0;

}

double i, s = 1;

for (i = 2; i <= x; i += 1.0)

s *= i;

return s;

}

public static void main(String args[]) {

try {

UIManager

.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

} catch (Exception e) {

}

ScientificCalculator f = new ScientificCalculator();

f.setTitle("ScientificCalculator");

f.pack();

f.setVisible(true);

}

}

OUTPUT

Content Beyond the Syllabus (JDBC)

Develop a simple OPAC system for library using even-driven and concurrent programming paradigms of Java. Use JDBC to connect to a back-end database.

Program

import java.sql.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.table.*;

public class Library implements ActionListener

{

JRadioButton rbauthor = new JRadioButton("Search by Author Name");

JRadioButton rbbook = new JRadioButton("Search by Book Name");

JTextField textfld = new JTextField(30);

JLabel label = new JLabel("Enter Search Key");

JButton searchbutton = new JButton("Search");

JFrame frame = new JFrame();

JTable table;

DefaultTableModel model;

String query = "select * from library";

public Library()

{

frame.setTitle("Online Public Access Catalog(OPAC)");

frame.setSize(500,600);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setLayout(new BorderLayout());

JPanel p1 = new JPanel();



p1.setLayout(new FlowLayout());

p1.add(label);

p1.add(textfld);

ButtonGroup bg = new ButtonGroup();

bg.add(rbauthor);

bg.add(rbbook);

p2.setLayout(new FlowLayout());

p2.add(rbauthor);

p2.add(rbbook);

p2.add(searchbutton);

searchbutton.addActionListener(this);

p3.setLayout(new BorderLayout());

p3.add(p1,BorderLayout.NORTH);

p3.add(p2,BorderLayout.CENTER);

frame.add(p3,BorderLayout.NORTH);

addTable(query);

frame.setVisible(true);

}

public void addTable(String s)

{

try

{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

Connection conn =

DriverManager.getConnection("jdbc:odbc:Library","","");

Statement st = conn.createStatement();

ResultSet rs = st.executeQuery(s);

ResultSetMetaData md = rs.getMetaData();

int cols = md.getColumnCount();

model = new DefaultTableModel(1,cols);

table = new JTable(model);

String[] tabledata = new String[cols];

int i=0;

while(i

{

tabledata[i] = md.getColumnName(i+1);

i++;

}

model.addRow(tabledata);

while(rs.next())

{

for(i=0;i

tabledata[i] = rs.getObject(i+1).toString();

model.addRow(tabledata);

}

frame.add(table,BorderLayout.CENTER);

conn.close();

}catch(Exception e){}

}

public void actionPerformed(ActionEvent evt)

{

if(rbauthor.isSelected())

query = "select * from library where AuthorName like

'"+textfld.getText()+"%'";

if(rbbook.isSelected())

query = "select * from library where BookName like

'"+textfld.getText()+"%'";

while(model.getRowCount()>0)

model.removeRow(0);

frame.remove(table);

addTable(query);

}

public static void main(String[] args)

{

new Library();

}

}

OUTPUT

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