pgms

JAVA PROGRAMS

1

PROGRAM TO FIND THE SUM OF ARRAY USING RECURSIONimport java.io.*;

class Arraysum

{

int temp;

int sum(int a[],int n)

{

if(n==1)

return a[0];

else

temp =sum(a,n-1);

temp=temp+a[n-1];

return temp;

}

}

class Newarray

{

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

{

DataInputStream dis=new DataInputStream(System.in);

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

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

int a[]=new int[10];

System.out.println("Enter the array");

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

{

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

}

2

Arraysum a1=new Arraysum();

System.out.println("Array sum is"+ a1.sum(a,n));

}

}

OUTPUT

E:\3msc\veena>java Newarray

Enter limit

3

Enter the array

2

3

4

Array sum is 9

3

PROGRAM TO FIND FACTORIAL OF NUMBER USING RECURSION

import java.io.*;

class Factorial

{

int fact(int n)

{

if(n<=1)

return 1;

else

return (n*fact(n-1));

}

}

class Newfact

{


{


System.out.println("Enter the number");

int i=Integer.parseInt(dis.readLine());

Factorial f=new Factorial();

System.out.println("Factorial is"+f.fact(i));

}

}

OUTPUT

E:\3msc\veena>javac Newfact.java

Note: Newfact.java uses or overrides a deprecated API.

4

Note: Recompile with -Xlint:deprecation for details.

E:\3msc\veena>java Newfact

Enter the number

5

Factorial is 120

5

PROGRAM TO PRINT FIBONACCI NUMBERS

import java.io.*;

class Fib

{

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

{

DataInputStream dim=new DataInputStream(System.in);

System.out.println("Enter the limit");

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

int f1=0,f2=1,f3=0;

while(f3<=n)

{

f1=f2;

f2=f3;

System.out.println(f3);

f3=f1+f2;

}

}

}

OUTPUT

E:\3msc\java\joby>java Fib

Enter the limit

6

0

6

1

1

2

3

5

7

PROGRAM TO INPUT THE RADIUS AND HEIGHT OF A CYLINDER AND FIND SURFACE AREA, VOLUME AND TOTAL AREA

import java.io.*;

class Cylin

{

double radius,height;

double sidearea(int r,int h) //side area of cylinder

{

double sa=2*3.14*r*h;

return(sa);

}

double volume(int r,int h) //volume of cylinder

{

double vol=3.14*r*r*h;

return(vol);

}

double totalarea(int r,int h) //total area of cylinder

{

double ta=2*3.14*r*(h+r);

return(ta);

}

}

class Cylinder

{

8

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

{

DataInputStream obj=new DataInputStream(System.in);

System.out.println("Enter the radius");

int r=Integer.parseInt(obj.readLine());

System.out.println("Enter the height");

int h=Integer.parseInt(obj.readLine());

Cylin c=new Cylin();

System.out.println("Side area of cylinder="+c.sidearea(r,h));

System.out.println("Volume of cylinder="+c.volume(r,h));

System.out.println("Total area of cylinder="+c.totalarea(r,h));

}

}

OUTPUT

E:\3msc\sruthy>java Cylinder

Enter the radius

5

Enter the height

10

Side area of cylinder=314.0

Volume of cylinder=785.0

Total area of cylinder=471.00000000000006

9

DEFINE CLASS BABY WITH FOLLOWING ATTRIBUTE (NAME, DATE OF BIRTH, DATE ON WHICH BY INJECTION HAS TO BE GIVEN ,DATE ON WHICH POLIO DROPS TO BE GIVEN). WRITE A CONSTRUCTOR TO CONSTRUCT THE BABY OBJECT.THE CONSTRUCTOR MUST FIND OUT BCG AND POLIO DROPS DATES FROM THE DATE OF BIRTH

import java.util.*;

class Baby

{

String name;

Date dob,bcgdate,poliodate;

long bcgtime,poliotime;

Baby(String name,Date d)

{

this.name=name;

dob=d;

bcgdate=new Date();

poliodate=new Date();

bcgtime=dob.getTime()+(60*24*24*60*10001);

poliotime=dob.getTime()+(45*24*60*60*10001);

poliodate.setTime(poliotime);

bcgdate.setTime(bcgtime);

}

void display()

{

System.out.println("\nName:"+name+"\nDate ofBirth: "+dob.getDate()+

"/"+dob.getMonth()+"/"+dob.getYear()+"\nPolio Drops on: "+

poliodate.getDate() +"/"+dob.getMonth()+"/"+dob.getYear()+

" \nbcgdate on:"+bcgdate.getDate()+"/"+dob.getMonth()+"/"+dob.getYear());

}

10

public static void main(String args[])

{

Baby b=new Baby("Gouri",new Date(2011,1,1));

b.display();

}

}

OUTPUT

E:\msc3\anu>javac Baby.java

Note: Baby.java uses or overrides a deprecated API.


E:\msc3\anu>java Baby

Name:Gouri

Date ofBirth: 1/1/2011

Polio Drops on: 3/1/2011

bcgdate on:23/1/2011

PRINT THE DETAILS OF FIVE EMPLOYEES AS PER THEIR DATE OF APPOINTMENT

11

import java.util.*;

public class Employee

{

Date doa;

String name;

String empcode;

Employee(String name,Date doa,String empcode)

{

this.name=name;

this.doa=doa;

this.empcode=empcode;

}

void displayEmployee()

{

System.out.println("\n Name :"+name+" \n Employee code :"+empcode+" \n date of appoinment :"+doa.getDate()+"/"+doa.getMonth()+"/"+doa.getYear());

}


{

Employee e[];

int k;

e=new Employee[5];

e[0]=new Employee("Deepa",new Date(98,3,22),"D323");

e[1]=new Employee("Catharine",new Date(96,3,22),"E278");

e[2]=new Employee("Boby",new Date(95,3,22),"B428");

e[3]=new Employee("Ebenezer",new Date(98,4,22),"K172");

e[4]=new Employee("Akila",new Date(98,3,20),"A821");

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

{

12

for(int j=i+1;j<=4;j++)

{

if(e[i].doa.after(e[j].doa))

{

Employee temp;

temp=e[i];

e[i]=e[j];

e[j]=temp;

}

}

}

for( k=0;k<5;k++)

{

e[k].displayEmployee();

}

}

}

OUTPUT

E:\msc3\jilu\java>javac Employee.java

Note: Employee.java uses or overrides a deprecated API.


E:\msc3\jilu\java>java Employee

Name :Boby

Employee code :B428

date of appoinment :22/3/95

13

Name :Catharine

Employee code :E278


Name :Akila

Employee code :A821


Name :Deepa

Employee code :D323


Name :Ebenezer

Employee code :K172


E:\msc3\jilu\java>

DEFINE CLASS TELEVISION, DEFINE A METHOD FOR DISPLAYING ATTRIBUTES OF TELEVISION

import java.util.*;

14

class Television

{

String make;

int size;

Date dop;

boolean iscolor;

Television(String m,int s,Date d,boolean c)

{

make=m;

size=s;

dop=d;

iscolor=c;

}

void display()

{

System.out.println("\n make : "+make+"\n size: "+size+"\n date of purchase:"+dop.getDate()+"/"+dop.getMonth()+"/"+dop.getYear());

if(iscolor)

System.out.println("color tv");

else

System.out.println("black & white tv");

}


{

Television t,t1;

t=new Television("BPL",53,new Date(92,1,1),true);

t1=new Television("DYANORA",51,new Date(90,11,11),false);

t.display();

t1.display();

15

}

}

OUTPUT

E:\msc3\jilu\java>javac Television.java

Note: Television.java uses or overrides a deprecated API.


E:\msc3\jilu\java>java Television

make : BPL

size: 53

date of purchase:1/1/92

color tv

make : DYANORA

size: 51

date of purchase:11/11/90

black & white tv

DEFINE A ROOM WITH ATTRIBUTES (LENGTH, BREADTH, HEIGHT, FLOOR AREA, WALL AREA, NUMBER OF FANS, NUMBER OF WINDOWS, AND NUMBER OF DOORS).DEFINE A CONSTRUCTOR AND

16

METHOD TO DISPLAY DETAILS OF A ROOM. ASSUME THAT 20% OF THE TOTAL WALL AREA IS OCCUPIED BY DOORS AND WINDOWS

import java.io.*;

class Room

{

double length,breadth,height;

double farea,warea;

int fans,lights,windows,doors;

Room(double len,double br,double ht,int fn,int lt,int wd,int dr)

{

length=len;

breadth=br;

height=ht;

farea=length*breadth;

warea=2*(length*height + breadth*height)*0.80;

fans=fn;

lights=lt;

windows=wd;

doors=dr;

}

void display()

{

System.out.println("Length:"+length+"\nBreadth:"+breadth+"\nHeight:"+height);

System.out.println("FloorArea is:"+farea+"\nWallArea is:"+warea);

System.out.println("Doors:"+doors+"\nWindows:"+windows+

"\nLights:"+lights+"\nFans:"+fans);

}

}

class Room1

17

{


{


System.out.println("enter length, breadth and height:");

double l=Double.parseDouble(dis.readLine());

double b=Double.parseDouble(dis.readLine());

double h=Double.parseDouble(dis.readLine());

System.out.println("enter the no.of fans:");

int f=Integer.parseInt(dis.readLine());

System.out.println("enter the no.of lights:");

int lg=Integer.parseInt(dis.readLine());

System.out.println("enter the no.of windows:");

int w=Integer.parseInt(dis.readLine());

System.out.println("enter the no.of doors:");

int d=Integer.parseInt(dis.readLine());

Room r=new Room(l,b,h,f,lg,w,d);

r.display();

}

}

OUTPUT

E:\msc3\anu>javac Room1.java

E:\msc3\anu>java Room1

enter length, breadth and height:

10

10

10

enter the no.of fans:

18

2

enter the no.of lights:

1

enter the no.of windows:

2

enter the no.of doors:

1

Length:10.0

Breadth:10.0

Height:10.0

FloorArea is:100.0

WallArea is:320.0

Doors:1

Windows:2

Lights:1

Fans:2

PROGRAM TO DISPLAY STACK OPERATIONSimport java.io.*;

import java.util.*;

19

class Demo

{

static final int max=4;

int a[]=new int[max];

int top;

Demo()

{

top=-1;

}

void push(int item)

{

if(top==max)

System.out.println("Stack is full");

else

a[++top]=item;

}

int pop()

{

if(top==-1)

return 0;

else

return a[top--];

}

void display()

{

System.out.println("New Stack Is:");

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

System.out.println(a[i]);

20

}

}

class Stacks

{


{


Demo s=new Demo();

int op;

do

{

System.out.println("\n1.push\n2.pop\n3.display4.exit\n");

op=Integer.parseInt(dim.readLine());

switch(op)

{

case 1:System.out.println("enter item to push");


s.push(n);

break;

case 2:int f=s.pop();

if(f==0)

{

System.out.println("empty stack:");

}

else

{

System.out.println("poped element is"+f);

}

21

break;

case 3:s.display();break;

case 4:break;

default:System.out.println("wrong choice?");

}

}while(op!=4);

}

}

OUTPUT

E:\3msc\java\joby>java Stacks

1.push

2.pop

3.display

4.exit

1

enter item to push

1

1.push

2.pop

3.display

4.exit

1

enter item to push

2

1.push

2.pop

3.display

4.exit

22

3

New Stack Is:

1

2

1.push

2.pop

3.display

4.exit

2

poped element is2

1.push

2.pop

3.display

4.exit

3

New Stack Is:

1

1.push

2.pop

3.display

4.exit

4

PROGRAM TO CONSTRUCT PYRAMID OF DIGITS

class Number

{

23

public static void main(String arg[])

{

int n=8,i,j,k;

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

{

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

System.out.print(" ");

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

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

System.out.println(" ");

}

}

}

OUTPUT

E:\3msc\java\liya>java Number

1

2 2

3 3 3

4 4 4 4

5 5 5 5 5

6 6 6 6 6 6

7 7 7 7 7 7 7

8 8 8 8 8 8 8 8

PROGRAM TO FIND VOLUME OF YOUR BEDROOM AND KITCHEN USING INHERITANCE

import java.io.*;

24

class Broom

{

int length,width,height;

Broom(int l,int w,int h)

{

length=l;

width=w;

height=h;

}

int volume()

{

return(length*width*height);

}

}

class Kroom extends Broom

{

Kroom(int l,int w,int h)

{

super(l,w,h);

}

void display()

{

System.out.println("Volume is:"+volume());

}

}

class Nbroom1

{


25

{


System.out.println("enter the parametrs of bedroom");

System.out.println("enter length");

int a=Integer.parseInt(dis.readLine());

System.out.println("enter width");

int b=Integer.parseInt(dis.readLine());

System.out.println("enter height");

int c=Integer.parseInt(dis.readLine());

Kroom k=new Kroom(a,b,c);

k.display();

System.out.println("enter the parametrs of kitchen");


int g=Integer.parseInt(dis.readLine());

System.out.println("enter width");

int h=Integer.parseInt(dis.readLine());



Kroom k1=new Kroom(g,h,i);

k1.display();

}

}

OUTPUT

E:\msc3\jilu\java>javac Nbroom1.java

E:\msc3\jilu\java>java Nbroom1

enter the parametrs of bedroom

26

enter length

10

enter width

20

enter height

30

Volume is:6000

enter the parametrs of kitchen

enter length

1

enter width

3

enter height

2

Volume is:6

PROGRAM TO FIND THE VOLUME OF A CLASS ROOM USING CONSTRUCTOR OVERLOADING

import java.io.*;

27

class Vroom

{

int length,width,height;

Vroom()

{

length=width=height=0;

}

Vroom(int l,int w,int h)

{

length=l;

width=w;

height=h;

}

Vroom(Vroom v)

{

length=v.length;

width=v.width;

height=v.height;

}

int volume()

{

return(length*width*height);

}

}

class Newv

{


{

28


System.out.println("enter the length");


System.out.println("enter the width");

int j=Integer.parseInt(dis.readLine());

System.out.println("enter the height");

int k=Integer.parseInt(dis.readLine());

Vroom v1=new Vroom(i,j,k);

int vol=v1.volume();

System.out.println("Volume="+vol);

}

}

OUTPUT

E:\vee>java New

enter the length

2

enter the width

3

enter the height

4

Volume=24

PROGRAM TO FIND AREA OF DIFFERENT SHAPES USING METHOD OVERLOADING

29

import java.io.*;

class Area

{

void area(int l,int b)

{

int ar=l*b;

System.out.println("Area of rectangle="+ar);

}

void area(double r,double h)

{

double ar=(3.14*r*r*h);

System.out.println("Area of circle="+ar);

}

void area(int a)

{

int ar=a*a;

System.out.println("Area of square="+ar);

}

void area(float b,float h)

{

double ar=0.5*b*h;

System.out.println("Area of triangle="+ar);

}

}

class Newar

{


30

{

Area r=new Area();




System.out.println("enter breadth");

int j=Integer.parseInt(dis.readLine());

r.area(i,j);

System.out.println("enter radius");

double k=Double.parseDouble(dis.readLine());


double l=Double.parseDouble(dis.readLine());

r.area(k,l);

System.out.println("enter the length of one side");

int m=Integer.parseInt(dis.readLine());

r.area(m);

System.out.println("enter base");

float n=Float.parseFloat(dis.readLine());


float o=Float.parseFloat(dis.readLine());

r.area(n,o);

}}

OUTPUT

E:\vee>java Newar

enter length

2

enter breadth

2

31

Area of rectangle=4

enter radius

2

enter height

2

Area of circle=25.12

enter the length of one side

2

Area of square=4

enter base

2

enter height

2

Area of triangle=2.0

PROGRAM TO DISPLAY QUEUE OPERATIONS

32

import java.io.*;

class Demo

{

static final int max=4;

int a[]=new int[max];

int top,it,rear,front;

Demo()

{

rear=-1;

front=-1;

}

void insert(int item)

{

if(rear==max)

System.out.println("Queue is full");

else

{

if(rear==-1)

{

front=0;

rear=0;

}

a[rear++]=item;

}

}

int del()

{

if(front==-1)

33

{

it=0;

}

else

{

it=a[front];

if(front==rear)

{

rear=-1;

front=-1;

}

else

front=front+1;

}

return(it);

}

void display()

{

System.out.println("New Queue Is:");

for(int i=front;i<rear;i++)

System.out.println(a[i]);

}

}

class Queue

{


{


34

Demo s=new Demo();

int op;

do

{

System.out.println("\n1.insert\n2.delete\n3.display4.exit\n");

op=Integer.parseInt(dim.readLine());

switch(op)

{

case 1:System.out.println("enter the item to insert");


s.insert(n);

break;

case 2:int f=s.del();

System.out.println(f);

if(f==0)

{

System.out.println("empty queue:");

}

else

{

System.out.println("Deleted element is:"+f);

}

break;

case 3:s.display();break;

case 4:break;

default:System.out.println("wrong choice?");

}

35

}while(op!=4);

}

}

OUTPUT

E:\3msc\java\joby>java Queue

1.insert

2.delete

3.display4.exit

1

enter the item to insert

1

1.insert

2.delete

3.display4.exit

1


2

1.insert

2.delete

3.display4.exit

1


3

1.insert

2.delete

3.display4.exit

3

New Queue Is:

36

1

2

3

1.insert

2.delete

3.display4.exit

2

1

Deleted element is:1

1.insert

2.delete

3.display4.exit

3

New Queue Is:

2

3

1.insert

2.delete

3.display4.exit

4

PROGRAM TO FIND THE AREA OF DIFFERENT SHAPES USING METHOD OVERRIDING

37

import java.io.*;

class Figure

{

double x,y;

Figure(double l, double m)

{

x=l;

y=m;

}

}

class Rectangle extends Figure

{

Rectangle(double l, double m)

{

super(l,m);

}

double area()

{

return(x*y);

}

}

class Circle extends Figure

{

final float pi=3.14f;

Circle(double l,double m)

{

super(l,m);

38

}

double area()

{

return(pi*x);

}

}

class Triangle extends Figure

{

Triangle(double d1,double d2)

{

super(d1,d2);

}

double area()

{

return((x*y)/2);

}

}

class Over

{

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

{

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

Figure f;

System.out.println("enter the length and breadth");

Rectangle r=new Rectangle(Integer.parseInt(br.readLine()), Integer.parseInt(br.readLine()));

f=r;

System.out.println("the area of the rectangle is"+r.area());

39

System.out.println("enter the radius" );

Circle ci=new Circle(Integer.parseInt(br.readLine()),Integer.parseInt(br.readLine()));

f=ci;

System.out.println("The area of circle is"+ci.area());

System.out.println("Enter the breadth and height");

Triangle t=new Triangle(Integer.parseInt(br.readLine()),Integer.parseInt(br.readLine()));

f=t;

System.out.println("the area of triangle is "+t.area());

}

}

OUTPUT

E:\111msc\java>java Over

enter the length and breadth

2

3

the area of the rectangle is6.0

enter the radius

2

1

The area of circle is6.28000020980835

Enter the breadth and height

3

4

the area of triangle is 6.0

40

AN EXAMPLE FOR DYNAMIC METHOD DISPATCH

class A

{

void display()

{

System.out.println("Inside A");

}

}

class B extends A

{

void display()

{

System.out.println("Inside B");

}

}

class C extends B

{

void display()

{

System.out.println("Inside C");

}

}

class OverrideDemo

{


{

A a=new A();

B b=new B();

41

C c=new C();

A r;

r=a;

r.display();

r=b;

r.display();

r=c;

r.display();

}

}

OUTPUT

E:\111msc\java>java OverrideDemo

Inside A

Inside B

Inside C

42

PROGRAM TO FIND ROOTS OF QUADRATIC EQUATION BY USING PACKAGE AND INTERFACE

QuadEqn.java

package p;

interface Quadratic

{

void process();

}

public class QuadEqn implements Quadratic

{

double a,b,c,d;

public QuadEqn(double x,double y,double z)

{

a=x;

b=y;

c=z;

}

public void process()

{

d=b*b-(4*a*c);

if(d==0)

{

double r=-b/2*a;

System.out.println("Roots are equal.Root=\t"+r);

}

else

if(d>0)

43

{

double sq=Math.sqrt(d);

double r1=(-b+sq)/2*a;

double r2=(-b-sq)/2*a;

System.out.println("Root1=\t"+r1+"\nRoot2=\t"+r2);

}

else

System.out.println("Roots are imaginary\n");

}

}

QuadM.java

import java.io.*;

import p.QuadEqn;

class QuadM

{


{

try

{


System.out.println("Enter the values of a,b,c\n");

double p=Double.parseDouble(dis.readLine());

double q=Double.parseDouble(dis.readLine());

double r=Double.parseDouble(dis.readLine());

QuadEqn ob=new QuadEqn(p,q,r);

ob.process();

}

catch(Exception e)

44

{

System.out.println("Error..."+e);

}

}

}

OUTPUT

E:\3msc\java\liya>java QuadM

Enter the values of a,b,c

1

3

2

Root1= -1.0

Root2= -2.0

45

PROGRAM TO DISPLAY MARK LIST OF N STUDENTS USING PACKAGE

StudPack.java

package p;

public class StudPack

{

int id,m1,m2,tot;

String n;

public void getdata(int num,String name,int mark1,int mark2)

{

id=num;

n=name;

m1=mark1;

m2=mark2;

tot=m1+m2;

}

public void display()

{

System.out.println("\n*******Student's Details*******");

System.out.println("Roll no:"+id+"\nName="+n+"\nEnglish="+m1+"\nScience="+m2+"\nTotal="+tot);

}

}

Student.java

import p.StudPack;

import java.io.*;

class Student

{

46


{

StudPack obj=new StudPack();


System.out.println("Enter the total no:of students\n");

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

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

{

System.out.println("Enter the Roll no:,Name,Mark1,Mark2of student of\t"+(i+1));

int a=Integer.parseInt(dis.readLine());

String b=dis.readLine();

int c=Integer.parseInt(dis.readLine());

int d=Integer.parseInt(dis.readLine());

obj.getdata(a,b,c,d);

obj.display();

}

}

}

OUTPUT

E:\3msc\java\liya>java Student

Enter the total no:of students

2

Enter the Roll no:,Name,Mark1,Mark2of student of 1

102

Emilu

50

47

46

*******Student's Details*******

Roll no:102

Name=Emilu

English=50

Science=46

Total=96

Enter the Roll no:,Name,Mark1,Mark2of student of 2

103

Sandra

50

50

*******Student's Details*******

Roll no:103

Name=Sandra

English=50

Science=50

Total=100

PROGRAM TO SORT N STRINGS USING IOSTREAM

48

import java.io.*;

class Dem21

{


{

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

int i,j,n=0;

String s1;

System.out.println("enter the array size:");

try

{

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

String s[]=new String[n];

System.out.println("enter the strings:");

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

{

s[i]=b.readLine();

}

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

{

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

{

if(s[i].compareTo(s[j])>0)

{

String tmp=s[i];

s[i]=s[j];

s[j]=tmp;

}

49

}

}

System.out.println("sorted names are:");

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

{

System.out.println(s[i]+"\t");

}

}

catch(Exception e)

{

System.out.println(e);

}

}

}

OUTPUT

E:\3msc\java\meenu>java Dem21

enter the array size:

3

enter the strings:

Rini

Geethu

Arya

sorted names are:

Arya

Geethu

Rini

50

PROGRAM TO CHECK WHETHER THE STRINGS ARE PALINDROME OR NOTimport java.io.*;

class Dem20

{


{

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

int i,n=0;

String s1;

try

{

System.out.println("enter the size of array:");

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

String s=new String[n];

System.out.println("enter the string:");

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

{

s[i]=b.readLine();

}

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

{

StringBuffer sb=new StringBuffer(s[i]) ;

s1=new String(sb.reverse());

if(s[i].equals(s1))

{

System.out.println("String is"+s[i]+""+"palindrome");

}

51

else

{

System.out.println("String is"+s[i]+""+"not palindrome");

}

}

}

catch(Exception e)

{

System.out.println(e);

}

}

}

OUTPUT

E:\3msc\java\meenu>java Dem20

enter the size of array:

3

enter the string:

aba

joby

jiss

String is aba palindrome

String is joby not palindrome

String is jiss snot palindrome

. PROGRAM TO FIND PRODUCT OF TWO METRICES

52

import java.io.*;

class Mult

{

int c[][]=new int[3][3];

void process(int a[][],int b[][],int m,int n,int p,int q)

{

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

for(int j=0;j<q;j++)

{

c[i][j]=0;

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

{

c[i][j]+=a[i][k]*b[k][j];

}

}

System.out.print("Product of two metrices is"+"\n");

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

{

for(int j=0;j<q;j++)

{

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

}

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

}

}

};

class MatrixMult

{

53


{

Mult am=new Mult();

int m,n,p,q,i,j,k;

int a[][]=new int[3][3];

int b[][]=new int[3][3];


System.out.println("Enter the order of first matrix");

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

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

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

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

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

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

System.out.println("Enter the order of second matrix");

p=Integer.parseInt(dis.readLine());

q=Integer.parseInt(dis.readLine());

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

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

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

b[i][j]=Integer.parseInt(dis.readLine());

am.process(a,b,m,n,p,q);

}

}

OUTPUT

E:\3msc\java\liya>java MatrixMult

Enter the order of first matrix

54

2

2

Enter the first matrix

2

2

2

2

Enter the order of second matrix

2

2

Enter the second matrix

2

2

2

2

Product of two metrices is

8 8

8 8

55

AN EXAMPLE FOR MULTITHREADING AND VARIOUS THREAD METHODSclass A extends Thread

{

public void run()

{

try

{

for(int i=0;i<=15;i++)

{

System.out.println("In thread A\t"+i);

if(i==10)

sleep(100);

}

}

catch(Exception e)

{

System.out.println("Exception"+e);

}

}

}

class B extends Thread

{

public void run()

{

for(int j=0;j<=15;j++)

{

System.out.println("In thread B\t"+j);

56

if(j==0) yield();

}

}

}

class C extends Thread

{

public void run()

{

for(int k=0;k<=15;k++)

{

System.out.println("In thread C\t"+k);

if(k==10) stop();

}

}

}

class Multthread

{


{

A obj1=new A();

B obj2=new B();

C obj3=new C();

obj1.start();

obj2.start();

obj3.start();

}

57

}

OUTPUT

E:\3msc\java\liya>java Multthread

In thread B 0

In thread A 0

In thread C 0

In thread B 1

In thread A 1

In thread C 1

In thread B 2

In thread A 2

In thread C 2

In thread B 3

In thread A 3

In thread C 3

In thread B 4

In thread A 4

In thread C 4

In thread B 5

In thread A 5

In thread C 5

In thread B 6

In thread A 6

In thread C 6

In thread B 7

In thread A 7

In thread C 7

In thread B 8

58

In thread A 8

In thread C 8

In thread B 9

In thread A 9

In thread C 9

In thread B 10

In thread A 10

In thread C 10

In thread B 11

In thread B 12

In thread B 13

In thread B 14

In thread B 15

In thread A 11

In thread A 12

In thread A 13

In thread A 14

In thread A 15

59

PROGRAM TO THROW AN USER DEFINED EXCEPTIONimport java.*;

class Myexception extends Exception

{

Myexception(String n)

{

super(n);

}

}

class Throwdemo

{


{

Myexception me=new Myexception("This is from me");

try

{

throw me;

}

catch(Myexception g)

{

System.out.println(g);

}

}

}

OUTPUT

E:\3msc\java\joby>java Throwdemo

Myexception: This is from me

60

PROGRAM TO DISPLAY A MOVING BANNER USING APPLETimport java.awt.*;

61

import java.applet.*;

//<applet code=Movingb width=100 height=100></applet>

public class Movingb extends Applet implements Runnable

{

String s="MOVING BANNER";

Thread t=null;

boolean flag;

public void init()

{

setBackground(Color.red);

setForeground(Color.blue);

}

public void start()

{

t=new Thread(this);

flag=false;

t.start();

}

public void run()

{

char ch;

for(; ;)

try

{

repaint();

Thread.sleep(1000);

ch=s.charAt(0);

s=s.substring(1,s.length());

62

s=s+ch;

if(flag==true)

break;

}

catch(InterruptedException ie)

{

}

}

public void stop()

{

flag=true;

t=null;

}

public void paint(Graphics g)

{

g.drawString(s,200,200);

}

}

OUTPUT

PROGRAM TO DRAW A HUMAN FACE USING APPLET

63


import java.awt.*;

import java.util.*;

import java.awt.event.*;

//<applet code=Face width=300 height=300></applet>

public class Face extends Applet

{

public void init()

{

setBackground(Color.red);

setForeground(Color.green);

}


{

Font f=new Font("Arial",Font.BOLD,20);

g.setFont(f);

g.drawOval(40,40,120,150);

g.drawOval(57,75,30,20);

g.drawOval(110,75,30,20);//eye

g.fillOval(68, 81,10,10);

g.fillOval(121, 81,10,10);

g.drawOval(85, 100,30,30);

g.drawOval(25, 92,15,30);

g.drawOval(160,90,15,30);

64

g.fillArc(60,125,80,40,180,180);

g.drawOval(160,90,15,30);

}

}

OUTPUT

E:\msc3\jiss\java>javac Face.java

E:\msc3\jiss\java>appletviewer Face.java

65

PROGRAM TO PERFORM ARITHMETIC OPERATIONS USING AWT CONTROLS


import java.awt.*;


import java.awt.Choice.*;

//<applet code=Awte width=500 height=555></applet>

public class Awte extends Applet implements TextListener,ActionListener

{

int a,b,c;

String s;

TextField f1,f2,f3;

Label l1,l2,l3;

Button Add,Sub,Mul,Div;

public void init()

{

//setBackground(Color.green);

setForeground(Color.red);

l1=new Label("First number");

l2=new Label("Second number");

l3=new Label("Result");

f1=new TextField(10);



//f3=new TextField(20);

//f2.setEchochar("*");

add(l1);

add(f1);

add(l2);

66

add(f2);

add(l3);

add(f3);

Add=new Button("Add");

Sub=new Button("Sub");

Mul=new Button("Mult");

Div=new Button("Div");

add(Add);

add(Sub);

add(Mul);

add(Div);

f1.addTextListener(this);



Add.addActionListener(this);

Sub.addActionListener(this);

Mul.addActionListener(this);

Div.addActionListener(this);

}

public void actionPerformed(ActionEvent ae)

{

a=Integer.parseInt(f1.getText());

b=Integer.parseInt(f2.getText());

if(ae.getActionCommand().equals("Add"))

c=a+b;

else if(ae.getActionCommand().equals("Sub"))

c=a-b;

67

else if(ae.getActionCommand().equals("Mult"))

c=a*b;

else

c=a/b;

s=String.valueOf(c);

repaint();

}

public void textValueChanged(TextEvent te)

{

}


{

f3.setText(s);

//g.drawString(String.valueOf(c),355,355);

}

}

OUTPUT

E:\msc3\jiss\java>javac awte.java

E:\msc3\jiss\java>appletviewer awte.java

68

PROGRAM TO DISPLAY MOUSE EVENTSimport java.applet.*;

import java.awt.*;


//<applet code=Eventapplet width=100 height=150></applet>

public class Eventapplet extends Applet implements MouseListener,MouseMotionListener

{

String msg=" ";

int x=0;

int y=0;

public void init()

{

setBackground(Color.pink);

addMouseListener(this);

addMouseMotionListener(this);

}

public void mousePressed(MouseEvent me)

{

x=me.getX();

y=me.getY();

msg="pressed";

repaint();

}

public void mouseExited(MouseEvent me)

{

}

public void mouseEntered(MouseEvent me)

{

}

70

public void mouseReleased(MouseEvent me)

{

}

public void mouseClicked(MouseEvent me)

{

}

public void mouseDragged(MouseEvent me)

{

}

public void mouseMoved(MouseEvent me)

{

}


{

g.drawString(msg,100,200);

}

}

OUTPUT

E:\msc3\jilu\java>javac Eventapplet.java

E:\msc3\jilu\java>appletviewer Eventapplet.java

71

PROGRAM TO DISLAY THE SUM OF TWO NUMBERS USING RMI

AddServerInf .java

import java.rmi.*;

public interface AddServerInf extends Remote

{

public double add(double d1,double d2) throws RemoteException;

}

AddServerImpl.java

import java.rmi.*;

import java.rmi.server.*;

public class AddServerImpl extends UnicastRemoteObject implements AddServerInf

{

AddServerImpl()throws RemoteException

{

}

public double add(double d1,double d2)throws RemoteException

{

return(d1+d2);

}

}

AddServer.java

import java.rmi.*;

import java.net.*;

public class AddServer

72

{


{

try

{

AddServerImpl asi=new AddServerImpl();

Naming.rebind("addserver",asi);

}

catch(Exception e)

{

System.out.print("Error......addserver "+e);

}

}

}

AddClient.java

import java.rmi.*;

public class AddClient

{


{

try

{

String url="rmi://"+arg[0]+"/addserver";

AddServerInf asi=(AddServerInf) Naming.lookup(url);

System.out.println("The first no is"+arg[1]);

System.out.println("The second no is"+arg[2]);

double d1=Double.parseDouble(arg[1]);

73

double d2=Double.parseDouble(arg[2]);

System.out.println("The sum is"+asi.add(d1,d2));

}

catch(Exception e)

{

System.out.print("Error....addclient"+e);

}

}

}

OUTPUT

E:\3msc>cd java

E:\3msc\java>cd liya

E:\3msc\java\liya>path=e:\jdk1.5.0\bin

E:\3msc\java\liya>javac AddServerInf.java

E:\3msc\java\liya>javac AddServerImpl.java

E:\3msc\java\liya>javac AddServer.java

E:\3msc\java\liya>javac AddClient.java

E:\3msc\java\liya>rmic AddServerImpl

E:\3msc\java\liya>start rmiregistry

74

E:\3msc\java\liya>java AddServer

E:\3msc\java\liya>java AddClient 127.0.0.1 5.0 5.0

The first no is5.0

The second no is5.0

The sum is10.0

75

PROGRAM TO FIND THE FACTORIAL OF A NUMBER USING RMI

FactServerInf.java

import java.rmi.*;

public interface FactServerInf extends Remote

{

public double fact(double d1) throws RemoteException;

}

FactServerImpl.java

import java.rmi.*;

import java.rmi.server.*;

public class FactServerImpl extends UnicastRemoteObject implements FactServerInf

{

FactServerImpl()throws RemoteException

{

}

public double fact(double d1)throws RemoteException

{

double f=1;

for(int i=1;i<=d1;i++)

{

f=f*i;

}

return(f);

}

}

FactServer.java

import java.rmi.*;

76

import java.net.*;

public class FactServer

{


{

try

{

FactServerImpl asi=new FactServerImpl();

Naming.rebind("factserver",asi);

}

catch(Exception e)

{

System.out.print("Error......factserver "+e);

}

}

}

FactClient.java

import java.rmi.*;

import java.net.*;

public class FactClient

{


{

double v1=Double.parseDouble(arg[1]);

try

{

77

String url="rmi://"+arg[0]+"/factserver";

FactServerInf asi=(FactServerInf) Naming.lookup(url);

System.out.println("The factorial is"+(asi.fact(v1)));

}

catch(Exception e)

{

System.out.print("Error....addclient"+e);

}

}

}

OUTPUT

E:\3msc\java\liya>javac FactServerInf.java

E:\3msc\java\liya>javac FactServerImpl.java

E:\3msc\java\liya>javac FactServer.java

E:\3msc\java\liya>javac FactClient.java

E:\3msc\java\liya>rmic FactServerImpl

E:\3msc\java\liya>start rmiregistry

E:\3msc\java\liya>java FactServer

E:\3msc\java\liya>java FactClient 127.0.0.1 5.0

The factorial is120.0

78

ORACLE

79

QUERY EXAMPLE 1

consider the following schema:-

student1(rollno,name,mark)

1.create a table

2.insert values into the table

3.update a row

4.delete a row

5.aggregate functions

6.alter table

7.drop table

OUT PUT

1.Create a table

SQL> create table student1(rollno int,name varchar(10),mark int);

Table created.

2.Inserting values into the table

SQL> insert into student1 values(1,'anu',320);

1 row created.

SQL> insert into student1 values(2,'jilu',330);

1 row created.

SQL> insert into student1 values(3,'jiss',340);

1 row created.

SQL> insert into student1 values(4,'joby',350);

1 row created.

SQL> insert into student1 values(5,'liya',325);

81

1 row created.

SQL> insert into student1 values(6,'meenu',326);

1 row created.

SQL> select * from student1;

ROLLNO NAME MARK

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

1 anu 320

2 jilu 330

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

6 rows selected.

3.Update a row

SQL> update student1 set name='sruthi' where rollno=1;

1 row updated.


ROLLNO NAME MARK

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

1 sruthi 320

2 jilu 330

3 jiss 340

4 joby 350

82

5 liya 325

6 meenu 326

6 rows selected.

4.Delete a row

SQL> delete student1 where rollno=2;

1 row deleted.


ROLLNO NAME MARK

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

1 sruthi 320

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

5. Aggregate functions

SQL> insert into student1 values(7,'shaney',300);

1 row created.

83


ROLLNO NAME MARK

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

1 sruthi 320

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

7 shaney 300

6 rows selected.

SQL> select * from student1 where mark>340;

ROLLNO NAME MARK

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

4 joby 350

SQL> select max(mark) from student1;

MAX(MARK)

----------

350

SQL> select min(mark) from student1;

84

MIN(MARK)

----------

300

SQL> select avg(mark)from student1;

AVG(MARK)

----------

326.833333

SQL> select count(rollno) from student;

COUNT(ROLLNO)

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

6

SQL> select count(rollno) from student1;

COUNT(ROLLNO)

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

6

SQL> select sum(mark) from student1;

SUM(MARK)

----------

85

1961

6. Alter table

SQL> alter table student1 add(address varchar(20));

Table altered.


ROLLNO NAME MARK ADDRESS

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

1 sruthi 320

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

7 shaney 300

6 rows selected.

SQL> alter table student1 drop column address;

Table altered.


86

ROLLNO NAME MARK

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

1 sruthi 320

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

7 shaney 300

6 rows selected.

SQL> alter table student1 modify(name varchar(20));

Table altered.


ROLLNO NAME MARK

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

1 sruthi 320

3 jiss 340

4 joby 350

5 liya 325

6 meenu 326

7 shaney 300

87

6 rows selected.

7. Drop table

SQL> drop table student1;

Table dropped.


select * from student1

*

ERROR at line 1:

ORA-00942: table or view does not exist

88

QUERY EXAMPLE 2

Consider the following schema:-

emp1(empno,empname,salary)

dept(deptno,deptname,manager)

Write the following queries in oracle and find the output

OUT PUT

table 1: emp1

empno deptn empname salary

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

101 d1 aaa 1000

102 d2 bbb 2000

103 d3 ccc 3000

104 d2 ddd 40000

105 d1 eee 30000

106 cr 20000

Table 2:dept

deptn deptname manager

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

d1 accounts mr.x

d2 management mr.y

d3 computer mr.z

1.List the employees working in accounts department

SQL>select empname from emp1 where deptno=(select deptno from dept1 where deptname='accounts');

89

empname

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

aaa

eee

2.Find the employees drawing salary higher than the lowest salary in accounts department

SQL> select empname from emp1 where salary>(select min(salary) from emp1 where deptno=(select deptno

from dept1 where deptname='accounts'));

empname

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

bbb

ccc

ddd

eee

3.List the employees working under the manager mr.x

SQL> select empname,empno from emp1 where deptno=(select deptno from dept1 where manager='mr.x');

empname empno

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

aaa 101

eee 105

4.find the avg salary of accounts department

90

SQL> select avg(salary) from emp1 where deptno=(select deptno from dept1 where deptname='accounts');

AVG(salary)

-----------

15500

5.List the employees who have not assigned to any department

SQL> select empname from emp1 where deptno = ' ';

empname

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

cr

91

QUERY EXAMPLE 3

Consider the following schema

Employee(employeename,street,city)

Works(employeename,companyname,salary)

Company(companyname,city)

Manager(employeename,managername)


OUTPUT

EMPLOYEENAME STREET CITY

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

Raju springvally kumily

Sumesh rosegarden Kottayam

Sunil bluerose pala

Anil songlers mavalikara

Denny maxiano kayamkulam

John backhills idukki

Deepak springvally kumily

Table 2.WORKS

EMPLOYEENAME COMPANYNAME SALARY

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

Raju firstbank 9000

Sumesh infovista 12500

Sunil infovista 11000

Anil focus 12300

92

Denny focus 10800

John focus 10800

Denny indiaoptions 8800

Deepak firstbank 12700

Table 3.COMPANY

COMPANYNAME CITY

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

firstbank kumily

infovista thodupuzha

focus attingal

indiaoptions thiruvalla

Table 4.MANAGER

EMPLOYEENAME MANAGERNAME

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

Raju mr x

Sunil mr y

Sumesh mr z

Anil mr a

Denny mr b

John mr c

Deepak mr d

(1) Find the names of all employees who work for 'first bank'

Ans;

SQL> select employeename from Works where companyname='firstbank';

93

EMPLOYEENAME

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

Raju

Deepak

(2) Find names ,street address and coties of residence of all employee who work for 'first bak' and earn more than 10,000 per annum

SQL> select employeename,street ,city from Employee where employeename=(select employeename from

Works where companyname='firstbank' and salary>10000);

Ans;

EMPLOYEENAME STREET CITY

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

Deepak springvally kumily

(3)Find the names of all employees in this databae who ilive in same city as the company for wich they work

SQL> select e.employeename from Employee e, company c where e.city=c.city;

EMPLOYEENAME

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

Raju

Deepak

94

QUERY EXAMPLE 4

Consider the following schema

Employee(emp_name,street,city)

Work1(emp_name,com_name,salary)

Company(com_name,city)


OUT PUT

SQL> select * from Work1;

EMPNAME COMPANYNAME SALARY

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

johan hcl 20000

ishan ipsr 60000

jennifer satyam 300000

kathi wipro 10000

saira infosys 12000

SQL> select * from Employe1;

EMPNAME STREET CITY

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

johan rosestreet ktm

ishan backstret ekm

jennifer crossroad tvm

kathi heavenly pala

saira bluerose idk

SQL> select *from Company1;

95

COMPANYNAME CITY

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

hcl tvm

ipsr ktm

satyam ekm

Retrieving data from multiple table

Find all the employees in the database who lived in the same city and as the company for which they work

SQL> select Employe1.empname from Employe1,Company1,Work1 where Employe1.empname=Work1.empname and Work1.companyname=Company1.companyname and Employe1.city=Company1.city;

EMPNAME

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

Mishel

Subquery

Find all employees in the database who earn more than employee of ipsr who earn the minimum salary

SQL> select empname from Work1 where salary>(select min(salary) from Work1 where companyname='ipsr');

EMPNAME

----------

ishan

Jennifer

Group-by/Having

Find the company that has the most employes

96

SQL> select companyname from Work1 group by companyname having count(empname)>=(select max(count(empname))from Work1 group by companyname);

COMPANYNAME

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ipsr

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pgms

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