Contents

Introduction to Java

DataType and Operation

Conditional statements

Iterative statements

Nested loops

Functions

OOPs

String

Static Data members

Inherintance

Polymorphisam

Applets

AWT

MultiThreading

I/o

Exception Handling

Collection FrameWork

Contents

Introduction to Java

DataType and Operation

Conditional statements

Iterative statements

Nested loops

Functions

OOPs

String

Static Data members

Inherintance

Polymorphisam

Applets

AWT

MultiThreading

I/o

Exception Handling

Collection FrameWork

Access Specifiers

It indicates accessibility of a member of a class. It can be

private
public
protected
(default)

private members

Such members are strictly controlled, which means they cannot be accesses by anywhere outside the enclosing class.
Generally data members are kept private because we want to hide internal details of object from the user of object.

public members

Such members are visible to any class in the Java program, whether these classes are in the same package or in another package.
Generally member functions are kept public because user wants to perform operations on object by calling its member functions.

protected members

Such members can be accessed by subclasses in same package as well as other packages and all classes of same package.
They are used with inheritance.

default members

Any member that has no declared access modifier is accessible only by classes in the same package.

#Program to create 2 rectangles a and b of size 5x7 and 10x20.Display area, perimeter of a and area of b.

Design a class Rectangle

Data members

Length
Breadth

Member Functions

Area()
Perimeter()

  class rectangle 
  {
    private int length,breadth;
    public void area()
    {
        int a=length*breadth;
        System.out.println("Area is "+a);
    }
    public void perimeter()
    {
        int p=2*(length+breadth);
        System.out.println("perimerter is"+p);
    }
    public void setdimension(int m,int n)
    {
        length=m;
        breadth=n;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        rectangle a, b ;
        a = new rectangle();
        b=new rectangle();
        a.setdimension(5,7);
        b.setdimension(10,20);
        a.area();
        a.perimeter();
        b.area();
    }
  }

Area is 35 
Perimeter is 24 
Area is 200

#Program to create a circle type of object of radius 5. display its area , circumference.

Design a class Circle

Data members

radius

Member Functions

Area()
circumference()
setRadius(n)

  class Circle 
  {
    private int radius;
    public void area()
    {
        double a=3.14*radius *radius;
        System.out.println("Area is "+a);
    }
    public void circumference()
    {
        double c=2*3.14*radius;
        System.out.println("circumference is"+c);
    }
    public void setRadius(int n)
    {
        radius=n;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Circle a;
        a=new Circle();
        a.setRadius(5);
        a.area();
        a.circumference();
    }
  }

Area is 78.5
Circumference is 31.4

#Program to create 2 boxes a and b of size 3 x 4 x 5 and 7 x 8 x 2. display volume of both boxes.

Design a class Box

Data members

Length
Breadth
Height

Member Functions

volume()
setDimension(x,y,z)

  class Box
  {
     int L,B,H;
    public void volume()
    {
        int v=L*B*H;
        System.out.println("Volume is "+v);
    }
    public void setDimension(int x,int y,int z)
    {
        L=x;
        B=y;
        H=z;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Box a,b;
        a=new Box();
        b=new Box();
        a.setdimension(3,4,5);
        b.setdimension(7,8,2);
        a.volume();
        b.volume();
    }
  }

Volume is 60 
Volume is 112

#Program to create a sphere type of object of radius 5. Display its volume.

Design a class Sphere

Data members

radius

Member Functions

volume()
setRadius(n)

  class Sphere 
  {
    private int R;
    public void volume()
    {
        double V=4/3.0*3.14*R*R*R;
        System.out.println("Volume is "+v);
    }
    public void setRadius(int n)
    {
        R=n;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Sphere a;
        a=new Sphere();
        a.setRadius(5);
        a.Volume();
    }
  }

Volume is 523.3333

#Program to create a 2 sets a = {4,5,7} and b={10,20,25}. Display sum of set a and sum, mean of set b.

Design a class Set

Data members

Member Functions

sum()
mean()
setData(x,y,z)

  class Set
  {
    private int n1,n2,n3;
    public void sum()
    {
        int s=n1+n2+n3;
        System.out.println("Sum is "+s);
    }
    public void mean()
    {
        double m=(n1+n2+n3)/3.0;
        System.out.println("Mean is "+m);
    }
    public void setData(int x,int y,int z)
    {
        n1=x;
        n2=y;
        n3=z;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Set a,b;
        a=new Set();
        b=new Set();
        a.setData(4,5,7);
        b.setData(10,20,25);
        a.sum();
        b.sum();
        b.mean();
    }
  }

Sum is 16 
Sum is 55
Mean is 18.333333

#Program to create a worker type of object whose name is Gopal wages is 500 wdays are 5. Display information of worker as well as payment.

Design a class Worker

Data members

name
wages
wdays

Member Functions

setdata(n,w,d)
showData()
payment()

  class Worker
  {
    private String name;
    private int wages,wdays;
    public void showData()
    {
        System.out.println("Name is "+name);
        System.out.println("Wages is "+wages);
        System.out.println("Wdays are "+wdays);
    }
    public void payment( )
    {
        int p=wages*wdays;
        System.out.println("Payment is "+p);
    }
    public void setData(String n,int w,int d)
    {
        name=n;
        wages=w;
        wdays=d;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Worker a;
        a=new Worker();
        a.setData("Gopal",500,5);
        a.showData();
        a.payment();
    }
  }

Name is Gopal
Wages is 500
Wdays are 5
Payment is 2500

#Program to create a account type of object whose accountno. 44117 and balance 5000. And Find simple interest where 10.45 of 5 year.

Design a class Account

Data members

accno
balance

Member Functions

setData(an,bl)
interest(r,n)

  class Account
  {
    private int accno,balance;
    public void interest(double r,int n)
    {
        double si=balance*r*n/100.0;
        System.out.println("Interest is "+si);
    }
    public void setData(int an,int bl)
    {
        accno=an;
        balance=bl;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Account a;
        a=new Account();
        a.setData(44117,5000);
        a.interest();
    }
  }

Interest is 2612.5

CCITcoder

Introduction to Java

DataType and Operation

Conditional statements

Iterative statements

Functions

OOPs

String

Static Data members

Inherintance

Polymorphisam

Applets

AWT

MultiThreading

I/o

Exception Handling

Collection FrameWork

Introduction to Java

DataType and Operation

Conditional statements

Iterative statements

Functions

OOPs

String

Static Data members

Inherintance

Polymorphisam

Applets

AWT

MultiThreading

I/o

Exception Handling

Collection FrameWork

Access Specifiers