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

Member functions

Method Overloading

Defining multiple member functions/methods in a class having same name is called as Member function/method overloading.
Only precaution to be taken is that

No of arguments or
Type of arguments or
Sequence of arguments must be different

Compiler will decide which member function to call depending on no of arguments or type of arguments or sequence of arguments that are passed while calling the member function / method.
The Advantage of member function overloading is that we can perform same type of operations on a object in different way

Syntax

[AccessSpecifier] [Modifier] returntype funcName(datatype arg1,...)
{
    Statements
    -----------
    return value;
}

#Program to create 3 rectangles a,b,c of size 5 x 7 , 4 x 6 , and 8 x 8. Calculate their total Area.

Design a class Rectangle

Data members

Length
Breadth

Member Functions

Area()
setDimension(n,m)
setDimension(n)

  class Rectangle 
  {
    private int length,breadth;
    public int area()
    {
        int a = length*breadth;
        return a ;
    }
    public void setdimension(int m,int n)
    {
        length=m;
        breadth=n;
    }
    public void setdimension(int m)
    {
        length=m;
        breadth=m;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        rectangle a = new rectangle();
        rectangle b = new rectangle();
        rectangle c = new rectangle();
        a.setdimension(5,7);
        b.setdimension(4,6);
        c.setdimension(8);
        int z = a.area()+ b.area()+c.area();
        System.out.println("Total area is "+ z);
    }
  }

Total Area is 123

#Program to create 2 students a ( rollno=4117 name=Amit Jain ) , b ( name=Seeta Rathi rollno=3012 ) . Display their information.

Design a class Student

Data members

rollno
name

Member Functions

showdata()
setdata(rn,nm)
setdata(nm,rn)

  class Student 
  {
    private int rollno;
    private String name;
    public void showData()
    {
        System.out.println("RollNo is "+rollno);
        System.out.println("Name is "+name);
    }
    public void setData(int rn,String nm)
    {
        rollno = rn;
        name = nm;
    }
    public void setData(String nm,int rn)
    {
        rollno = rn;
        name = nm ;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Student a = new Student();
        Student b = new Student();
        a.setData(4117,"Amit Jain");
        b.setData("Seeta Rathi",3012);
        a.showData();
        b.showData();
    }
  }

RollNo is 4117
Name is Amit Jain 
RollNo is 3012 
Name is Seeta Rathi

#Program to create 2 circle a (radius=5) , b ( radius=2.5 ) .Display area.

Design a class Circle

Data members

radius

Member Functions

Area()
setRadius(n) -int
setRadius(n) -double

  class Circle
  {
    private double R;
    public void area()
    {
        double A=3.14*R*R;
        System.out.println("Area is "+A);
    }
    public void setRadius(int n)
    {
        R = n;
    }
    public void setRadius(double n)
    {
        R = n;
    }
  }
  class demo
  {
    public static void main(String args[])
    {
        Circle a = new Circle();
        Circle b = new Circle();
        a.setRadius(5);
        b.setRadius(2.5);
        a.area();
        b.area();
    }
  }

Area is 78.5
Area is 19.625

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

Member functions

Method Overloading