Mumbai University > Information Technology > Sem 3 > Object Oriented Programming Methodology

Marks: 10M

Year: Dec 2015

import java.io.*; interface Shape //interface { 
{ 
float fPi=3.14f; 
public void fnRead(); 
public void fnArea(); 
public void fnShow(); 

class Rectangle implements Shape //implementation class 
int iLength, iBreadth; float ,Area; 
public void fnRead() 
DatalnputStream d=new DatalnputStream(System.in); 
try 
{
System.out.print("Enter the length : ");
 iLength=Integer.parseInt(d.readLine()); 
System.out.print("Enter the breadth : ");
 iBreadth=Integer.parseInt(d.readLine()); 
} 
catch(Exception e) 
{
}
 public void fnArea()
{ fArea=iLength*iBreadth; }
 public void fnShow() 
{System.out.println("Area of the rectangle : " + fArea); 
}

class Square implements Shape //implementation class 
int iSide; float, fArea;
 public void fnRead() 
{
try
{ 
DatalnputStream d2=new DatalnputStream(System.in);
 System.out.print("Enter the length of the side: "); 
iSide=Integer.parseInt(d2.1eadLine()); 
} catch(Exception e) {}

 public void fnArea()
{ fArea=iSide*iSide; }
 public void fnShow() 
{
System.out.println("Area of the square: " fArea); 
} 
class Square implements Shape //implementation class 
int iSide; float, fArea;
 public void fnRead() 
{
try
{ 
DatalnputStream d2=new DatalnputStream(System.in);
 System.out.print("Enter the length of the side: "); 
iSide=Integer.parseInt(d2.1eadLine()); 
} catch(Exception e) {}

 public void fnArea()
{ fArea=iSide*iSide; }
 public void fnShow() 
{
System.out.println("Area of the square: " fArea); 
} 
class circle implements Shape //implementation class 
int radius; float, fArea;
 public void fnRead() 
{
try
{ 
DatalnputStream d2=new DatalnputStream(System.in);
 System.out.print("Enter the radius of the circle: "); 
radius=Integer.parseInt(d2.1eadLine()); 
} catch(Exception e) {}

 public void fnArea()
{ fArea=2*float*radius*radius; }
 public void fnShow() 
{
System.out.println("Area of the circle: " fArea); 
} 
class ShapeInterface //main class 
public static void main(String[] a)throws I0Exception 
{
int iChoice; 
Shape sObject; 
String s; DatalnputStream in=new DataInputStream(System.in);
 do 
{
System.out.println("Area Calculation \n"); 
System.out.println("1 --> Rectangle\n2 --> Square\n3 --> circle\n2 --> Exist");
System.out.print("Enter ur choice : "); 
iChoice=Integer.parseInt(in.readLine());
 switch(iChoice) 
{
case 1: 
{
Rectangle rObject=new Rectangle(); 
sObject=rObject; sObject.fnRead();
 sObject.fnArea(); 
sObject.fnShow();
 break; 
} 
case 2: 
{
Square sq0bject=new Square(); 
sObject=sq0bject;
 sObject.fnRead();
 sObject.fnArea();
 sObject.fnShow(); 
break; }
case 3: 
{
circle  crl0bject=new circle(); 
cObject=crl0bject;
 sOcObjectbject.fnRead();
 cObject.fnArea();
 cObject.fnShow(); 
break; }
 case 4:
{ System.exit(0); 
break; } //end of switch
 System.out.println("Do you want to continue? Press y for Yes or Press N for No"); s=in.readLine(); }
while(s.equals("y")); 
} 
}