Define an interface “IntOperations” with methods to check whether an integer is positive, negative, even, odd, prime and operations like factorial and sum of digits. Define a class MyNumber having one private int data member. Write a default constructor to initialize it to 0 and another constructor to initialize it to a value (Use this). Implement the above interface. Create an object in main. Use command line arguments to pass a value to the object and perform the above operations using a menu.

Name : Shreyal Mandot

Title : Assignment 3 setA 2. Define an interface “IntOperations” with methods to check whether an integer is positive, negative, even, odd, prime and operations like factorial and sum of digits. Define a class MyNumber having one private int data member. Write a default constructor to initialize it to 0 and another constructor to initialize it to a value (Use this). Implement the above interface. Create an object in main. Use command line arguments to pass a value to the object and perform the above operations using a menu.



import java.io.* ;

interface IntOperations
{

public void isPositiveNegative() ;
public void isEvenOdd() ;
public void isPrime() ;
public void factorial() ;
public void sumOfDigits() ;

}

class ass3a2 implements IntOperations
{
private int number ;


ass3a2()
{

this.number=0 ;

}


ass3a2(int num)
{

this.number=num ;

}

public void isPositiveNegative()
{

if(this.number<0)
System.out.println("\nNumber Is Negetive...") ;

else
System.out.println("\nNumber Is Positive...") ;

}

public void isEvenOdd()
{

if(this.number%2==0)
System.out.println("\nNumber Is Even...") ;

else
System.out.println("\nNumber Is Odd...") ;

}

public void isPrime()
{

int i = 2 ;

while(i!=this.number)
{

if(this.number%i==0)
{

System.out.println("\nNumber Is Not Prime...") ;
break ;

}
i++ ;

}

if(this.number==i)
System.out.println("\nNumber Is Prime...") ;

}

public void factorial()
{

int prod=1 , i=1 ;

while(i<=this.number)
prod*=i++ ;

System.out.println("\nFactorial Of Number Is : "+prod) ;

}

public void sumOfDigits()
{

int sum=0 ;
int i=this.number ;

while(i!=0)
{

sum+=(i%10) ;
i=i/10 ;

}

System.out.println("\nSum Of The Digits Is : "+sum) ;

}

public static void main(String[] arg) throws Exception
{

int num = Integer.parseInt(arg[0]) , choice ;
ass3a2 o = new ass3a2(num) ;
BufferedReader b = new BufferedReader(new InputStreamReader(System.in)) ;

while(true)
{

System.out.println("\n==========Menu========") ;
System.out.println("\n1.Positive or Negative") ;
System.out.println("\n2.Even or Odd") ;
System.out.println("\n3.Prime") ;
System.out.println("\n4.Factorial") ;
System.out.println("\n5.Sum of digits") ;
System.out.println("\n6.Exit") ;
System.out.println("\n======================") ;

System.out.println("\nEnter your choice here : ") ;
choice = Integer.parseInt(b.readLine()) ;

switch(choice)
{

case 1:
o.isPositiveNegative() ;
break ;

case 2:
o.isEvenOdd() ;
break ;

case 3:
o.isPrime() ;
break ;

case 4:
o.factorial() ;
break ;

case 5:
o.sumOfDigits() ;
break ;

case 6:
System.exit(0) ;
break ;

default:
System.out.println("Invalid choice.\nEnter again :") ;
break ;

}

}

}

}


/*

Output-


[prady@localhost setA]$ javac ass3a2.java
[prady@localhost setA]$ java ass3a2 15

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
1

Number Is Positive...

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
2

Number Is Odd...

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
3

Number Is Not Prime...

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
4

Factorial Of Number Is : 2004310016

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
5

Sum Of The Digits Is : 6

==========Menu========

1.Positive or Negative

2.Even or Odd

3.Prime

4.Factorial

5.Sum of digits

6.Exit

======================

Enter your choice here :
6
[prady@localhost setA]$


*/