Calculating Fibonacci
Series
public class MainClass
{
public static long fibonacci(long number)
{
if ((number == 0) || (number == 1))
return number;
else
return fibonacci(number - 1) + fibonacci(number - 2);
}
public static void main(String[] args)
{
for (int counter = 0; counter <= 10; counter++)
{
System.out.printf("Fibonacci of %d is: %d\n",
counter, fibonacci(counter));
}
}
}
Calculating Factorial
public class MainClass
{
public static void main(String args[])
{
for (int counter = 0; counter <= 10; counter++)
{
System.out.printf("%d! = %d\n", counter,
factorial(counter));
}
}
public static long factorial(long number)
{
if (number <= 1)
return 1;
else
return number * factorial(number - 1);
}
}
Method Overriding
public class Findareas
{
public static void main (String []agrs)
{
Figure f= new Figure(10 , 10);
Rectangle r= new Rectangle(9 , 5);
Figure figref;
figref=f;
System.out.println("Area is :"+figref.area());
figref=r;
System.out.println("Area is :"+figref.area());
}
}
class Figure
{
double dim1;
double dim2;
Figure(double a , double b)
{
dim1=a;
dim2=b;
}
Double area()
{
System.out.println("Inside area for figure.");
return(dim1*dim2);
}
}
class Rectangle extends Figure
{
Rectangle(double a, double b)
{
super(a ,b);
}
Double area()
{
System.out.println("Inside area for rectangle.");
return(dim1*dim2);
}
}
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