Answer Posted / amol nakhwa

/*
Save this file as "TestCircle.java"
*/



class NegativeRadiusNotAllowedException extends Exception
{
public String getMessage()
{
return "Radius should be positive number only!";
}
}

class Circle
{
public void calculateArea(int rad) throws
NegativeRadiusNotAllowedException
{
if (rad < 0)
{
throw new NegativeRadiusNotAllowedException();
}
double ar = 3.1415*rad*rad;
System.out.println("Circle Radius = "+ rad + " and Area =
"+ar);
}
}



public class TestCircle
{
public static void main (String args[])
{
Circle c = new Circle();

try
{
//int no1 = Integer.parseInt(args[0]);
//int no2 = Integer.parseInt(args[1]);
c.calculateArea(9);
c.calculateArea(-9);
}
catch (NegativeRadiusNotAllowedException e)
{
System.out.println(e.getMessage());
}
catch (NumberFormatException e1)
{
System.out.println(e1.getMessage() +" is not a valid
integer");
}
catch (Exception e2)
{
System.out.println(e2.getMessage());
}
}
}

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