To find the area and perimeter of the circle - Java Code

//AREA OF THE CIRCLE:
import java.io.*;
class CircleArea
{
public static void main(String[] args)
{
int r=0;
try
{
InputStreamReader ir=new InputStreamReader(System.in);
BufferedReader br1 = new BufferedReader(ir);
System.out.println("Enter Radius of Circle : ");
r = Integer.parseInt(br1.readLine());
double area = java.lang.Math.PI*r*r;
System.out.println("Area of Circle : "+area);
double perimeter =2*java.lang.Math.PI*r ;
System.out.println("Perimeter of Circle : "+perimeter);
}
catch(Exception e)
{
System.out.println("Error : "+e);
}
}
}