/* From: "COMPUTATIONAL PHYSICS, 2nd Ed" 
   by RH Landau, MJ Paez, and CC Bordeianu 
   Copyright Wiley-VCH, 2007.
   Electronic Materials copyright: R Landau, Oregon State Univ, 2007;
   MJ Paez, Univ Antioquia, 2007; and CC Bordeianu, Univ Bucharest, 2007.
   Support by National Science Foundation                           
*/
// FileCatchThrow.java:  throw, catch IO exception 

import java.io.*;

public class FileCatchThrow{   

	public static void main(String[] argv)    {           // Begin main
		
    double r, circum, A, PI = 3.141593;            // Declare, assign
		
    r = 2;
    circum = 2.* PI* r;                           // Calculate circum
    A = Math.pow(r,2) * PI;                            // Calculate A
    try { 
		  PrintWriter q = new PrintWriter(
			            new FileOutputStream("FileThrowCatch.out"), true);
      q.println("r = " + r + ", length, A = " + circum + ", " +A);}  
      catch(IOException ex){ 
      ex.printStackTrace(); }                                // Catch
  }
}