// This is a simple test of Exceptions. The program reads input
// from the user, and prints error messages until the input is an
// integer between 25 and 75 inclusive
//
// File: ExceptionTest.java
// Author: Benjamin Lewis
// Last modified: Tuesday February 23, 1999


import java.io.*;

public class ExceptionTest
{
  public static void main(String[] args)
  {
    BufferedReader instream =
      new BufferedReader(new InputStreamReader(System.in));
    int    inputInt = 0;
    boolean inputOK = false;

    System.out.println("Input an integer from 25 to 75");
    while (!inputOK)
    {
      try
      {
	inputOK = true; // assume the input is ok until proven wrong
	System.out.print("> "); // cute little prompt
	inputInt = Integer.parseInt(instream.readLine());
	processInput(inputInt);
      }
      catch (NumberFormatException nfe)
      {
	System.out.println("Not a valid integer!");
	inputOK = false;
      }
      catch (OutOfRangeException ore)
      {
	System.out.println(ore.getMessage());
	inputOK = false;
      }
      catch (IOException ioe)
      {
	// this shouldn't happen
	System.err.println("Uh oh, an IOException: "+ioe.getMessage());
	System.exit(0);
      }
    }
    System.out.println("The input "+inputInt+" is valid");
  }

  public static void processInput(int input)
    throws OutOfRangeException
  {
    if (input > 75)
    {
      throw new OutOfRangeException("Too High!");
    }
    if (input < 25)
    {
      throw new OutOfRangeException("Too Low!");
    }

    // in a real application one would actually do something with the
    // input here.
  }
}

// lets create our own exception to handle the out of range cases
class OutOfRangeException extends Exception
{
  public OutOfRangeException(String message)
  {
    super(message);
  }
}