package example6_3_ExceptionTypes;

import javax.swing.JOptionPane;

public class ExceptionTypes {
//    public static void main(String[] args) {
//        int theInteger = 0;
//        String message = "Please enter an integer: ";
//        while(theInteger == 0) {
//            String line = JOptionPane.showInputDialog(message);
//            try {
//                theInteger = Integer.parseInt(line);
//                helperMethod();
//            } catch (RuntimeException e) {
//                message = "Helper method acting up.  Please re-enter an integer";
//            }
//        }
//
//
//    }

    public static void main(String[] args) {
        int square;
        try {
            square = helperMethod();
        } catch (NumberFormatException e) {
            square = 7; // "default value"
        }
        JOptionPane.showMessageDialog(
                null, "Thanks! Squared, that is: "+square);

        System.out.println("We reached the end of the program");
    }

    public static int helperMethod() throws NumberFormatException {
        System.out.println("We reached the beginning of the helperMethod");
        try {
            helpersHelper();
        } catch(MyException e) {
            String message = "The \"helper\" " +
                    "method is up to trouble again! He says:" +
                    e.getMessage();
            System.out.println(message);
            JOptionPane.showMessageDialog(null, message);
            e.printStackTrace();
        }

        String message = "Please enter an integer: ";
        String line = JOptionPane.showInputDialog(message);
        int theInteger = Integer.parseInt(line);
        int square = theInteger * theInteger;
        System.out.println("We reached the end of the helperMethod");
        return square;
    }

    public static void helpersHelper() throws MyException {
        if(Math.random() > 0.00001) {
            //throw new RuntimeException("Ha!");
            throw new MyException("Ha!"); //"Ha!"
        }
    }


}