//NOTE THE FOLLOWING:
// try{} must always be followed with catch{} and/or finally{}
// finally is a statement that is always executed - whether an exception is handled or if the program crashes
// ArithmeticException will occur on line 26 and line 44 
// line 26: The program recovers from an ArithmeticException due to the try/catch handler
// line 51 : An exception (ArithmeticException) can also be caught by its parent (RuntimeException) or grandparent (Exception) classes 
// line 80 : An exception (FileNotFoundException) can also be caught by its parent (IOException) or grandparent (Exception) classes 
// e.getMessage() prints the type of exception to the console screen
// e.printStackTrace() prints the sequence of methods that were executed from start of the program untill the occurence of the exception
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.FileReader;
public class ExceptionHandling2 {
    public static void main(String args[]){ 
        System.out.println ("Starting Main Method");
        m1();
        m2();
        m3();
        System.out.println ("Ending Main Method");
    }

    public static void m1(){ 
        System.out.println("Start of method m1");
        int x = 10;
        int y = 0;
        double z = 0;
        try{
            z = x/y; // line 32
            System.out.println ("The answer, z = " + z);
        }
        catch(ArithmeticException e){
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        finally{
            System.out.println ("Printing finally -m1");
        }
        System.out.println("End of method m1" + "\n");
    }

    public static void m2(){ 
        System.out.println("Start of method m2");
        int x = 10;
        int y = 0;
        double z = 0;
        try{
            z = x/y; // line 51
            System.out.println ("The answer, z = " + z);
        }
        catch(ArithmeticException e){
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        catch(RuntimeException e){ // line 58
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        catch(Exception e){ // line 62
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        finally{
            System.out.println ("Printing finally -m2");
        }
        System.out.println("End of method m2" + "\n");
    }

    public static void m3(){ 
        System.out.println("Start of method m3");
        Scanner scan = new Scanner (System.in);
        System.out.println ("Input file name to read");
        String name = scan.nextLine();
        File file = new File(name);

        try{
            FileReader reader = new  FileReader (file); // Line 80
            BufferedReader br = new BufferedReader(reader);
            String st = "";
            while (st != null){
                st = br.readLine();
                if (st != null){
                    System.out.println (st);
                }
            }
        }
        catch(FileNotFoundException e){
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        catch(IOException e){ // line 92
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        catch(Exception e){ // line 96
            System.out.println ("e.getMessage = " + e.getMessage());
            e.printStackTrace();
        }
        finally{
            System.out.println ("Printing finally -m3");
        }
        System.out.println("End of method m3" + "\n");
    }

}