import javax.swing.*;

public class MethodsPractice
{
	public static void main(String[] args)
	{
		//countToTen();
		//countToNumber(35);

		//countToNumber(getNumberFromUser());
		//Be sure you understand this method call!!!


		////////// METHOD OVERLOADING ///////////////
		//printGreeting();
		//printGreeting("How are you?");
		//printGreeting("Hi", 10);
		//printGreeting("Hi", 10.5); //ERROR!  (Why?)



		System.out.println(getNumBet1and10());

		System.out.println();
		System.exit(1);	//needed to properly "clean up" our program
						//after using JOptionPane
						//System.exit terminates the JVM
	} //end of main method


	//counts from 1 to 10 with a space in between
	public static void countToTen()
	{
		for (int i=1; i<=10; i++)
			System.out.print(i + " ");

		System.out.println("\n");
	}  //end of method countToTen


	//counts from 1 to 'arg'
	public static void countToNumber(int arg)
	{
		for (int i=1; i<=arg; i++)
			System.out.print(i + " ");

		System.out.println("\n");
	}  //end of method countToNumber



	//read integer from user, parse it and return the value
	public static int getNumberFromUser()
	{
		int num;
		String s;
		s = JOptionPane.showInputDialog("Enter an integer number: ");
		num = Integer.parseInt(s);

		return num;
	}


	//reads a double from the user between -10 and +10
	//if the user enters a number outside -10 to +10,
	//keeps prompting the user until they do...
	public static double getNumBet1and10()
	{
		double num;
		String s;
		do
		{
			s = JOptionPane.showInputDialog("Enter a double between -10 and +10:");
			num = Double.parseDouble(s);
		} while (num<-10 || num>10);

		return num;
	} //end of method getNumBet1and10()



	//outputs 'Hello!' and a new line to the screen
	public static void printGreeting()
	{
		System.out.println("Hello!");
		System.out.println();
	}  //end of method printGreeting


	//outputs 'greeting' to the screen
	public static void printGreeting(String greeting)
	{
		System.out.println(greeting);
		System.out.println();
	} //end of printGreeting method


	//outputs 'greeting' to the screen 'n' times
	public static void printGreeting(String greeting, int n)
	{
		for (int i=0; i<n; i++)
			System.out.println(greeting);
		System.out.println();
	} //end of method printGreeting


	//returns numberator/denominator
	//denominator must be a non-zero value
	public static double calcDivision(int numerator, int denominator)
	{
		return (  (double)numberator/denominator  );
	} //end of method calcDivision


} //end of class MethodsPractice


/************************** NOTES   ****************************************
1. All methods have a comment at the top indicating what they do,
   and any "warnings" as to what the method might not be eqipped
   to handle.  (Eg: see calcDivision method).

2. All methods have a comment at the bottom indicating the end

3. All "stand alone" methods must be declared as static
   (explained later)

4. Why was it that I could keep declaring 'i' in the various methods?
   (an important point....)

5. Why did I put the System.exit(0) statement at the end of main?
   Why not at the end of the getNumberFromUser method?

6. Note how the getNumBet1and10() and other methods were never invoked
   from inside main().  This is okay; not all methods have to be invoked.

7. Note the three different versions of the printGreeting method.
   When the method gets invoked, how does the system know which
   of the three to invoke?
****************************************************************************/