/* This program demonstrates the switch statement and a few String methods */
import java.util.Scanner;
class JohnCena
{
	public static void main(String [] args)
	{
		Scanner input = new Scanner(System.in);
		
		/* Here, we read in the day of the week as text, and print out the numeric equivalent.
     		 * We start off from Monday. So, Monday = 1, Tuesday = 2, ...
		 * Also, the switch statement uses String.equals() internally, so the string have to match entirely 
		 * (including uppercase and lowercase letters, for a case to be triggered. "Monday" is not the same as "monday".
		 */
		System.out.println("Please enter the day of the week :");
		String day = input.next(); // read in the day of the week as a String
		
		switch(day)
		{
			case "Monday" : System.out.println("Monday is 1");
							break; //break statements prevent the cases from "falling through".
			case "Tuesday" : System.out.println("Tuesday is 2");
							break;
			case "Wednesday" : System.out.println("Wednesday is 3");
							break;
			case "Thursday" : System.out.println("Thursday is 4");
							break;
			case "Friday" : System.out.println("Friday is 5");
							break;
			case "Saturday" : System.out.println("Saturday is 6");
							break;
			case "Sunday" : System.out.println("Sunday is 7");
							break;
			default:	System.out.println("Invalid entry."); 
					//default case is triggered when the variable "day", doesn't match any of the above cases.
							
		}

		/* In this part of the program, we read in two strings as firstName and lastName, 
		 * and compare them to figure out which one is is first alphabetically.
		 * We use the String.compareTo method, which goes through the two strings letter by letter,
		 * subtracting the ASCII value of the second from the first, until a non zero value is encountered or 
		 * one or both of the strings terminates.
  		 */

		/* And I figured out why the Scanner.nextLine() was all haywire. Yaay.
		 * next(), or nextFoo() (nextInt(), nextDouble(), etc) do not consume whitespace. 
		 * nextLine() consumes the trailing newline, but not the preceding newline.
		 * So, the newline after reading in the day of the week is still on the stream.
		 * When we read in the next string, the nextLine() stops there.
		 * Oracle is of the opinion that this is a feature, not a bug :P
		 * So, we just read in the preceding newline into a dummy string and discard it.
		 * That is what the next line does.
		 * TL; DR: If you want to use nextLine(), and the previous read was anything other than a nextLine(), 
			use the line below before you do any further reads.
		 */
		String junk = input.nextLine();

		String firstName,lastName;
		
		System.out.println("Enter first name :");
		firstName = input.nextLine();
		System.out.println("Enter last name :");
		lastName = input.nextLine();
		
		// should be fairly self explanatory.
		if(firstName.compareTo(lastName)<0)
			System.out.println(firstName+" is alphabetically first.");
		else if(firstName.compareTo(lastName)>0)
			System.out.println(lastName+" is alphabetically first.");
		else System.out.println("You first name is the same as your last name.");
	}
}