/* Chapter 3 Programming Activity 2
   Calling class methods
   Anderson, Franceschi
*/

// ***** add your import statements here
import java.util.Scanner;
import java.util.Calendar;
import java.text.NumberFormat;
import java.text.DecimalFormat;

public class PracticeMethods
{
  public static void main( String [] args )
  {
    //*****
    // 1.  a. Create a Scanner object to read from the console
   //     b. Prompt the user for their first name
   //     c. Print a message that says hello to the user
   //     d. Print a message that says how many letters
   //               are in the user's name
   // Your code goes here
	Scanner scan = new Scanner(System.in);
	System.out.println ("Please enter your first name");
	String first = scan.next();
	System.out.println ("Hello " + first);
	System.out.println (first.length());

   //*****
   // 2.  a. Skip a line, then prompt the user for the year
   //            they were born.
   //     b. Calculate and print the age the user will be this year.
   //     c. Declare a constant for average life expectancy,
   //            set its value to 76.9
   //     d. Print a message that tells the user the percentage
   //            of their expected life they've lived.
   //       Use the DecimalFormat class to format the percentage
	System.out.println();
	System.out.println("Please enter the year of your birth");
	Calendar now = Calendar.getInstance();
	int year = scan.nextInt();
	int age = now.get(now.YEAR) - year;
	System.out.println ("Your age is " + age );
	final double lifeExpectancy = 76.9;
	double used = age/lifeExpectancy;
	NumberFormat pct = NumberFormat.getPercentInstance();
	System.out.println("You've used up " + pct.format(used) + " of your life");
	DecimalFormat percnt = new DecimalFormat ("##0.00%");
	System.out.println("or more precisely " + percnt.format(used) + " to 2 places");
     //*****
     // 3.  a. Generate a random integer between 1 and 20
     //     b. Skip a line, then print a message that you're
     //           thinking of a number between 1 and 20
     //           and that you'll tell them the number in 5 seconds
     //     c. Wait five seconds by calling the
     //           wait method in the prewritten Pause class.
     //           The wait method has this API:
     //               public static void wait( int secondsToWait )
     //           The authors have written this class and included in
     //           the same directory as this file, so an import
     //           statement is not needed.
     //     d. Print a message that tells the user the number.
	  	final int last = 20; final int start = 1;
		double Rand = Math.random()*(last - start) + start;
		int R = (int) Rand;
		System.out.println("I'm thinking of a number between 1 and 20. Wait 5 seconds");
		Pause.wait(5);
		System.out.println(R);
   }
}