Question

Days

Given the poem:

Thirty days hath September
April, June, and November
All the rest have thirty-one
with February's 28 to make it fun.
Leap Year happening one in four, Gives February one day more.

Write a program that does the following:

1. Prompts the user for a month string (January, February, ...). Validate the input month string against an array of month's, and prompt the user again if the String entered is not a valid month. Note: You may want to use an Enum.

2. Prompts the user for a year (e.g. 2016).  

3. For months with 31 days, output the phrase "all the rest have thirty-one". For September, the phrase "Thirty days hath September". For April, June, and November the phrase "April, June, and November". For February, if the year is not a leap year, output the phrase "with February's 28 to make it fun.". If the use did supply a leap year (and the user supplied February as the month), output the phrase "Leap Year happening one in four, Gives February one day more."

4.Note. Since this chapter covers Arrays and ArrayList objects, I expect your solution to utilize these facilities. The specifics of this is up to you (after all, this is your program :) ), so I am making specific requirements regarding this, other than you show learnings from chapter 7.

Please make sure you comment your code thoroughly. You are expected to use javadoc comments at the top of your code and above every method other than main. Refer to examples in the text or research javadoc on line if you have questions.

The code should be nicely formatted and should use proper variables.

Use switch statement not an else if statement.

Answer 1

OUTPUT

CODE

import java.io.*;

import java.lang.*;

import java.util.*;

class YearPoem {

    /*

     * if you don't want to use enum then the following lines(10-21) of code can be

     * ignored. these lines are only if you want to use enum

     */

    public static enum monthEnum {

        January, February, March, April, May, June, July, August, September, October, November, December

    }

    public static boolean contains(String test) {

        for (monthEnum type : monthEnum.values()) {

            if (type.name().equals(test)) {

                return true;

            }

        }

        return false;

    }

    public static boolean checkLeapYear(int year) {

        boolean isLeap = false;

        if (year % 4 == 0) {

            if (year % 100 == 0) {

                if (year % 400 == 0)

                    isLeap = true;

                else

                    isLeap = false;

            } else

                isLeap = true;

        } else {

            isLeap = false;

        }

        return isLeap;

    }

    public static void main(String[] args) throws Exception {

        System.out.println("Enter Month");

        Scanner sc = new Scanner(System.in);

        /*

         * if you eant to use array and list objects then use the following lines(46-53)

         * of code

         */

        String[] monthArray = { "January", "February", "March", "April", "May", "June", "July", "August", "September",

                "October", "November", "December" };

        String month = sc.next();

        List monthList = Arrays.asList(monthArray);

        while (monthList.contains(month) == false) {

            System.out.println("Enter Month Again");

            month = sc.next();

        }

        /*

         * if you want to use enum then use this part of the code lines(60-64) and the

         * lines (10-21) where the enum is created and a function to check month

         * validity is written.This uses the method contains on the enum monthEnum to

         * check if month is contained in the enum

         */

        // while (contains(month) == false) {

        // System.out.println("Enter Month Again");

        // month = sc.next();

        // }

        System.out.println("Enter Year");

        int year = sc.nextInt();

        sc.close();

        switch (month) { // switvh case used

            case "January":

                System.out.println("All the rest have thirty-one");

                break;

            case "February":

                if (checkLeapYear(year)) {

                    System.out.println("Leap Year happening one in four, Gives February one day more.");

                } else {

                    System.out.println("With February's 28 to make it fun.");

                }

                break;

            case "March":

                System.out.println("All the rest have thirty-one");

                break;

            case "April":

                System.out.println("April, June, and November");

                break;

            case "May":

                System.out.println("All the rest have thirty-one");

                break;

            case "June":

                System.out.println("April, June, and November");

                break;

            case "July":

                System.out.println("All the rest have thirty-one");

                break;

            case "August":

                System.out.println("All the rest have thirty-one");

                break;

            case "September":

                System.out.println("Thirty days hath September");

                break;

            case "October":

                System.out.println("All the rest have thirty-one");

                break;

            case "November":

                System.out.println("April, June, and November");

                break;

            case "December":

                System.out.println("All the rest have thirty-one");

                break;

        }

    }

}