I am posting this code up for review and debugging. This source code is for Java, and is meant to give you the exact day of the week from an entered date.
Review
- This program seems to have 2 case statements. Would it have made sense to use an enum variable to eliminate the second case statement?
- How about restructuring my entire program to include one super class and a sub class?
- Are these approach a good idea to shorten my code, or is my original code the best approach to my program's purpose?
Debugging
Please feel free to test this program out, and reply with any incorrect output given from this code. I have tested this program with various dates and have gotten the correct output. However, it is always a good idea to have more eyes test this code out.
Program Purpose:
Enter any date from the 1800 to the present day, and this program will display the day of the week from the date entered.
Example:
If a user entered "July 2 , 1985". This program will return "Tuesday", which was the day of the week that on "July 2, 1985".
// Import Libraries
import javax.swing.*;
import java.util.*;
import java.io.*;
// This is my program.
public class DateCalc
{
public static void main (String[] args)
{
String month;
String day;
String inputYear;
Scanner keyboard = new Scanner(System.in);
// receiving input for my age variable
System.out.print( " \n \n Please Enter The Month Of The Date :");
month = keyboard.nextLine();
// receiving input for my weight variable
System.out.print( " \n Please Enter The Day Of The Date : ");
day = keyboard.nextLine();
// receiving input for my height variable
System.out.print( " \n Please Enter The Year OF The Date : ");
inputYear = keyboard.nextLine();
String stringYear = ""+ inputYear.charAt(inputYear.length()-2) + inputYear.charAt(inputYear.length()-1);
int year = Integer.parseInt(stringYear);
int intDay = Integer.parseInt(day);
switch(month.toLowerCase())
{
case "january" :
int janKey = 1;
results (day , inputYear, month, year, intDay, janKey);
break;
case "february":
int febKey = 4;
results (day , inputYear, month, year, intDay, febKey);
break;
case "march":
int marKey = 4;
results (day , inputYear, month, year, intDay, marKey);
break;
case "april":
int aprKey = 0;
results (day , inputYear, month, year, intDay, aprKey);
break;
case "may":
int maykey = 2;
results (day , inputYear, month, year, intDay, maykey);
break;
case "june":
int junKey = 5;
results (day , inputYear, month, year, intDay, junKey);
break;
case "july":
int julKey = 0;
results (day , inputYear, month, year, intDay, julKey);
break;
case "august":
int augKey = 3;
results (day , inputYear, month, year, intDay, augKey);
break;
case "september":
int septKey = 6;
results (day , inputYear, month, year, intDay, septKey);
break;
case "october":
int octKey = 1;
results (day , inputYear, month, year, intDay, octKey);
break;
case "november":
int novKey = 4;
results (day , inputYear, month, year, intDay, novKey);
break;
case "december":
int decKey = 4;
results (day , inputYear, month, year, intDay, decKey);
break;
// IN MY DEFUALT CASE " inputValidation " WILL BE EXECUTED
default:
JOptionPane.showMessageDialog(null," Invalid Entry Please Try Again " );
}
}
public static void results ( String day , String inputYear, String month, int year, int intDay, int key )
{
int quarter = year / 4;
int sum = year + quarter + intDay + key;
System.out.println(" \n\n\n\n\n\n\n\n\n\n\n\n");
System.out.println("*********************************************************************** ");
System.out.println("*********************** Result ********************************** ");
System.out.println("*********************************************************************** ");
System.out.println( " \n\n\t\t Date Entered Was : " );
System.out.println(" \n \t \t " + month + " "+ day + " , " + inputYear );
System.out.println( " \n\n Last Two Digits Of The Year Were : ........ " + year);
System.out.println( " \n One Quarter Of Last Two Digits : ........ " + quarter);
System.out.println( " \n The Given Day Of The Month Entered : ........ " + day);
System.out.println( " \n The Index Key Of This Month : ........ " + key);
System.out.println( " \n The Sum Of All The Numbers Above Is : ........ " + sum);
dayLookUp(sum);
String weekDay = dayLookUp(sum);
System.out.println( " \n \n \t The Day Of The Week Was : ........ " + weekDay);
}
public static String dayLookUp ( int sum )
{
String weekDay;
String error = " \n \n Please Check Your Dates And Try Again " ;
int day = sum % 7;
switch(day)
{
case 1 :
weekDay = " Sunday ";
return weekDay;
case 2:
weekDay = " Monday ";
return weekDay;
case 3:
weekDay = " Tuesday ";
return weekDay;
case 4:
weekDay = " Wednesday ";
return weekDay;
case 5:
weekDay = " Thursday ";
return weekDay;
case 6:
weekDay = " Friday ";
return weekDay;
case 7:
weekDay = " Saturday ";
return weekDay;
// IN MY DEFUALT CASE " inputValidation " WILL BE EXECUTED
default:
JOptionPane.showMessageDialog(null," Invalid Entry Please Try Again " );
return error;
}
}
}
