Here is my code: public class CalendarAssignment { /** * Error to output if year
ID: 3937164 • Letter: H
Question
Here is my code:
public class CalendarAssignment {
/**
* Error to output if year is not positive
*/
static final String E_YEAR = "The year must be positive!";
/**
* Error to output if the day is not between 0 and 6
*/
static final String E_DAY = "The day of January 1st must be between 0 and 6!";
/**
* Determines if an input is a leap year
*
* @param year
* year in question
* @ereturn true if a leap year
*/
public static boolean isLeapYear( int year ) {
boolean leapyear = false;
if ( year % 4 == 0 ) {
if ( year % 100 == 0 ) {
if ( year % 400 == 0 ) {
return !leapyear;
};
} else {
return !leapyear;
}
}
return leapyear; // TODO: replace with your code
}
/**
* Outputs a month to the console
*
* @param month
* title
* @param startDay
* 0=Sunday ... 6=Saturday
* @param numDays
* number of days in the month
* @return day of the week of the last day of the month
*/
public static int printMonth( String month, int startDay, int numDays ) {
System.out.println( month );
int nextLine = 1;
for (int j = numDays, s = 1; j > 0; ) {
if (startDay >= 1 ) {
for ( int i = 0; i < startDay; i++ ) {
System.out.print(" ");
nextLine++;
}
startDay = 0;
} else {
if ( s < 10 )
System.out.print( " " + s );
if ( s >= 10 )
System.out.print( " " + s );
nextLine++;
j--;
s++;
}
if (nextLine > 7) {
System.out.println( "" );
nextLine = 1;
}
}
return nextLine-1;
}
/**
* Program execution point: input year, day of the week (0-6) of january 1
* output calendar for that year
*
* @param args
* command-line arguments (ignored)
*/
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter the year: ");
int year = input.nextInt();
System.out.print("Enter the day of the week of January 1st (0=Sunday, 1=Monday, ... 6=Saturday): ");
int firstDay = input.nextInt();
if (year<=0) {
System.out.println("The year must be positive!");
System.exit(0);
}
if (firstDay<0 || firstDay>6) {
System.out.println("The day of January 1st must be between 0 and 6!");
System.exit(0);
}
int numFebDays;
if (isLeapYear(year)) {
numFebDays = 29;
} else {
numFebDays = 28;
}
int lastDayOfWeek;
lastDayOfWeek = printMonth("January", firstDay, 31);
System.out.println();
lastDayOfWeek = printMonth("February", lastDayOfWeek, numFebDays);
System.out.println();
lastDayOfWeek = printMonth("March", lastDayOfWeek, 31);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("April", lastDayOfWeek, 30);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("May", lastDayOfWeek, 31);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("June", lastDayOfWeek, 30);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("July", lastDayOfWeek, 31);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("August", lastDayOfWeek, 31);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("September", lastDayOfWeek, 30);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("October", lastDayOfWeek, 31);
System.out.println();
lastDayOfWeek = printMonth("November", lastDayOfWeek, 30);
System.out.println();
System.out.println();
lastDayOfWeek = printMonth("December", lastDayOfWeek, 31);
System.out.println();
System.out.println();
}
}
Any help would be greatly appreciated. Thanks!!
Explanation / Answer
package org.students;
import java.util.Scanner;
import com.sun.org.apache.bcel.internal.generic.IUSHR;
public class Calander {
//declaring static variables
static final String E_YEAR = "The year must be positive!";
static final String E_DAY = "The day of January 1st must be between 0 and 6!";
public static void main(String[] args) {
//Declaring variables
int getFirstDay;
int year;
Scanner scanner = new Scanner(System.in);
//This while loop continue to execute until user enters valid year
while (true) {
//Getting the year entered by the user
System.out.print("Enter the year: ");
year = scanner.nextInt();
if (year < 0) {
System.out.println(E_YEAR);
} else
break;
}
//This loop continue to execute until user enters valid first day of the month
while (true) {
//Getting the first day entered by the user
System.out.print("Enter 1st day of year ( 0 = Sunday, 6 = Satuday ): ");
getFirstDay = scanner.nextInt();
//Checking whether the first day is within valid range or not
if (getFirstDay < 0 || getFirstDay > 6) {
System.out.println(E_DAY);
continue;
} else
break;
}
for (int month = 1; month <= 12; month++) {
int days = 0;
String monthName = " ";
switch (month) {
case 1:
monthName = "January";
days = 31;
break;
case 2:
monthName = "February";
if (isLeapYear(year)) {
days = 29;
} else {
days = 28;
}
break;
case 3:
monthName = "March";
days = 31;
break;
case 4:
monthName = "April";
days = 30;
break;
case 5:
monthName = "May";
days = 31;
break;
case 6:
monthName = "June";
days = 30;
break;
case 7:
monthName = "July";
days = 31;
break;
case 8:
monthName = "August";
days = 31;
break;
case 9:
monthName = "September";
days = 30;
break;
case 10:
monthName = "October";
days = 31;
break;
case 11:
monthName = "November";
days = 30;
break;
case 12:
monthName = "December";
days = 31;
break;
default:
System.out.print("Invalid Month.");
System.exit(0);
break;
}
System.out.println(" " + monthName + " " + year);
int i = 0;
int firstDay = 0;
switch (month) {
case 1:
firstDay = getFirstDay;
break;
case 2:
firstDay = getFirstDay + 3;
break;
case 3:
firstDay = getFirstDay + 3;
break;
case 4:
firstDay = getFirstDay + 6;
break;
case 5:
firstDay = getFirstDay + 8;
break;
case 6:
firstDay = getFirstDay + 11;
break;
case 7:
firstDay = getFirstDay + 13;
break;
case 8:
firstDay = getFirstDay + 16;
break;
case 9:
firstDay = getFirstDay + 19;
break;
case 10:
firstDay = getFirstDay + 21;
break;
case 11:
firstDay = getFirstDay + 24;
break;
case 12:
firstDay = getFirstDay + 26;
break;
}
if (isLeapYear(year)) {
switch (month) {
case 1:
firstDay = getFirstDay;
break;
case 2:
firstDay = getFirstDay + 3;
break;
case 3:
firstDay = getFirstDay + 4;
break;
case 4:
firstDay = getFirstDay + 7;
break;
case 5:
firstDay = getFirstDay + 9;
break;
case 6:
firstDay = getFirstDay + 12;
break;
case 7:
firstDay = getFirstDay + 14;
break;
case 8:
firstDay = getFirstDay + 17;
break;
case 9:
firstDay = getFirstDay + 20;
break;
case 10:
firstDay = getFirstDay + 22;
break;
case 11:
firstDay = getFirstDay + 25;
break;
case 12:
firstDay = getFirstDay + 27;
break;
}
}
printMonth(month, firstDay, days);
System.out.println();
}
}
//This method checks whether the year is leap year or not
private static boolean isLeapYear(int year) {
boolean bool = false;
if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0))
bool = true;
else
bool = false;
return bool;
}
//This method will display the month
public static void printMonth(int month, int startDay, int numDays) {
int dayOfWeek = 0;
System.out.println("_______________________________");
System.out.println(" Sun Mon Tue Wed Thu Fri Sat");
if ((startDay % 7) >= 0) {
if ((startDay % 7) == 0) {
dayOfWeek = 0;
} else if ((startDay % 7) == 1) {
dayOfWeek = 1;
System.out.print(" ");
} else if ((startDay % 7) == 2) {
dayOfWeek = 2;
System.out.print(" ");
} else if ((startDay % 7) == 3) {
dayOfWeek = 3;
System.out.print(" ");
} else if ((startDay % 7) == 4) {
dayOfWeek = 4;
System.out.print(" ");
} else if ((startDay % 7) == 5) {
dayOfWeek = 5;
System.out.print(" ");
} else if ((startDay % 7) == 6) {
dayOfWeek = 6;
System.out.print(" ");
}
}
for (int i = 1; i <= numDays; i++) {
if (i < 10)
System.out.print(" " + i);
else
System.out.print(" " + i);
if ((i + startDay) % 7 == 0)
System.out.println();
}
}
}
_________________________________
Output:
Enter the year: 2016
Enter 1st day of year ( 0 = Sunday, 6 = Satuday ): 5
January 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
February 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29
March 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
April 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
May 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31
June 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30
July 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
August 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
September 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30
October 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31
November 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30
December 2016
_______________________________
Sun Mon Tue Wed Thu Fri Sat
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
_________________Thank You
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.