![}
else{
int maxDays = temp.maxMonthDays();
noOfDays += (maxDays - temp.day);
temp.day = 0;
if(temp.month == 12) {
temp.month = 1;
temp.year += 1;
}
else
temp.month += 1;
}
} while(!temp.isEqual(other));
return noOfDays;
}
}
/**
* Returns a String representation of this date in year/month/day order, such as "2006/07/22"
*/
@Override
public String toString() {
returnthis.day + DATE_SEPARATOR + this.month + DATE_SEPARATOR + this.year;
}
}
publicclass Driver {
publicstaticvoid main(String[] args) {
Date d1 = new Date(29, 1, 2016);
Date d2 = new Date(29, 12, 2015);
//Add 5 days to d1
System.out.println(" Add 5 days to " + d1 + " : ");
d1.addDays(5);
System.out.println(d1);
//Add 5 days to d2
System.out.println(" Add 5 days to " + d2 + " : ");
d2.addDays(5);
System.out.println(d2);](https://image.slidesharecdn.com/publicclassdateprivatestaticstringdateseparatorpr-230408040510-f49639d8/85/publicclass-Date-privatestatic-String-DATE_SEPARATOR-pr-pdf-6-320.jpg)
![}
/**
* Returns a String representation of this date in year/month/day order, such as "2006/07/22"
*/
@Override
public String toString() {
returnthis.day + DATE_SEPARATOR + this.month + DATE_SEPARATOR + this.year;
}
}
publicclass Driver {
publicstaticvoid main(String[] args) {
Date d1 = new Date(29, 1, 2016);
Date d2 = new Date(29, 12, 2015);
//Add 5 days to d1
System.out.println(" Add 5 days to " + d1 + " : ");
d1.addDays(5);
System.out.println(d1);
//Add 5 days to d2
System.out.println(" Add 5 days to " + d2 + " : ");
d2.addDays(5);
System.out.println(d2);
Date d3 = new Date(28, 8, 2016);
//Add 1 week to d3
System.out.println(" Add 1 week to " + d3 + " : ");
d3.addWeeks(1);
System.out.println(d3);
Date d4 = new Date(31, 8, 2016);
Date d5 = new Date(1, 10, 2016);
System.out.println(" The number of days that " + d4 + " must be adjusted to make it equal to
" + d5 + " : " + d4.daysTo(d5) + " days.");
}
}
SAMPLE OUTPUT :
Add 5 days to 29/1/2016 :
3/2/2016
Add 5 days to 29/12/2015 :](https://image.slidesharecdn.com/publicclassdateprivatestaticstringdateseparatorpr-230408040510-f49639d8/85/publicclass-Date-privatestatic-String-DATE_SEPARATOR-pr-pdf-13-320.jpg)
publicclass Date {privatestatic String DATE_SEPARATOR = ;pr.pdf
- 1. publicclass Date { privatestatic String DATE_SEPARATOR = "/"; privatestaticintDAYS_PER_WEEK = 7; //Attributes privateint day; privateint month; privateint year; /** * Default Constructor * Instantiates an object of type Date to 1/1/2000 */ public Date() { this.day = 1; this.month = 1; this.year = 2000; } /** * Constructs a new date object to represent the given date. * @param day * @param month * @param year */ public Date(int day, int month, int year) { if(isValid(day, month, year)) { this.day = day; this.month = month; this.year = year; } else System.out.println("Invalid Date."); } /** * Returns the day value of this date for example, for the date 2006/07/22, returns 22. * @return */ publicint getDay() {
- 2. return day; } /** * Returns the month value of this date ,for example, for the date 2006/07/22, returns 7. * @return */ publicint getMonth() { return month; } /** * Returns the year value of this date, for example , the date 2006/07/22, returns 2006. * @return */ publicint getYear() { return year; } /** * @param day the day to set */ publicvoid setDay(int day) { this.day = day; } /** * @param month the month to set */ publicvoid setMonth(int month) { this.month = month; } /** * @param year the year to set */ publicvoid setYear(int year) { this.year = year; } /** * Returns true if the year of this date is a leap year.
- 3. * A leap year occurs every 4 years , except for multiples of 100 that are not multiples of 400. * For example, 1956,1844,1600,and 2000 are leap years, but 1983,2002,1700,and 1900 are not. * @return */ publicboolean isLeapYear(){ if(((this.year % 400) == 0) || (((this.year % 4) == 0) && ((this.year % 100) != 0))) returntrue; else returnfalse; } /** * Checks if the date is valid * @param day * @param month * @param year * @return */ publicboolean isValid(int day, int month, int year) { if((month < 1) || (12 < month)) returnfalse; else { if(((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (month == 10) || (month == 12)) && ((day < 1) || (31 < day))) returnfalse; elseif(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && ((day < 1) || (30 < day))) returnfalse; elseif(month == 2) { if(isLeapYear() && ((day < 1) || (29 < day))) returnfalse; elseif((day < 1) || (28 < day)) returnfalse; } } returntrue; }
- 4. /** * Returns the maximum number of days in a month * @return */ publicint maxMonthDays() { if(this.month == 2) { if(isLeapYear()) return 29; else return 28; } elseif((this.month == 1) || (this.month == 3) || (this.month == 5) || (this.month == 7) || (this.month == 8) || (this.month == 10) || (this.month == 12)) return 31; else return 30; } /** * Checks if this dat is same as other date * @param other * @return */ publicboolean isEqual(Date other) { if((this.day == other.day) && (this.month == other.month) && (this.year == other.year)) returntrue; else returnfalse; } /** * Moves this Date object forward in time by the given number of days . * @param days */ publicvoid addDays(int days) { while(days != 0){ int maxDays = maxMonthDays(); if((maxDays - this.day) >= days) { this.day += days;
- 5. days = 0; } else{ days -= (maxDays - this.day); this.day = 0; if(month == 12) { this.month = 1; this.year += 1; } else this.month += 1; } } } /** * Moves this date object forward in time by the given amount of seven day weeks * @param weeks */ publicvoid addWeeks(int weeks) { addDays(weeks * DAYS_PER_WEEK); } /** * Returns the number of days that this Date must be adjusted to make it equal to the given other Date. * @param other * @return */ publicint daysTo(Date other) { Date temp = new Date(this.day, this.month, this.year); if(temp.isEqual(other)) return 0; else{ int noOfDays = 0; do { if((temp.year == other.year) && (temp.month == other.month)) { noOfDays += (other.day - temp.day); temp.day = other.day;
- 6. } else{ int maxDays = temp.maxMonthDays(); noOfDays += (maxDays - temp.day); temp.day = 0; if(temp.month == 12) { temp.month = 1; temp.year += 1; } else temp.month += 1; } } while(!temp.isEqual(other)); return noOfDays; } } /** * Returns a String representation of this date in year/month/day order, such as "2006/07/22" */ @Override public String toString() { returnthis.day + DATE_SEPARATOR + this.month + DATE_SEPARATOR + this.year; } } publicclass Driver { publicstaticvoid main(String[] args) { Date d1 = new Date(29, 1, 2016); Date d2 = new Date(29, 12, 2015); //Add 5 days to d1 System.out.println(" Add 5 days to " + d1 + " : "); d1.addDays(5); System.out.println(d1); //Add 5 days to d2 System.out.println(" Add 5 days to " + d2 + " : "); d2.addDays(5); System.out.println(d2);
- 7. Date d3 = new Date(28, 8, 2016); //Add 1 week to d3 System.out.println(" Add 1 week to " + d3 + " : "); d3.addWeeks(1); System.out.println(d3); Date d4 = new Date(31, 8, 2016); Date d5 = new Date(1, 10, 2016); System.out.println(" The number of days that " + d4 + " must be adjusted to make it equal to " + d5 + " : " + d4.daysTo(d5) + " days."); } } SAMPLE OUTPUT : Add 5 days to 29/1/2016 : 3/2/2016 Add 5 days to 29/12/2015 : 3/1/2016 Add 1 week to 28/8/2016 : 4/9/2016 The number of days that 31/8/2016 must be adjusted to make it equal to 1/10/2016 : 31 days. Solution publicclass Date { privatestatic String DATE_SEPARATOR = "/"; privatestaticintDAYS_PER_WEEK = 7; //Attributes privateint day; privateint month; privateint year; /** * Default Constructor * Instantiates an object of type Date to 1/1/2000 */ public Date() { this.day = 1; this.month = 1;
- 8. this.year = 2000; } /** * Constructs a new date object to represent the given date. * @param day * @param month * @param year */ public Date(int day, int month, int year) { if(isValid(day, month, year)) { this.day = day; this.month = month; this.year = year; } else System.out.println("Invalid Date."); } /** * Returns the day value of this date for example, for the date 2006/07/22, returns 22. * @return */ publicint getDay() { return day; } /** * Returns the month value of this date ,for example, for the date 2006/07/22, returns 7. * @return */ publicint getMonth() { return month; } /** * Returns the year value of this date, for example , the date 2006/07/22, returns 2006. * @return */ publicint getYear() { return year;
- 9. } /** * @param day the day to set */ publicvoid setDay(int day) { this.day = day; } /** * @param month the month to set */ publicvoid setMonth(int month) { this.month = month; } /** * @param year the year to set */ publicvoid setYear(int year) { this.year = year; } /** * Returns true if the year of this date is a leap year. * A leap year occurs every 4 years , except for multiples of 100 that are not multiples of 400. * For example, 1956,1844,1600,and 2000 are leap years, but 1983,2002,1700,and 1900 are not. * @return */ publicboolean isLeapYear(){ if(((this.year % 400) == 0) || (((this.year % 4) == 0) && ((this.year % 100) != 0))) returntrue; else returnfalse; } /** * Checks if the date is valid * @param day * @param month * @param year
- 10. * @return */ publicboolean isValid(int day, int month, int year) { if((month < 1) || (12 < month)) returnfalse; else { if(((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (month == 10) || (month == 12)) && ((day < 1) || (31 < day))) returnfalse; elseif(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && ((day < 1) || (30 < day))) returnfalse; elseif(month == 2) { if(isLeapYear() && ((day < 1) || (29 < day))) returnfalse; elseif((day < 1) || (28 < day)) returnfalse; } } returntrue; } /** * Returns the maximum number of days in a month * @return */ publicint maxMonthDays() { if(this.month == 2) { if(isLeapYear()) return 29; else return 28; } elseif((this.month == 1) || (this.month == 3) || (this.month == 5) || (this.month == 7) || (this.month == 8) || (this.month == 10) || (this.month == 12)) return 31; else return 30;
- 11. } /** * Checks if this dat is same as other date * @param other * @return */ publicboolean isEqual(Date other) { if((this.day == other.day) && (this.month == other.month) && (this.year == other.year)) returntrue; else returnfalse; } /** * Moves this Date object forward in time by the given number of days . * @param days */ publicvoid addDays(int days) { while(days != 0){ int maxDays = maxMonthDays(); if((maxDays - this.day) >= days) { this.day += days; days = 0; } else{ days -= (maxDays - this.day); this.day = 0; if(month == 12) { this.month = 1; this.year += 1; } else this.month += 1; } } } /** * Moves this date object forward in time by the given amount of seven day weeks
- 12. * @param weeks */ publicvoid addWeeks(int weeks) { addDays(weeks * DAYS_PER_WEEK); } /** * Returns the number of days that this Date must be adjusted to make it equal to the given other Date. * @param other * @return */ publicint daysTo(Date other) { Date temp = new Date(this.day, this.month, this.year); if(temp.isEqual(other)) return 0; else{ int noOfDays = 0; do { if((temp.year == other.year) && (temp.month == other.month)) { noOfDays += (other.day - temp.day); temp.day = other.day; } else{ int maxDays = temp.maxMonthDays(); noOfDays += (maxDays - temp.day); temp.day = 0; if(temp.month == 12) { temp.month = 1; temp.year += 1; } else temp.month += 1; } } while(!temp.isEqual(other)); return noOfDays; }
- 13. } /** * Returns a String representation of this date in year/month/day order, such as "2006/07/22" */ @Override public String toString() { returnthis.day + DATE_SEPARATOR + this.month + DATE_SEPARATOR + this.year; } } publicclass Driver { publicstaticvoid main(String[] args) { Date d1 = new Date(29, 1, 2016); Date d2 = new Date(29, 12, 2015); //Add 5 days to d1 System.out.println(" Add 5 days to " + d1 + " : "); d1.addDays(5); System.out.println(d1); //Add 5 days to d2 System.out.println(" Add 5 days to " + d2 + " : "); d2.addDays(5); System.out.println(d2); Date d3 = new Date(28, 8, 2016); //Add 1 week to d3 System.out.println(" Add 1 week to " + d3 + " : "); d3.addWeeks(1); System.out.println(d3); Date d4 = new Date(31, 8, 2016); Date d5 = new Date(1, 10, 2016); System.out.println(" The number of days that " + d4 + " must be adjusted to make it equal to " + d5 + " : " + d4.daysTo(d5) + " days."); } } SAMPLE OUTPUT : Add 5 days to 29/1/2016 : 3/2/2016 Add 5 days to 29/12/2015 :
- 14. 3/1/2016 Add 1 week to 28/8/2016 : 4/9/2016 The number of days that 31/8/2016 must be adjusted to make it equal to 1/10/2016 : 31 days.