DayOfWeek plus() method in Java with Examples
The plus() method of java.time.DayOfWeek is an in-built function in Java which takes a long integer as parameter and returns an instance of DayOfWeek after advancing some days forward or backward as specified by the passed parameter. The calculation rolls around the end of the week from Sunday to Monday. The specified period may be positive or negative.
Method Declaration:
public DayOfWeek plus(long days)
Syntax:
DayOfWeek dayOfWeekObject = dayOfWeekObject.plus(long days)
Parameters: This method takes days as parameter where:
Return Value: The function returns an instance of DayOfWeek after advancing by some days forward or backward.
Below programs illustrate the above method:
Program 1:
// Java Program Demonstrate plus() // method of DayOfWeek import java.time.DayOfWeek; class DayOfWeekExample { public static void main(String[] args) { // Getting an instance of DayOfWeek from int value DayOfWeek dayOfWeek = DayOfWeek.of( 2 ); // Printing the day of the week // and its Int value System.out.println( "Day of the Week : " + dayOfWeek.name() + " - " + dayOfWeek.getValue()); // Number of days to advance long adv = 10 ; // Advancing the day dayOfWeek = dayOfWeek.plus(adv); // Printing the day of the week and its // Int value after adv days System.out.println( "Day of the Week after " + adv + " days: " + dayOfWeek.name() + " - " + dayOfWeek.getValue()); } } |
Output:
Day of the Week : TUESDAY - 2 Day of the Week after 10 days: FRIDAY - 5
Program 2:
// Java Program Demonstrate plus() // method of DayOfWeek import java.time.DayOfWeek; class DayOfWeekExample { public static void main(String[] args) { // Getting an instance of DayOfWeek // from int value DayOfWeek dayOfWeek = DayOfWeek.of( 7 ); // Printing the day of the week // and its Int value System.out.println( "Day of the Week : " + dayOfWeek.name() + " - " + dayOfWeek.getValue()); // Number of days to advance long adv = - 3 ; // Advancing the day dayOfWeek = dayOfWeek.plus(adv); // Printing the day of the week and its // Int value after adv days System.out.println( "Day of the Week after " + adv + " days: " + dayOfWeek.name() + " - " + dayOfWeek.getValue()); } } |
Output:
Day of the Week : SUNDAY - 7 Day of the Week after -3 days: THURSDAY - 4
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#plus-long-