DayOfWeek

AI-generated Key Takeaways

• DayOfWeek is an enum that represents the seven days of the week (Monday-Sunday).

• Each day is assigned an integer value from 1 (Monday) to 7 (Sunday) following the ISO-8601 standard.

• It's recommended to use the enum values for code clarity instead of relying on ordinal() for numeric representation; use getValue() instead.

• DayOfWeek can be used by any calendar system with a day-of-week concept equivalent to the ISO calendar system.

public final enum DayOfWeek extends Enum<DayOfWeek>
implements TemporalAccessor TemporalAdjuster

A day-of-week, such as 'Tuesday'.

DayOfWeek is an enum representing the 7 days of the week - Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.

In addition to the textual enum name, each day-of-week has an int value. The int value follows the ISO-8601 standard, from 1 (Monday) to 7 (Sunday). It is recommended that applications use the enum rather than the int value to ensure code clarity.

This enum provides access to the localized textual form of the day-of-week. Some locales also assign different numeric values to the days, declaring Sunday to have the value 1, however this class provides no support for this. See WeekFields for localized week-numbering.

Do not use ordinal() to obtain the numeric representation of DayOfWeek. Use getValue() instead.

This enum represents a common concept that is found in many calendar systems. As such, this enum may be used by any calendar system that has the day-of-week concept defined exactly equivalent to the ISO calendar system.

Inherited Method Summary

From class java.lang.Enum

final Object	clone() Throws CloneNotSupportedException.
final int	compareTo(DayOfWeek o) Compares this enum with the specified object for order.
final boolean	equals(Object other) Returns true if the specified object is equal to this enum constant.
final void	finalize() enum classes cannot have finalize methods.
final Class<DayOfWeek>	getDeclaringClass() Returns the Class object corresponding to this enum constant's enum type.
final int	hashCode() Returns a hash code for this enum constant.
final String	name() Returns the name of this enum constant, exactly as declared in its enum declaration.
final int	ordinal() Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero).
String	toString() Returns the name of this enum constant, as contained in the declaration.
static <T extends Enum<T>> T	valueOf(Class<T> enumType, String name) Returns the enum constant of the specified enum type with the specified name.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.lang.Comparable

abstract int

compareTo(DayOfWeek o) Compares this object with the specified object for order.

From interface java.time.temporal.TemporalAccessor

int	get(TemporalField field) Gets the value of the specified field as an int.
abstract long	getLong(TemporalField field) Gets the value of the specified field as a long.
abstract boolean	isSupported(TemporalField field) Checks if the specified field is supported.
<R> R	query(TemporalQuery<R> query) Queries this date-time.
ValueRange	range(TemporalField field) Gets the range of valid values for the specified field.

From interface java.time.temporal.TemporalAdjuster

abstract Temporal

adjustInto(Temporal temporal) Adjusts the specified temporal object.

Enum Values

public static final DayOfWeek FRIDAY

The singleton instance for the day-of-week of Friday. This has the numeric value of 5.

public static final DayOfWeek MONDAY

The singleton instance for the day-of-week of Monday. This has the numeric value of 1.

public static final DayOfWeek SATURDAY

The singleton instance for the day-of-week of Saturday. This has the numeric value of 6.

public static final DayOfWeek SUNDAY

The singleton instance for the day-of-week of Sunday. This has the numeric value of 7.

public static final DayOfWeek THURSDAY

The singleton instance for the day-of-week of Thursday. This has the numeric value of 4.

public static final DayOfWeek TUESDAY

The singleton instance for the day-of-week of Tuesday. This has the numeric value of 2.

public static final DayOfWeek WEDNESDAY

The singleton instance for the day-of-week of Wednesday. This has the numeric value of 3.