Class Years
- All Implemented Interfaces:
Serializable,Comparable<BaseSingleFieldPeriod>,ReadablePeriod
Years is an immutable period that can only store years.
It does not store months, days or hours for example. As such it is a
type-safe way of representing a number of years in an application.
The number of years is set in the constructor, and may be queried using
getYears(). Basic mathematical operations are provided -
plus(), minus(), multipliedBy() and
dividedBy().
Years is thread-safe and immutable.
- Since:
- 1.4
- Author:
- Stephen Colebourne
- See Also:
-
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final YearsConstant representing the maximum number of years that can be stored in this object.static final YearsConstant representing the minimum number of years that can be stored in this object.static final YearsConstant representing one year.static final YearsConstant representing three years.static final YearsConstant representing two years.static final YearsConstant representing zero years. -
Method Summary
Modifier and TypeMethodDescriptiondividedBy(int divisor) Returns a new instance with the years divided by the specified divisor.Gets the duration field type, which isyears.Gets the period type, which isyears.intgetYears()Gets the number of years that this period represents.booleanisGreaterThan(Years other) Is this years instance greater than the specified number of years.booleanisLessThan(Years other) Is this years instance less than the specified number of years.minus(int years) Returns a new instance with the specified number of years taken away.Returns a new instance with the specified number of years taken away.multipliedBy(int scalar) Returns a new instance with the years multiplied by the specified scalar.negated()Returns a new instance with the years value negated.static YearsparseYears(String periodStr) Creates a newYearsby parsing a string in the ISO8601 format 'PnY'.plus(int years) Returns a new instance with the specified number of years added.Returns a new instance with the specified number of years added.toString()Gets this instance as a String in the ISO8601 duration format.static Yearsyears(int years) Obtains an instance ofYearsthat may be cached.static YearsyearsBetween(ReadableInstant start, ReadableInstant end) Creates aYearsrepresenting the number of whole years between the two specified datetimes.static YearsyearsBetween(ReadablePartial start, ReadablePartial end) Creates aYearsrepresenting the number of whole years between the two specified partial datetimes.static YearsyearsIn(ReadableInterval interval) Creates aYearsrepresenting the number of whole years in the specified interval.Methods inherited from class org.joda.time.base.BaseSingleFieldPeriod
between, between, compareTo, equals, get, getFieldType, getValue, getValue, hashCode, isSupported, setValue, size, standardPeriodIn, toMutablePeriod, toPeriod
-
Field Details
-
ZERO
Constant representing zero years. -
ONE
Constant representing one year. -
TWO
Constant representing two years. -
THREE
Constant representing three years. -
MAX_VALUE
Constant representing the maximum number of years that can be stored in this object. -
MIN_VALUE
Constant representing the minimum number of years that can be stored in this object.
-
-
Method Details
-
years
Obtains an instance ofYearsthat may be cached.Yearsis immutable, so instances can be cached and shared. This factory method provides access to shared instances.- Parameters:
years- the number of years to obtain an instance for- Returns:
- the instance of Years
-
yearsBetween
Creates aYearsrepresenting the number of whole years between the two specified datetimes. This method correctly handles any daylight savings time changes that may occur during the interval.- Parameters:
start- the start instant, must not be nullend- the end instant, must not be null- Returns:
- the period in years
- Throws:
IllegalArgumentException- if the instants are null or invalid
-
yearsBetween
Creates aYearsrepresenting the number of whole years between the two specified partial datetimes.The two partials must contain the same fields, for example you can specify two
LocalDateobjects.- Parameters:
start- the start partial date, must not be nullend- the end partial date, must not be null- Returns:
- the period in years
- Throws:
IllegalArgumentException- if the partials are null or invalid
-
yearsIn
Creates aYearsrepresenting the number of whole years in the specified interval. This method correctly handles any daylight savings time changes that may occur during the interval.- Parameters:
interval- the interval to extract years from, null returns zero- Returns:
- the period in years
- Throws:
IllegalArgumentException- if the partials are null or invalid
-
parseYears
Creates a newYearsby parsing a string in the ISO8601 format 'PnY'.The parse will accept the full ISO syntax of PnYnMnWnDTnHnMnS however only the years component may be non-zero. If any other component is non-zero, an exception will be thrown.
- Parameters:
periodStr- the period string, null returns zero- Returns:
- the period in years
- Throws:
IllegalArgumentException- if the string format is invalid
-
getFieldType
Gets the duration field type, which isyears.- Specified by:
getFieldTypein classBaseSingleFieldPeriod- Returns:
- the period type
-
getPeriodType
Gets the period type, which isyears.- Specified by:
getPeriodTypein interfaceReadablePeriod- Specified by:
getPeriodTypein classBaseSingleFieldPeriod- Returns:
- the period type
-
getYears
public int getYears()Gets the number of years that this period represents.- Returns:
- the number of years in the period
-
plus
Returns a new instance with the specified number of years added.This instance is immutable and unaffected by this method call.
- Parameters:
years- the amount of years to add, may be negative- Returns:
- the new period plus the specified number of years
- Throws:
ArithmeticException- if the result overflows an int
-
plus
Returns a new instance with the specified number of years added.This instance is immutable and unaffected by this method call.
- Parameters:
years- the amount of years to add, may be negative, null means zero- Returns:
- the new period plus the specified number of years
- Throws:
ArithmeticException- if the result overflows an int
-
minus
Returns a new instance with the specified number of years taken away.This instance is immutable and unaffected by this method call.
- Parameters:
years- the amount of years to take away, may be negative- Returns:
- the new period minus the specified number of years
- Throws:
ArithmeticException- if the result overflows an int
-
minus
Returns a new instance with the specified number of years taken away.This instance is immutable and unaffected by this method call.
- Parameters:
years- the amount of years to take away, may be negative, null means zero- Returns:
- the new period minus the specified number of years
- Throws:
ArithmeticException- if the result overflows an int
-
multipliedBy
Returns a new instance with the years multiplied by the specified scalar.This instance is immutable and unaffected by this method call.
- Parameters:
scalar- the amount to multiply by, may be negative- Returns:
- the new period multiplied by the specified scalar
- Throws:
ArithmeticException- if the result overflows an int
-
dividedBy
Returns a new instance with the years divided by the specified divisor. The calculation uses integer division, thus 3 divided by 2 is 1.This instance is immutable and unaffected by this method call.
- Parameters:
divisor- the amount to divide by, may be negative- Returns:
- the new period divided by the specified divisor
- Throws:
ArithmeticException- if the divisor is zero
-
negated
Returns a new instance with the years value negated.- Returns:
- the new period with a negated value
- Throws:
ArithmeticException- if the result overflows an int
-
isGreaterThan
Is this years instance greater than the specified number of years.- Parameters:
other- the other period, null means zero- Returns:
- true if this years instance is greater than the specified one
-
isLessThan
Is this years instance less than the specified number of years.- Parameters:
other- the other period, null means zero- Returns:
- true if this years instance is less than the specified one
-
toString
Gets this instance as a String in the ISO8601 duration format.For example, "P4Y" represents 4 years.
- Specified by:
toStringin interfaceReadablePeriod- Overrides:
toStringin classObject- Returns:
- the value as an ISO8601 string
-