Free, open-source Java library for working with dates and times
Supported Concepts
Instant
“An instant in the datetime continuum specified as a number of milliseconds from 1970-01-01T00:00Z”
Within Joda-Time an instant is represented by the ReadableInstant interface.
There are four implementations of the interface provided.
Instant - A simple immutable implementation which is restricted to the UTC time zone and is intended for time zone and calendar neutral data transfer
DateTime - The most commonly used class in the library, and an immutable representation of a date and time with calendar and time zone
DateMidnight - Similar to DateTime and also immutable but with the time component forced to be midnight (at the start of a day)
MutableDateTime - A mutable representation of date and time with calendar and time zone.
• Partial
a partial date/time representation (subset of fields) with no time zone
• Interval
“an interval of time from one millisecond instant to another”
• Duration
“a duration of time measured in milliseconds”
• Period
“a period of time defined in terms of fields, for example, 3 years 5 months 2 days and 7 hours”
• Chronology “a pluggable calendar system
Supported Concepts
Instant
“An instant in the datetime continuum specified as a number of milliseconds from 1970-01-01T00:00Z”
Within Joda-Time an instant is represented by the ReadableInstant interface.
There are four implementations of the interface provided.
Instant - A simple immutable implementation which is restricted to the UTC time zone and is intended for time zone and calendar neutral data transfer
DateTime - The most commonly used class in the library, and an immutable representation of a date and time with calendar and time zone
DateMidnight - Similar to DateTime and also immutable but with the time component forced to be midnight (at the start of a day)
MutableDateTime - A mutable representation of date and time with calendar and time zone.
• Partial
a partial date/time representation (subset of fields) with no time zone
• Interval
“an interval of time from one millisecond instant to another”
• Duration
“a duration of time measured in milliseconds”
• Period
“a period of time defined in terms of fields, for example, 3 years 5 months 2 days and 7 hours”
• Chronology “a pluggable calendar system
