| Package | Description | 
|---|---|
| net.time4j | 
 The main package contains four basic types of ISO-8601, namely
  
PlainDate, PlainTime, PlainTimestamp
 and Moment. | 
| net.time4j.engine | 
 Defines the common generic schemes and interfaces of chronological
 systems. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
Duration<U extends IsoUnit>
ISO-8601-compatible duration between two time points. 
 | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
AbstractMetric<U extends ChronoUnit,P extends AbstractDuration<U>>
Represents a metric suitable for the default algorithm of Time4J. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
abstract AbstractDuration<U> | 
AbstractDuration.inverse()
Creates a copy of this duration with the same amounts and
 units but the inversed sign. 
 | 
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