Class TimeSource.SystemTimeSource
- java.lang.Object
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- javax.time.TimeSource
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- javax.time.TimeSource.SystemTimeSource
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- All Implemented Interfaces:
java.io.Serializable
- Enclosing class:
- TimeSource
static final class TimeSource.SystemTimeSource extends TimeSource implements java.io.Serializable
Implementation of a time-source that always returns the latest time fromSystem.currentTimeMillis()
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Nested Class Summary
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Nested classes/interfaces inherited from class javax.time.TimeSource
TimeSource.FixedTimeSource, TimeSource.OffsetSystemTimeSource, TimeSource.SystemTimeSource
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Field Summary
Fields Modifier and Type Field Description (package private) static TimeSource.SystemTimeSource
INSTANCE
Singleton instance.private static long
serialVersionUID
A serialization identifier for this class.
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Constructor Summary
Constructors Modifier Constructor Description private
SystemTimeSource()
Restricted constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Instant
instant()
Gets the currentInstant
.long
millis()
Gets the current millisecond instant.private java.lang.Object
readResolve()
Resolve singletons.java.lang.String
toString()
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Methods inherited from class javax.time.TimeSource
fixed, offsetSystem, system, taiInstant, utcInstant
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Field Detail
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INSTANCE
static final TimeSource.SystemTimeSource INSTANCE
Singleton instance.
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serialVersionUID
private static final long serialVersionUID
A serialization identifier for this class.- See Also:
- Constant Field Values
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Method Detail
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readResolve
private java.lang.Object readResolve()
Resolve singletons.
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instant
public Instant instant()
Gets the currentInstant
.The instant returned by this method will vary according to the implementation. For example, the time-source returned by
TimeSource.system()
will return an instant based onSystem.currentTimeMillis()
.Normally, this method will not throw an exception. However, one possible implementation would be to obtain the time from a central time server across the network. Obviously, in this case the lookup could fail, and so the method is permitted to throw an exception.
- Specified by:
instant
in classTimeSource
- Returns:
- the current
Instant
from this time-source, never null
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millis
public long millis()
Gets the current millisecond instant.The instant returned by this method will vary according to the implementation. For example, the time-source returned by
TimeSource.system()
will returnSystem.currentTimeMillis()
.This method is provided for backwards compatibility. New code should use classes such as
Instant
to represent an instant rather than a raw millisecond value.Normally, this method will not throw an exception. However, one possible implementation would be to obtain the time from a central time server across the network. Obviously, in this case the lookup could fail, and so the method is permitted to throw an exception.
- Overrides:
millis
in classTimeSource
- Returns:
- the current millisecond instant from this time-source, measured from the Java epoch of 1970-01-01T00:00 UTC, never null
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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