- java.lang.Object
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- java.nio.file.attribute.FileTime
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- All Implemented Interfaces:
Comparable<FileTime>
public final class FileTime extends Object implements Comparable<FileTime>
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description intcompareTo(FileTime other)Compares the value of twoFileTimeobjects for order.booleanequals(Object obj)Tests thisFileTimefor equality with the given object.static FileTimefrom(long value, TimeUnit unit)Returns aFileTimerepresenting a value at the given unit of granularity.static FileTimefrom(Instant instant)Returns aFileTimerepresenting the same point of time value on the time-line as the providedInstantobject.static FileTimefromMillis(long value)Returns aFileTimerepresenting the given value in milliseconds.inthashCode()Computes a hash code for this file time.longto(TimeUnit unit)Returns the value at the given unit of granularity.InstanttoInstant()Converts thisFileTimeobject to anInstant.longtoMillis()Returns the value in milliseconds.StringtoString()Returns the string representation of thisFileTime.
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Method Detail
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from
public static FileTime from(long value, TimeUnit unit)
Returns aFileTimerepresenting a value at the given unit of granularity.- Parameters:
value- the value since the epoch (1970-01-01T00:00:00Z); can be negativeunit- the unit of granularity to interpret the value- Returns:
- a
FileTimerepresenting the given value
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fromMillis
public static FileTime fromMillis(long value)
Returns aFileTimerepresenting the given value in milliseconds.- Parameters:
value- the value, in milliseconds, since the epoch (1970-01-01T00:00:00Z); can be negative- Returns:
- a
FileTimerepresenting the given value
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from
public static FileTime from(Instant instant)
Returns aFileTimerepresenting the same point of time value on the time-line as the providedInstantobject.- Parameters:
instant- the instant to convert- Returns:
- a
FileTimerepresenting the same point on the time-line as the provided instant - Since:
- 1.8
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to
public long to(TimeUnit unit)
Returns the value at the given unit of granularity.Conversion from a coarser granularity that would numerically overflow saturate to
Long.MIN_VALUEif negative orLong.MAX_VALUEif positive.- Parameters:
unit- the unit of granularity for the return value- Returns:
- value in the given unit of granularity, since the epoch since the epoch (1970-01-01T00:00:00Z); can be negative
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toMillis
public long toMillis()
Returns the value in milliseconds.Conversion from a coarser granularity that would numerically overflow saturate to
Long.MIN_VALUEif negative orLong.MAX_VALUEif positive.- Returns:
- the value in milliseconds, since the epoch (1970-01-01T00:00:00Z)
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toInstant
public Instant toInstant()
Converts thisFileTimeobject to anInstant.The conversion creates an
Instantthat represents the same point on the time-line as thisFileTime.FileTimecan store points on the time-line further in the future and further in the past thanInstant. Conversion from such further time points saturates toInstant.MINif earlier thanInstant.MINorInstant.MAXif later thanInstant.MAX.- Returns:
- an instant representing the same point on the time-line as
this
FileTimeobject - Since:
- 1.8
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equals
public boolean equals(Object obj)
Tests thisFileTimefor equality with the given object.The result is
trueif and only if the argument is notnulland is aFileTimethat represents the same time. This method satisfies the general contract of theObject.equalsmethod.- Overrides:
equalsin classObject- Parameters:
obj- the object to compare with- Returns:
trueif, and only if, the given object is aFileTimethat represents the same time- See Also:
Object.hashCode(),HashMap
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hashCode
public int hashCode()
Computes a hash code for this file time.The hash code is based upon the value represented, and satisfies the general contract of the
Object.hashCode()method.- Overrides:
hashCodein classObject- Returns:
- the hash-code value
- See Also:
Object.equals(java.lang.Object),System.identityHashCode(java.lang.Object)
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compareTo
public int compareTo(FileTime other)
Compares the value of twoFileTimeobjects for order.- Specified by:
compareToin interfaceComparable<FileTime>- Parameters:
other- the otherFileTimeto be compared- Returns:
0if thisFileTimeis equal toother, a value less than 0 if thisFileTimerepresents a time that is beforeother, and a value greater than 0 if thisFileTimerepresents a time that is afterother
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toString
public String toString()
Returns the string representation of thisFileTime. The string is returned in the ISO 8601 format:YYYY-MM-DDThh:mm:ss[.s+]Zwhere "[.s+]" represents a dot followed by one of more digits for the decimal fraction of a second. It is only present when the decimal fraction of a second is not zero. For example,FileTime.fromMillis(1234567890000L).toString()yields"2009-02-13T23:31:30Z", andFileTime.fromMillis(1234567890123L).toString()yields"2009-02-13T23:31:30.123Z".A
FileTimeis primarily intended to represent the value of a file's time stamp. Where used to represent extreme values, where the year is less than "0001" or greater than "9999" then this method deviates from ISO 8601 in the same manner as the XML Schema language. That is, the year may be expanded to more than four digits and may be negative-signed. If more than four digits then leading zeros are not present. The year before "0001" is "-0001".
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