org.apache.commons.lang3.time

Class DurationFormatUtils

java.lang.Object

org.apache.commons.lang3.time.DurationFormatUtils

public class DurationFormatUtils
extends Object

Duration formatting utilities and constants. The following table describes the tokens used in the pattern language for formatting.

Pattern Tokens

character	duration element
y	years
M	months
d	days
H	hours
m	minutes
s	seconds
S	milliseconds
'text'	arbitrary text content

Note: It's not currently possible to include a single-quote in a format.
Token values are printed using decimal digits. A token character can be repeated to ensure that the field occupies a certain minimum size. Values will be left-padded with 0 unless padding is disabled in the method invocation.

Since:

2.1

Field Summary

Fields

Modifier and Type	Field and Description
static String	ISO_EXTENDED_FORMAT_PATTERN Pattern used with FastDateFormat and SimpleDateFormat for the ISO 8601 period format used in durations.

Constructor Summary

Constructors

Constructor and Description
DurationFormatUtils() DurationFormatUtils instances should NOT be constructed in standard programming.

Method Summary

Modifier and Type	Method and Description
static String	formatDuration(long durationMillis, String format) Formats the time gap as a string, using the specified format, and padding with zeros.
static String	formatDuration(long durationMillis, String format, boolean padWithZeros) Formats the time gap as a string, using the specified format.
static String	formatDurationHMS(long durationMillis) Formats the time gap as a string.
static String	formatDurationISO(long durationMillis) Formats the time gap as a string.
static String	formatDurationWords(long durationMillis, boolean suppressLeadingZeroElements, boolean suppressTrailingZeroElements) Formats an elapsed time into a pluralization correct string.
static String	formatPeriod(long startMillis, long endMillis, String format) Formats the time gap as a string, using the specified format.
static String	formatPeriod(long startMillis, long endMillis, String format, boolean padWithZeros, TimeZone timezone) Formats the time gap as a string, using the specified format.
static String	formatPeriodISO(long startMillis, long endMillis) Formats the time gap as a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ISO_EXTENDED_FORMAT_PATTERN

public static final String ISO_EXTENDED_FORMAT_PATTERN

Pattern used with FastDateFormat and SimpleDateFormat for the ISO 8601 period format used in durations.

See Also:

FastDateFormat, SimpleDateFormat, Constant Field Values

Constructor Detail

DurationFormatUtils

public DurationFormatUtils()

DurationFormatUtils instances should NOT be constructed in standard programming.

This constructor is public to permit tools that require a JavaBean instance to operate.

Method Detail

formatDurationHMS

public static String formatDurationHMS(long durationMillis)

Formats the time gap as a string.

The format used is ISO 8601-like: HH:mm:ss.SSS.

Parameters:

durationMillis - the duration to format

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if durationMillis is negative

formatDurationISO

public static String formatDurationISO(long durationMillis)

Formats the time gap as a string.

The format used is the ISO 8601 period format.

This method formats durations using the days and lower fields of the ISO format pattern, such as P7D6TH5M4.321S.

Parameters:

durationMillis - the duration to format

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if durationMillis is negative

formatDuration

public static String formatDuration(long durationMillis,
                                    String format)

Formats the time gap as a string, using the specified format, and padding with zeros.

This method formats durations using the days and lower fields of the format pattern. Months and larger are not used.

Parameters:

durationMillis - the duration to format

format - the way in which to format the duration, not null

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if durationMillis is negative

formatDuration

public static String formatDuration(long durationMillis,
                                    String format,
                                    boolean padWithZeros)

Formats the time gap as a string, using the specified format. Padding the left hand side of numbers with zeroes is optional.

This method formats durations using the days and lower fields of the format pattern. Months and larger are not used.

Parameters:

durationMillis - the duration to format

format - the way in which to format the duration, not null

padWithZeros - whether to pad the left hand side of numbers with 0's

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if durationMillis is negative

formatDurationWords

public static String formatDurationWords(long durationMillis,
                                         boolean suppressLeadingZeroElements,
                                         boolean suppressTrailingZeroElements)

Formats an elapsed time into a pluralization correct string.

This method formats durations using the days and lower fields of the format pattern. Months and larger are not used.

Parameters:

durationMillis - the elapsed time to report in milliseconds

suppressLeadingZeroElements - suppresses leading 0 elements

suppressTrailingZeroElements - suppresses trailing 0 elements

Returns:

the formatted text in days/hours/minutes/seconds, not null

Throws:

IllegalArgumentException - if durationMillis is negative

formatPeriodISO

public static String formatPeriodISO(long startMillis,
                                     long endMillis)

Formats the time gap as a string.

The format used is the ISO 8601 period format.

Parameters:

startMillis - the start of the duration to format

endMillis - the end of the duration to format

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if startMillis is greater than endMillis

formatPeriod

public static String formatPeriod(long startMillis,
                                  long endMillis,
                                  String format)

Formats the time gap as a string, using the specified format. Padding the left hand side of numbers with zeroes is optional.

Parameters:

startMillis - the start of the duration

endMillis - the end of the duration

format - the way in which to format the duration, not null

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if startMillis is greater than endMillis

formatPeriod

public static String formatPeriod(long startMillis,
                                  long endMillis,
                                  String format,
                                  boolean padWithZeros,
                                  TimeZone timezone)

Formats the time gap as a string, using the specified format. Padding the left hand side of numbers with zeroes is optional and the time zone may be specified.

When calculating the difference between months/days, it chooses to calculate months first. So when working out the number of months and days between January 15th and March 10th, it choose 1 month and 23 days gained by choosing January->February = 1 month and then calculating days forwards, and not the 1 month and 26 days gained by choosing March -> February = 1 month and then calculating days backwards.

For more control, the Joda-Time library is recommended.

Parameters:

startMillis - the start of the duration

endMillis - the end of the duration

format - the way in which to format the duration, not null

padWithZeros - whether to pad the left hand side of numbers with 0's

timezone - the millis are defined in

Returns:

the formatted duration, not null

Throws:

IllegalArgumentException - if startMillis is greater than endMillis