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<div class="subTitle">org.joda.time.field</div>
<h2 title="Class ImpreciseDateTimeField" class="title">Class ImpreciseDateTimeField</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../org/joda/time/DateTimeField.html" title="class in org.joda.time">org.joda.time.DateTimeField</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">org.joda.time.field.BaseDateTimeField</a></li>
<li>
<ul class="inheritance">
<li>org.joda.time.field.ImpreciseDateTimeField</li>
</ul>
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<pre>public abstract class <span class="strong">ImpreciseDateTimeField</span>
extends <a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></pre>
<div class="block">Abstract datetime field class that defines its own DurationField, which
delegates back into this ImpreciseDateTimeField.
<p>
This DateTimeField is useful for defining DateTimeFields that are composed
of imprecise durations. If both duration fields are precise, then a
<a href="../../../../org/joda/time/field/PreciseDateTimeField.html" title="class in org.joda.time.field"><code>PreciseDateTimeField</code></a> should be used instead.
<p>
When defining imprecise DateTimeFields where a matching DurationField is
already available, just extend BaseDateTimeField directly so as not to
create redundant DurationField instances.
<p>
ImpreciseDateTimeField is thread-safe and immutable, and its subclasses must
be as well.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.0</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/joda/time/field/PreciseDateTimeField.html" title="class in org.joda.time.field"><code>PreciseDateTimeField</code></a></dd></dl>
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<h3>Constructor Summary</h3>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#ImpreciseDateTimeField(org.joda.time.DateTimeFieldType, long)">ImpreciseDateTimeField</a></strong>(<a href="../../../../org/joda/time/DateTimeFieldType.html" title="class in org.joda.time">DateTimeFieldType</a> type,
long unitMillis)</code>
<div class="block">Constructor.</div>
</td>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>abstract long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#add(long, int)">add</a></strong>(long instant,
int value)</code>
<div class="block">Adds a value (which may be negative) to the instant value,
overflowing into larger fields if necessary.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>abstract long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#add(long, long)">add</a></strong>(long instant,
long value)</code>
<div class="block">Adds a value (which may be negative) to the instant value,
overflowing into larger fields if necessary.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>abstract int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#get(long)">get</a></strong>(long instant)</code>
<div class="block">Get the value of this field from the milliseconds.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#getDifference(long, long)">getDifference</a></strong>(long minuendInstant,
long subtrahendInstant)</code>
<div class="block">Computes the difference between two instants, as measured in the units
of this field.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#getDifferenceAsLong(long, long)">getDifferenceAsLong</a></strong>(long minuendInstant,
long subtrahendInstant)</code>
<div class="block">Computes the difference between two instants, as measured in the units
of this field.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../org/joda/time/DurationField.html" title="class in org.joda.time">DurationField</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#getDurationField()">getDurationField</a></strong>()</code>
<div class="block">Returns the duration per unit value of this field.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#getDurationUnitMillis()">getDurationUnitMillis</a></strong>()</code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>abstract <a href="../../../../org/joda/time/DurationField.html" title="class in org.joda.time">DurationField</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#getRangeDurationField()">getRangeDurationField</a></strong>()</code>
<div class="block">Returns the range duration of this field.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>abstract long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#roundFloor(long)">roundFloor</a></strong>(long instant)</code>
<div class="block">Round to the lowest whole unit of this field.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>abstract long</code></td>
<td class="colLast"><code><strong><a href="../../../../org/joda/time/field/ImpreciseDateTimeField.html#set(long, int)">set</a></strong>(long instant,
int value)</code>
<div class="block">Sets a value in the milliseconds supplied.</div>
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<h3>Methods inherited from class org.joda.time.field.<a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></h3>
<code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(org.joda.time.ReadablePartial, int, int[], int)">add</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#addWrapField(long, int)">addWrapField</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#addWrapField(org.joda.time.ReadablePartial, int, int[], int)">addWrapField</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#addWrapPartial(org.joda.time.ReadablePartial, int, int[], int)">addWrapPartial</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#convertText(java.lang.String, java.util.Locale)">convertText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsShortText(int, java.util.Locale)">getAsShortText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsShortText(long)">getAsShortText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsShortText(long, java.util.Locale)">getAsShortText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsShortText(org.joda.time.ReadablePartial, int, java.util.Locale)">getAsShortText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsShortText(org.joda.time.ReadablePartial, java.util.Locale)">getAsShortText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsText(int, java.util.Locale)">getAsText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsText(long)">getAsText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsText(long, java.util.Locale)">getAsText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsText(org.joda.time.ReadablePartial, int, java.util.Locale)">getAsText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getAsText(org.joda.time.ReadablePartial, java.util.Locale)">getAsText</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getLeapAmount(long)">getLeapAmount</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getLeapDurationField()">getLeapDurationField</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumShortTextLength(java.util.Locale)">getMaximumShortTextLength</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumTextLength(java.util.Locale)">getMaximumTextLength</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumValue()">getMaximumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumValue(long)">getMaximumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumValue(org.joda.time.ReadablePartial)">getMaximumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMaximumValue(org.joda.time.ReadablePartial, int[])">getMaximumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMinimumValue()">getMinimumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMinimumValue(long)">getMinimumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMinimumValue(org.joda.time.ReadablePartial)">getMinimumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getMinimumValue(org.joda.time.ReadablePartial, int[])">getMinimumValue</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getName()">getName</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#getType()">getType</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#isLeap(long)">isLeap</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#isSupported()">isSupported</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#remainder(long)">remainder</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundCeiling(long)">roundCeiling</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundHalfCeiling(long)">roundHalfCeiling</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundHalfEven(long)">roundHalfEven</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundHalfFloor(long)">roundHalfFloor</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(long, java.lang.String)">set</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(long, java.lang.String, java.util.Locale)">set</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(org.joda.time.ReadablePartial, int, int[], int)">set</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(org.joda.time.ReadablePartial, int, int[], java.lang.String, java.util.Locale)">set</a>, <a href="../../../../org/joda/time/field/BaseDateTimeField.html#toString()">toString</a></code></li>
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<h3>Methods inherited from class org.joda.time.<a href="../../../../org/joda/time/DateTimeField.html" title="class in org.joda.time">DateTimeField</a></h3>
<code><a href="../../../../org/joda/time/DateTimeField.html#isLenient()">isLenient</a></code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
</ul>
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<h4>ImpreciseDateTimeField</h4>
<pre>public ImpreciseDateTimeField(<a href="../../../../org/joda/time/DateTimeFieldType.html" title="class in org.joda.time">DateTimeFieldType</a> type,
long unitMillis)</pre>
<div class="block">Constructor.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>type</code> - the field type</dd><dd><code>unitMillis</code> - the average duration unit milliseconds</dd></dl>
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<h4>get</h4>
<pre>public abstract int get(long instant)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#get(long)">BaseDateTimeField</a></code></strong></div>
<div class="block">Get the value of this field from the milliseconds.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#get(long)">get</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>instant</code> - the milliseconds from 1970-01-01T00:00:00Z to query</dd>
<dt><span class="strong">Returns:</span></dt><dd>the value of the field, in the units of the field</dd></dl>
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<h4>set</h4>
<pre>public abstract long set(long instant,
int value)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(long, int)">BaseDateTimeField</a></code></strong></div>
<div class="block">Sets a value in the milliseconds supplied.
<p>
The value of this field will be set.
If the value is invalid, an exception if thrown.
<p>
If setting this field would make other fields invalid, then those fields
may be changed. For example if the current date is the 31st January, and
the month is set to February, the day would be invalid. Instead, the day
would be changed to the closest value - the 28th/29th February as appropriate.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#set(long, int)">set</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>instant</code> - the milliseconds from 1970-01-01T00:00:00Z to set in</dd><dd><code>value</code> - the value to set, in the units of the field</dd>
<dt><span class="strong">Returns:</span></dt><dd>the updated milliseconds</dd></dl>
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<h4>add</h4>
<pre>public abstract long add(long instant,
int value)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(long, int)">BaseDateTimeField</a></code></strong></div>
<div class="block">Adds a value (which may be negative) to the instant value,
overflowing into larger fields if necessary.
<p>
The value will be added to this field. If the value is too large to be
added solely to this field, larger fields will increase as required.
Smaller fields should be unaffected, except where the result would be
an invalid value for a smaller field. In this case the smaller field is
adjusted to be in range.
<p>
For example, in the ISO chronology:<br>
2000-08-20 add six months is 2001-02-20<br>
2000-08-20 add twenty months is 2002-04-20<br>
2000-08-20 add minus nine months is 1999-11-20<br>
2001-01-31 add one month is 2001-02-28<br>
2001-01-31 add two months is 2001-03-31<br></div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(long, int)">add</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>instant</code> - the milliseconds from 1970-01-01T00:00:00Z to add to</dd><dd><code>value</code> - the value to add, in the units of the field</dd>
<dt><span class="strong">Returns:</span></dt><dd>the updated milliseconds</dd></dl>
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<h4>add</h4>
<pre>public abstract long add(long instant,
long value)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(long, long)">BaseDateTimeField</a></code></strong></div>
<div class="block">Adds a value (which may be negative) to the instant value,
overflowing into larger fields if necessary.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(long, long)">add</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>instant</code> - the milliseconds from 1970-01-01T00:00:00Z to add to</dd><dd><code>value</code> - the long value to add, in the units of the field</dd>
<dt><span class="strong">Returns:</span></dt><dd>the updated milliseconds</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../org/joda/time/field/BaseDateTimeField.html#add(long, int)"><code>BaseDateTimeField.add(long,int)</code></a></dd></dl>
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<h4>getDifference</h4>
<pre>public int getDifference(long minuendInstant,
long subtrahendInstant)</pre>
<div class="block">Computes the difference between two instants, as measured in the units
of this field. Any fractional units are dropped from the result. Calling
getDifference reverses the effect of calling add. In the following code:
<pre>
long instant = ...
int v = ...
int age = getDifference(add(instant, v), instant);
</pre>
The value 'age' is the same as the value 'v'.
<p>
The default implementation call getDifferenceAsLong and converts the
return value to an int.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getDifference(long, long)">getDifference</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>minuendInstant</code> - the milliseconds from 1970-01-01T00:00:00Z to
subtract from</dd><dd><code>subtrahendInstant</code> - the milliseconds from 1970-01-01T00:00:00Z to
subtract off the minuend</dd>
<dt><span class="strong">Returns:</span></dt><dd>the difference in the units of this field</dd></dl>
</li>
</ul>
<a name="getDifferenceAsLong(long, long)">
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</a>
<ul class="blockList">
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<h4>getDifferenceAsLong</h4>
<pre>public long getDifferenceAsLong(long minuendInstant,
long subtrahendInstant)</pre>
<div class="block">Computes the difference between two instants, as measured in the units
of this field. Any fractional units are dropped from the result. Calling
getDifference reverses the effect of calling add. In the following code:
<pre>
long instant = ...
long v = ...
long age = getDifferenceAsLong(add(instant, v), instant);
</pre>
The value 'age' is the same as the value 'v'.
<p>
The default implementation performs a guess-and-check algorithm using
getDurationField().getUnitMillis() and the add() method. Subclasses are
encouraged to provide a more efficient implementation.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getDifferenceAsLong(long, long)">getDifferenceAsLong</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>minuendInstant</code> - the milliseconds from 1970-01-01T00:00:00Z to
subtract from</dd><dd><code>subtrahendInstant</code> - the milliseconds from 1970-01-01T00:00:00Z to
subtract off the minuend</dd>
<dt><span class="strong">Returns:</span></dt><dd>the difference in the units of this field</dd></dl>
</li>
</ul>
<a name="getDurationField()">
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<h4>getDurationField</h4>
<pre>public final <a href="../../../../org/joda/time/DurationField.html" title="class in org.joda.time">DurationField</a> getDurationField()</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getDurationField()">BaseDateTimeField</a></code></strong></div>
<div class="block">Returns the duration per unit value of this field. For example, if this
field represents "hour of day", then the unit duration is an hour.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getDurationField()">getDurationField</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the duration of this field, or UnsupportedDurationField if field
has no duration</dd></dl>
</li>
</ul>
<a name="getRangeDurationField()">
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<h4>getRangeDurationField</h4>
<pre>public abstract <a href="../../../../org/joda/time/DurationField.html" title="class in org.joda.time">DurationField</a> getRangeDurationField()</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getRangeDurationField()">BaseDateTimeField</a></code></strong></div>
<div class="block">Returns the range duration of this field. For example, if this field
represents "hour of day", then the range duration is a day.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#getRangeDurationField()">getRangeDurationField</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the range duration of this field, or null if field has no range</dd></dl>
</li>
</ul>
<a name="roundFloor(long)">
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<h4>roundFloor</h4>
<pre>public abstract long roundFloor(long instant)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundFloor(long)">BaseDateTimeField</a></code></strong></div>
<div class="block">Round to the lowest whole unit of this field. After rounding, the value
of this field and all fields of a higher magnitude are retained. The
fractional millis that cannot be expressed in whole increments of this
field are set to minimum.
<p>
For example, a datetime of 2002-11-02T23:34:56.789, rounded to the
lowest whole hour is 2002-11-02T23:00:00.000.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../org/joda/time/field/BaseDateTimeField.html#roundFloor(long)">roundFloor</a></code> in class <code><a href="../../../../org/joda/time/field/BaseDateTimeField.html" title="class in org.joda.time.field">BaseDateTimeField</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>instant</code> - the milliseconds from 1970-01-01T00:00:00Z to round</dd>
<dt><span class="strong">Returns:</span></dt><dd>rounded milliseconds</dd></dl>
</li>
</ul>
<a name="getDurationUnitMillis()">
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</a>
<ul class="blockListLast">
<li class="blockList">
<h4>getDurationUnitMillis</h4>
<pre>protected final long getDurationUnitMillis()</pre>
</li>
</ul>
</li>
</ul>
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</ul>
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