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<div class="subTitle">org.apache.calcite.util</div>
<h2 title="类 NumberUtil" class="title">类 NumberUtil</h2>
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<pre>public class <span class="typeNameLabel">NumberUtil</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></pre>
<div class="block">Utility functions for working with numbers.</div>
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<h3>方法概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">方法和说明</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#add-java.lang.Double-java.lang.Double-">add</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/text/DecimalFormat.html?is-external=true" title="java.text中的类或接口">DecimalFormat</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#decimalFormat-java.lang.String-">decimalFormat</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;pattern)</code>
<div class="block">Creates a format.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#divide-java.lang.Double-java.lang.Double-">divide</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html?is-external=true" title="java.text中的类或接口">NumberFormat</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#getApproxFormatter-boolean-">getApproxFormatter</a></span>(boolean&nbsp;isFloat)</code>&nbsp;</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#getMaxUnscaled-int-">getMaxUnscaled</a></span>(int&nbsp;precision)</code>&nbsp;</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#getMinUnscaled-int-">getMinUnscaled</a></span>(int&nbsp;precision)</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#isValidDecimal-java.math.BigDecimal-">isValidDecimal</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;bd)</code>&nbsp;</td>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#min-java.lang.Double-java.lang.Double-">min</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</code>
<div class="block">Like <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html?is-external=true#min-int-int-" title="java.lang中的类或接口"><code>Math.min(int, int)</code></a> but null safe.</div>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#multiply-java.lang.Double-java.lang.Double-">multiply</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</code>&nbsp;</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#powTen-int-">powTen</a></span>(int&nbsp;exponent)</code>&nbsp;</td>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#rescaleBigDecimal-java.math.BigDecimal-int-">rescaleBigDecimal</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;bd,
int&nbsp;scale)</code>&nbsp;</td>
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<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#round-double-">round</a></span>(double&nbsp;d)</code>&nbsp;</td>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#toBigDecimal-java.lang.Number-">toBigDecimal</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="java.lang中的类或接口">Number</a>&nbsp;number)</code>&nbsp;</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/util/NumberUtil.html#toBigDecimal-java.lang.Number-int-">toBigDecimal</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="java.lang中的类或接口">Number</a>&nbsp;number,
int&nbsp;scale)</code>&nbsp;</td>
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<h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
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<h3>方法详细资料</h3>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/text/DecimalFormat.html?is-external=true" title="java.text中的类或接口">DecimalFormat</a>&nbsp;decimalFormat(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;pattern)</pre>
<div class="block">Creates a format. Locale-independent.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a>&nbsp;powTen(int&nbsp;exponent)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a>&nbsp;getMaxUnscaled(int&nbsp;precision)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigInteger.html?is-external=true" title="java.math中的类或接口">BigInteger</a>&nbsp;getMinUnscaled(int&nbsp;precision)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;rescaleBigDecimal(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;bd,
int&nbsp;scale)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;toBigDecimal(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="java.lang中的类或接口">Number</a>&nbsp;number,
int&nbsp;scale)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;toBigDecimal(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Number.html?is-external=true" title="java.lang中的类或接口">Number</a>&nbsp;number)</pre>
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<pre>public static&nbsp;boolean&nbsp;isValidDecimal(<a href="https://docs.oracle.com/javase/8/docs/api/java/math/BigDecimal.html?is-external=true" title="java.math中的类或接口">BigDecimal</a>&nbsp;bd)</pre>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>whether a BigDecimal is a valid Farrago decimal. If a
BigDecimal's unscaled value overflows a long, then it is not a valid
Farrago decimal.</dd>
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<h4>getApproxFormatter</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html?is-external=true" title="java.text中的类或接口">NumberFormat</a>&nbsp;getApproxFormatter(boolean&nbsp;isFloat)</pre>
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<h4>round</h4>
<pre>public static&nbsp;long&nbsp;round(double&nbsp;d)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;add(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;divide(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;multiply(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</pre>
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<h4>min</h4>
<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;min(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;a,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>&nbsp;b)</pre>
<div class="block">Like <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html?is-external=true#min-int-int-" title="java.lang中的类或接口"><code>Math.min(int, int)</code></a> but null safe.</div>
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