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<title>J9ObjectHelper (OpenJ9 JDK 16)</title>
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<meta name="keywords" content="isIndexable()">
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<meta name="keywords" content="rawClazz()">
<meta name="keywords" content="clazz()">
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<meta name="keywords" content="stringValue()">
<meta name="keywords" content="getStringField()">
<meta name="keywords" content="getIntField()">
<meta name="keywords" content="getShortField()">
<meta name="keywords" content="getFloatField()">
<meta name="keywords" content="getDoubleField()">
<meta name="keywords" content="getCharField()">
<meta name="keywords" content="getByteField()">
<meta name="keywords" content="getBooleanField()">
<meta name="keywords" content="getLongField()">
<meta name="keywords" content="getObjectField()">
<meta name="keywords" content="getByteFromArrayByIndex()">
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<div class="about-language"><div style="margin-top: 9px;"><strong>OpenJ9 JDK 16</strong></div></div>
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<div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../../../module-summary.html">openj9.dtfj</a></div>
<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">com.ibm.j9ddr.vm29.pointer.helper</a></div>
<h1 title="Class J9ObjectHelper" class="title">Class J9ObjectHelper</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">java.lang.Object</a>
<div class="inheritance">com.ibm.j9ddr.vm29.pointer.helper.J9ObjectHelper</div>
</div>
<section class="description">
<dl class="notes">
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="J9IndexableObjectHelper.html" title="class in com.ibm.j9ddr.vm29.pointer.helper">J9IndexableObjectHelper</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">J9ObjectHelper</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a></span></div>
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<ul class="summary-list">
<!-- =========== FIELD SUMMARY =========== -->
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<section class="field-summary" id="field.summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
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<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static boolean</code></div>
<div class="col-second even-row-color"><code><span class="member-name-link"><a href="#compressObjectReferences">compressObjectReferences</a></span></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>static boolean</code></div>
<div class="col-second odd-row-color"><code><span class="member-name-link"><a href="#mixedReferenceMode">mixedReferenceMode</a></span></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
</div>
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</li>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor.summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><span class="member-name-link"><a href="#%3Cinit%3E()">J9ObjectHelper</a></span>()</code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
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<section class="method-summary" id="method.summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
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<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#clazz(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">clazz</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="../../types/U32.html" title="class in com.ibm.j9ddr.vm29.types">U32</a></code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#flags(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">flags</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getBooleanField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getBooleanField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns an boolean field from the object or its super classes.</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static byte</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getByteField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getByteField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns an byte field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static byte</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getByteFromArrayByIndex(java.lang.Object,int)">getByteFromArrayByIndex</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a>&nbsp;obj,
int&nbsp;index)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static char</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getCharField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getCharField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns a char field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getClassName(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">getClassName</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Return the name of this J9Object's class</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static double</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getDoubleField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getDoubleField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns a double field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static float</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getFloatField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getFloatField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns a float field from the object or its super classes.</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static int</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getIntField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getIntField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns an int field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getJavaName(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">getJavaName</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static long</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getLongField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getLongField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns an long field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getObjectField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getObjectField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns an Object field from the object or its super classes.</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static short</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getShortField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getShortField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns a short field from the object or its super classes.</div>
</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#getStringField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">getStringField</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns a String field from the object or its super classes.</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static long</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#headerSize()">headerSize</a></span>()</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static boolean</code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#isIndexable(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">isIndexable</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">
<div class="block">Returns TRUE if an object is indexable, FALSE otherwise.</div>
</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#monitor(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">monitor</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#rawClazz(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">rawClazz</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static void</code></div>
<div class="col-second odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#reportClassCacheStats()">reportClassCacheStats</a></span>()</code></div>
<div class="col-last odd-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
<div class="col-first even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code>static <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></code></div>
<div class="col-second even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table"><code><span class="member-name-link"><a href="#stringValue(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">stringValue</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</code></div>
<div class="col-last even-row-color method-summary-table-tab1 method-summary-table-tab4 method-summary-table">&nbsp;</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods.inherited.from.class.java.lang.Object">Methods declared in class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link" target="_blank">clone</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link" target="_blank">equals</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link" target="_blank">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link" target="_blank">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link" target="_blank">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link" target="_blank">notify</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link" target="_blank">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link" target="_blank">toString</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link" target="_blank">wait</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link" target="_blank">wait</a>, <a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link" target="_blank">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field.detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="mixedReferenceMode">
<h3>mixedReferenceMode</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">mixedReferenceMode</span></div>
</section>
</li>
<li>
<section class="detail" id="compressObjectReferences">
<h3>compressObjectReferences</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">compressObjectReferences</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor.detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;()">
<h3>J9ObjectHelper</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">J9ObjectHelper</span>()</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method.detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="isIndexable(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>isIndexable</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isIndexable</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns TRUE if an object is indexable, FALSE otherwise.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>objectPtr</code> - Pointer to an object</dd>
<dt>Returns:</dt>
<dd>TRUE if an object is indexable, FALSE otherwise</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="flags(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>flags</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="../../types/U32.html" title="class in com.ibm.j9ddr.vm29.types">U32</a></span>&nbsp;<span class="element-name">flags</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="headerSize()">
<h3>headerSize</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">long</span>&nbsp;<span class="element-name">headerSize</span>()</div>
</section>
</li>
<li>
<section class="detail" id="rawClazz(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>rawClazz</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></span>&nbsp;<span class="element-name">rawClazz</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="clazz(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>clazz</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer</span>&nbsp;<span class="element-name">clazz</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="monitor(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>monitor</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></span>&nbsp;<span class="element-name">monitor</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getClassName(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>getClassName</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></span>&nbsp;<span class="element-name">getClassName</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Return the name of this J9Object's class</div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getJavaName(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>getJavaName</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></span>&nbsp;<span class="element-name">getJavaName</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="stringValue(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer)">
<h3>stringValue</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></span>&nbsp;<span class="element-name">stringValue</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<dl class="notes">
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getStringField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getStringField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link" target="_blank">String</a></span>&nbsp;<span class="element-name">getStringField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns a String field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the String value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getIntField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getIntField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">getIntField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns an int field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the int value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getShortField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getShortField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">short</span>&nbsp;<span class="element-name">getShortField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns a short field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the short value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getFloatField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getFloatField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">float</span>&nbsp;<span class="element-name">getFloatField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns a float field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the float value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getDoubleField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getDoubleField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">double</span>&nbsp;<span class="element-name">getDoubleField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns a double field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the float value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getCharField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getCharField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">char</span>&nbsp;<span class="element-name">getCharField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns a char field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the char value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getByteField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getByteField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">byte</span>&nbsp;<span class="element-name">getByteField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns an byte field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the byte value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getBooleanField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getBooleanField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">getBooleanField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns an boolean field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the boolean value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getLongField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getLongField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">long</span>&nbsp;<span class="element-name">getLongField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns an long field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the long value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getObjectField(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer,com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffset)">
<h3>getObjectField</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer</span>&nbsp;<span class="element-name">getObjectField</span>&#8203;<span class="parameters">(com.ibm.j9ddr.vm29.pointer.generated.J9ObjectPointer&nbsp;objPointer,
<a href="../../j9/J9ObjectFieldOffset.html" title="class in com.ibm.j9ddr.vm29.j9">J9ObjectFieldOffset</a>&nbsp;offset)</span>
throws <span class="exceptions"><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></span></div>
<div class="block">Returns an Object field from the object or its super classes. The field may be
a static field or an instance field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>offset</code> - the offset of the field to return</dd>
<dt>Returns:</dt>
<dd>the J9Object value of the field</dd>
<dt>Throws:</dt>
<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code> - if there is a problem reading the underlying data from the core file</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getByteFromArrayByIndex(java.lang.Object,int)">
<h3>getByteFromArrayByIndex</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">byte</span>&nbsp;<span class="element-name">getByteFromArrayByIndex</span>&#8203;<span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link" target="_blank">Object</a>&nbsp;obj,
int&nbsp;index)</span></div>
</section>
</li>
<li>
<section class="detail" id="reportClassCacheStats()">
<h3>reportClassCacheStats</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">reportClassCacheStats</span>()</div>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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