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<h2 title="Interface ICommand" class="title">Interface ICommand</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../../vm29/tools/ddrinteractive/commands/ACCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ACCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/AllClassesCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">AllClassesCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/AnalyseRomClassUTF8Command.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">AnalyseRomClassUTF8Command</a></code>, <code><a href="BaseStructureCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">BaseStructureCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/BuildFlagsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">BuildFlagsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/BytecodesCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">BytecodesCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ClassForNameCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ClassForNameCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ClassloadersSummaryCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ClassloadersSummaryCommand</a></code>, <code><a href="Command.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">Command</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/CompressedRefMappingCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">CompressedRefMappingCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/CoreInfoCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">CoreInfoCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/CPDescriptionCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">CPDescriptionCommand</a></code>, <code><a href="DDRInteractive.ContextCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">DDRInteractive.ContextCommand</a></code>, <code><a href="DDRInteractive.J9HelpCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">DDRInteractive.J9HelpCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/DumpAllClassesInModuleCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">DumpAllClassesInModuleCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/DumpAllClassloadersCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">DumpAllClassloadersCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/DumpAllRamClassLinearCommand.html" title="class in 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href="FindInMemoryCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">FindInMemoryCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindMethodFromPcCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindMethodFromPcCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindModuleByNameCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindModuleByNameCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindModulesCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindModulesCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindOverlappingSegmentsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindOverlappingSegmentsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindPatternCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindPatternCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindStackValueCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindStackValueCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FindVMCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FindVMCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/FlatObjectCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">FlatObjectCommand</a></code>, <code><a href="commands/ForeachCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">ForeachCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/GCCheckCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">GCCheckCommand</a></code>, <code><a href="commands/GpInfoCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">GpInfoCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/HashCodeCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">HashCodeCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ITableSizeCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ITableSizeCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/J9ClassShapeCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">J9ClassShapeCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/J9MemTagCommands.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">J9MemTagCommands</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/J9StaticsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">J9StaticsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/J9VTablesCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">J9VTablesCommand</a></code>, <code><a href="J9XCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">J9XCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/JextractCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">JextractCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/JitMetadataFromPcCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">JitMetadataFromPcCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/JitstackCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">JitstackCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/LocalMapCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">LocalMapCommand</a></code>, <code><a href="commands/LookupSymbolCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">LookupSymbolCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/MarkMapCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">MarkMapCommand</a></code>, <code><a href="MemoryRangesCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">MemoryRangesCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/MethodForNameCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">MethodForNameCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/MonitorsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">MonitorsCommand</a></code>, <code><a href="commands/NativeLibrariesCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">NativeLibrariesCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/NativeMemInfoCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">NativeMemInfoCommand</a></code>, <code><a href="commands/NativeStacksCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">NativeStacksCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ObjectRefsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ObjectRefsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ObjectSizeInfo.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ObjectSizeInfo</a></code>, <code><a href="plugins/PluginCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.plugins">PluginCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/QueryRomClassCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">QueryRomClassCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/RamClassSummaryCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">RamClassSummaryCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/RomClassForNameCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">RomClassForNameCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/RomClassSummaryCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">RomClassSummaryCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/RootPathCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">RootPathCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/RuntimeSettingsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">RuntimeSettingsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/SearchStringTableCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">SearchStringTableCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/SetVMCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">SetVMCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ShowDumpAgentsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ShowDumpAgentsCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ShrCCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ShrCCommand</a></code>, <code><a href="commands/SnapBaseCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">SnapBaseCommand</a></code>, <code><a href="commands/SnapFormatCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">SnapFormatCommand</a></code>, <code><a href="commands/SnapFormatWrapperCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">SnapFormatWrapperCommand</a></code>, <code><a href="commands/SnapTraceCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">SnapTraceCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/StackmapCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">StackmapCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/StackWalkCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">StackWalkCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/StructureCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive">StructureCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/ThreadsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive">ThreadsCommand</a></code>, <code><a href="commands/TimeCommand.html" title="class in com.ibm.j9ddr.tools.ddrinteractive.commands">TimeCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/TraceConfigCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">TraceConfigCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/TrPrintCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">TrPrintCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/ValidateTraceFreeQueueCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">ValidateTraceFreeQueueCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/VmCheckCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">VmCheckCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/VMConstantPoolCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">VMConstantPoolCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/WalkInternTableCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">WalkInternTableCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/WalkJ9PoolCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">WalkJ9PoolCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/commands/WalkUtThreadDataCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive.commands">WalkUtThreadDataCommand</a></code>, <code><a href="../../vm29/tools/ddrinteractive/WhatIsCommand.html" title="class in com.ibm.j9ddr.vm29.tools.ddrinteractive">WhatIsCommand</a></code></dd>
</dl>
<hr>
<pre>public interface <span class="typeNameLabel">ICommand</span></pre>
<div class="block">Interface for DDR Interactive commands.</div>
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<!-- ========== METHOD SUMMARY =========== -->
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<h3>Method Summary</h3>
<table class="memberSummary">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink" target="_blank">Collection</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCommandDescriptions()">getCommandDescriptions</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink" target="_blank">Collection</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCommandNames()">getCommandNames</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#recognises(java.lang.String,com.ibm.j9ddr.tools.ddrinteractive.Context)">recognises</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;command,
<a href="Context.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">Context</a>&nbsp;context)</code></th>
<td class="colLast">
<div class="block">Method used by the DDR Interactive engine to decide whether this command
matches the command passed in by the user</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#run(java.lang.String,java.lang.String%5B%5D,com.ibm.j9ddr.tools.ddrinteractive.Context,java.io.PrintStream)">run</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;command,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>[]&nbsp;args,
<a href="Context.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">Context</a>&nbsp;context,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/PrintStream.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">PrintStream</a>&nbsp;out)</code></th>
<td class="colLast">
<div class="block">Executes the command</div>
</td>
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<h3>Method Detail</h3>
<a id="recognises(java.lang.String,com.ibm.j9ddr.tools.ddrinteractive.Context)">
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<h4>recognises</h4>
<pre class="methodSignature">boolean&nbsp;recognises&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;command,
<a href="Context.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">Context</a>&nbsp;context)</pre>
<div class="block">Method used by the DDR Interactive engine to decide whether this command
matches the command passed in by the user</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>command</code> - Command string entered by user. e.g. !j9x</dd>
<dd><code>context</code> - Current DDRInteractive context</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>True if this command object can process the supplied command (in which case the DDR engine will then call run())</dd>
</dl>
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<a id="run(java.lang.String,java.lang.String[],com.ibm.j9ddr.tools.ddrinteractive.Context,java.io.PrintStream)">
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<h4>run</h4>
<pre class="methodSignature">void&nbsp;run&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;command,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>[]&nbsp;args,
<a href="Context.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">Context</a>&nbsp;context,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/PrintStream.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">PrintStream</a>&nbsp;out)
throws <a href="DDRInteractiveCommandException.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">DDRInteractiveCommandException</a></pre>
<div class="block">Executes the command</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>command</code> - Command string e.g. !j9x</dd>
<dd><code>args</code> - Arguments for command</dd>
<dd><code>context</code> - Context to work in</dd>
<dd><code>out</code> - PrintStream to write command output on</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="DDRInteractiveCommandException.html" title="class in com.ibm.j9ddr.tools.ddrinteractive">DDRInteractiveCommandException</a></code> - If there is any problem running the command (incorrect usage, CorruptData etc.)</dd>
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<h4>getCommandDescriptions</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink" target="_blank">Collection</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&gt;&nbsp;getCommandDescriptions()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Strings to be inserted in !j9help output</dd>
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<h4>getCommandNames</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html?is-external=true" title="class or interface in java.util" class="externalLink" target="_blank">Collection</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&gt;&nbsp;getCommandNames()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Strings containing command names</dd>
</dl>
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