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<h2 title="Class CommandLine.HelpCommand" class="title">Class CommandLine.HelpCommand</h2>
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<li>picocli.CommandLine.HelpCommand</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a>, <a href="../picocli/CommandLine.IHelpCommandInitializable.html" title="interface in picocli">CommandLine.IHelpCommandInitializable</a>, <a href="../picocli/CommandLine.IHelpCommandInitializable2.html" title="interface in picocli">CommandLine.IHelpCommandInitializable2</a></dd>
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<dt>Enclosing class:</dt>
<dd><a href="../picocli/CommandLine.html" title="class in picocli">CommandLine</a></dd>
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<br>
<pre>public static final class <span class="typeNameLabel">CommandLine.HelpCommand</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../picocli/CommandLine.IHelpCommandInitializable.html" title="interface in picocli">CommandLine.IHelpCommandInitializable</a>, <a href="../picocli/CommandLine.IHelpCommandInitializable2.html" title="interface in picocli">CommandLine.IHelpCommandInitializable2</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></pre>
<div class="block">Help command that can be installed as a subcommand on all application commands. When invoked with a subcommand
 argument, it prints usage help for the specified subcommand. For example:<pre>

 // print help for subcommand
 command help subcommand
 </pre><p>
 When invoked without additional parameters, it prints usage help for the parent command. For example:
 </p><pre>

 // print help for command
 command help
 </pre>
 For <a href="../picocli/CommandLine.Model.Messages.html" title="class in picocli">internationalization</a>: this command has a <code>--help</code> option with <code>descriptionKey = "helpCommand.help"</code>,
 and a <code>COMMAND</code> positional parameter with <code>descriptionKey = "helpCommand.command"</code>.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>3.0</dd>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../picocli/CommandLine.HelpCommand.html#HelpCommand--">HelpCommand</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../picocli/CommandLine.HelpCommand.html#init-picocli.CommandLine-picocli.CommandLine.Help.Ansi-java.io.PrintStream-java.io.PrintStream-">init</a></span>(<a href="../picocli/CommandLine.html" title="class in picocli">CommandLine</a>&nbsp;helpCommandLine,
    <a href="../picocli/CommandLine.Help.Ansi.html" title="enum in picocli">CommandLine.Help.Ansi</a>&nbsp;ansi,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;out,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;err)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../picocli/CommandLine.HelpCommand.html#init-picocli.CommandLine-picocli.CommandLine.Help.ColorScheme-java.io.PrintWriter-java.io.PrintWriter-">init</a></span>(<a href="../picocli/CommandLine.html" title="class in picocli">CommandLine</a>&nbsp;helpCommandLine,
    <a href="../picocli/CommandLine.Help.ColorScheme.html" title="class in picocli">CommandLine.Help.ColorScheme</a>&nbsp;colorScheme,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;out,
    <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;err)</code>
<div class="block">Initializes this object with the information needed to implement a help command that provides usage help for other commands.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../picocli/CommandLine.HelpCommand.html#run--">run</a></span>()</code>
<div class="block">Invokes <a href="../picocli/CommandLine.html#usage-java.io.PrintStream-picocli.CommandLine.Help.ColorScheme-"><code>usage</code></a> for the specified command, or for the parent command.</div>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>HelpCommand</h4>
<pre>public&nbsp;HelpCommand()</pre>
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<h4>run</h4>
<pre>public&nbsp;void&nbsp;run()</pre>
<div class="block">Invokes <a href="../picocli/CommandLine.html#usage-java.io.PrintStream-picocli.CommandLine.Help.ColorScheme-"><code>usage</code></a> for the specified command, or for the parent command.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true#run--" title="class or interface in java.lang">run</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></code></dd>
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<h4>init</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public&nbsp;void&nbsp;init(<a href="../picocli/CommandLine.html" title="class in picocli">CommandLine</a>&nbsp;helpCommandLine,
                              <a href="../picocli/CommandLine.Help.Ansi.html" title="enum in picocli">CommandLine.Help.Ansi</a>&nbsp;ansi,
                              <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;out,
                              <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;err)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Initializes this object with the information needed to implement a help command that provides usage help for other commands.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../picocli/CommandLine.IHelpCommandInitializable.html#init-picocli.CommandLine-picocli.CommandLine.Help.Ansi-java.io.PrintStream-java.io.PrintStream-">init</a></code>&nbsp;in interface&nbsp;<code><a href="../picocli/CommandLine.IHelpCommandInitializable.html" title="interface in picocli">CommandLine.IHelpCommandInitializable</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>helpCommandLine</code> - the <code>CommandLine</code> object associated with this help command. Implementors can use
                        this to walk the command hierarchy and get access to the help command's parent and sibling commands.</dd>
<dd><code>ansi</code> - whether to use Ansi colors or not</dd>
<dd><code>out</code> - the stream to print the usage help message to</dd>
<dd><code>err</code> - the error stream to print any diagnostic messages to, in addition to the output from the exception handler</dd>
</dl>
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<h4>init</h4>
<pre>public&nbsp;void&nbsp;init(<a href="../picocli/CommandLine.html" title="class in picocli">CommandLine</a>&nbsp;helpCommandLine,
                 <a href="../picocli/CommandLine.Help.ColorScheme.html" title="class in picocli">CommandLine.Help.ColorScheme</a>&nbsp;colorScheme,
                 <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;out,
                 <a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintWriter.html?is-external=true" title="class or interface in java.io">PrintWriter</a>&nbsp;err)</pre>
<div class="block">Initializes this object with the information needed to implement a help command that provides usage help for other commands.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../picocli/CommandLine.IHelpCommandInitializable2.html#init-picocli.CommandLine-picocli.CommandLine.Help.ColorScheme-java.io.PrintWriter-java.io.PrintWriter-">init</a></code>&nbsp;in interface&nbsp;<code><a href="../picocli/CommandLine.IHelpCommandInitializable2.html" title="interface in picocli">CommandLine.IHelpCommandInitializable2</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>helpCommandLine</code> - the <code>CommandLine</code> object associated with this help command. Implementors can use
                        this to walk the command hierarchy and get access to the help command's parent and sibling commands.</dd>
<dd><code>colorScheme</code> - the color scheme to use when printing help, including whether to use Ansi colors or not</dd>
<dd><code>out</code> - the output writer to print the usage help message to</dd>
<dd><code>err</code> - the error writer to print any diagnostic messages to, in addition to the output from the exception handler</dd>
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