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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.logging.log4j.core.util</a></div>
<h1 title="Class NullOutputStream" class="title">Class NullOutputStream</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance"><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">java.io.OutputStream</a>
<div class="inheritance">org.apache.logging.log4j.core.util.NullOutputStream</div>
</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code>, <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Flushable.html" title="class or interface in java.io" class="external-link">Flushable</a></code>, <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">NullOutputStream</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">OutputStream</a></span></div>
<div class="block">Writes all data to the famous <b>/dev/null</b>.
<p>
This output stream has no destination (file/socket etc.) and all bytes written to it are ignored and lost.
</p>
Originally from Apache Commons IO.</div>
<dl class="notes">
<dt>Since:</dt>
<dd>2.3</dd>
</dl>
</section>
<section class="summary">
<ul class="summary-list">
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<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 final <a href="NullOutputStream.html" title="class in org.apache.logging.log4j.core.util">NullOutputStream</a></code></div>
<div class="col-second even-row-color"><code><a href="#NULL_OUTPUT_STREAM" class="member-name-link">NULL_OUTPUT_STREAM</a></code></div>
<div class="col-last even-row-color">
<div class="block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Deprecated in 2.7: use <a href="#getInstance()"><code>getInstance()</code></a>.</div>
</div>
</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<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-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance 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="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 method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="NullOutputStream.html" title="class in org.apache.logging.log4j.core.util">NullOutputStream</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getInstance()" class="member-name-link">getInstance</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Gets the singleton instance.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#write(byte%5B%5D)" class="member-name-link">write</a><wbr>(byte[]&nbsp;b)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#write(byte%5B%5D,int,int)" class="member-name-link">write</a><wbr>(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#write(int)" class="member-name-link">write</a><wbr>(int&nbsp;b)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.io.OutputStream">Methods inherited from class&nbsp;java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">OutputStream</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html#close--" title="class or interface in java.io" class="external-link">close</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html#flush--" title="class or interface in java.io" class="external-link">flush</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone--" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#finalize--" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-" title="class or interface in java.lang" class="external-link">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="NULL_OUTPUT_STREAM">
<h3>NULL_OUTPUT_STREAM</h3>
<div class="member-signature"><span class="annotations"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html" title="class or interface in java.lang" class="external-link">@Deprecated</a>
</span><span class="modifiers">public static final</span>&nbsp;<span class="return-type"><a href="NullOutputStream.html" title="class in org.apache.logging.log4j.core.util">NullOutputStream</a></span>&nbsp;<span class="element-name">NULL_OUTPUT_STREAM</span></div>
<div class="deprecation-block"><span class="deprecated-label">Deprecated.</span>
<div class="deprecation-comment">Deprecated in 2.7: use <a href="#getInstance()"><code>getInstance()</code></a>.</div>
</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="getInstance()">
<h3>getInstance</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="NullOutputStream.html" title="class in org.apache.logging.log4j.core.util">NullOutputStream</a></span>&nbsp;<span class="element-name">getInstance</span>()</div>
<div class="block">Gets the singleton instance.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>the singleton instance.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="write(byte[],int,int)">
<h3>write</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">write</span><wbr><span class="parameters">(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)</span></div>
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html#write-byte:A-int-int-" title="class or interface in java.io" class="external-link">write</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">OutputStream</a></code></dd>
<dt>Parameters:</dt>
<dd><code>b</code> - The bytes to write</dd>
<dd><code>off</code> - The start offset</dd>
<dd><code>len</code> - The number of bytes to write</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="write(int)">
<h3>write</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">write</span><wbr><span class="parameters">(int&nbsp;b)</span></div>
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html#write-int-" title="class or interface in java.io" class="external-link">write</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">OutputStream</a></code></dd>
<dt>Parameters:</dt>
<dd><code>b</code> - The byte to write</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="write(byte[])">
<h3>write</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">write</span><wbr><span class="parameters">(byte[]&nbsp;b)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
<div class="block">Does nothing - output to <code>/dev/null</code>.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html#write-byte:A-" title="class or interface in java.io" class="external-link">write</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html" title="class or interface in java.io" class="external-link">OutputStream</a></code></dd>
<dt>Parameters:</dt>
<dd><code>b</code> - The bytes to write</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - never</dd>
</dl>
</section>
</li>
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