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<!-- Generated by javadoc (11.0.27) on Thu Jan 08 12:43:42 CET 2026 -->
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<title>BitOutputStream</title>
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<script type="text/javascript"><!--
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if (location.href.indexOf('is-external=true') == -1) {
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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">fr.iutfbleau.sae.mpif</a></div>
<h2 title="Class BitOutputStream" class="title">Class BitOutputStream</h2>
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<div class="contentContainer">
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<pre>public class <span class="typeNameLabel">BitOutputStream</span>
extends java.lang.Object</pre>
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<div class="block">Décorateur de flux permettant l'écriture binaire à granularité du bit.
<p>
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Cette classe encapsule un <code>OutputStream</code> existant et permet
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l'écriture de bits individuellement ou par groupes.
Les bits sont accumulés afin de former des octets avant écriture.
</p>
<p>
Utilisée notamment pour l'encodage des fichiers compressés
(ex : format PIF utilisant des codes de Huffman).
</p></div>
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<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
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<dd>2025-12-13</dd>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.io.OutputStream)">BitOutputStream</a></span>&#8203;(java.io.OutputStream&nbsp;fluxSortie)</code></th>
<td class="colLast">
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<div class="block">Construit un écrivain binaire à partir d'un flux existant.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#fermerFlux()">fermerFlux</a></span>()</code></th>
<td class="colLast">
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<div class="block">Vide les buffers internes et ferme le flux de sortie.</div>
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</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#flush()">flush</a></span>()</code></th>
<td class="colLast">
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<div class="block">Force l'écriture immédiate des données accumulées dans le flux sous-jacent.</div>
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</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#writeBit(int)">writeBit</a></span>&#8203;(int&nbsp;bit)</code></th>
<td class="colLast">
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<div class="block">Écrit un bit dans le flux binaire.</div>
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</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="#writeBits(int,int)">writeBits</a></span>&#8203;(int&nbsp;valeur,
int&nbsp;nombreBits)</code></th>
<td class="colLast">
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<div class="block">Écrit une séquence de bits correspondant à une valeur entière.</div>
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</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#writeBitString(java.lang.String)">writeBitString</a></span>&#8203;(java.lang.String&nbsp;codeBinaire)</code></th>
<td class="colLast">
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<div class="block">Écrit une séquence de bits à partir d'une chaîne de '0' et '1'.</div>
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</td>
</tr>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
</ul>
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<h4>BitOutputStream</h4>
<pre>public&nbsp;BitOutputStream&#8203;(java.io.OutputStream&nbsp;fluxSortie)</pre>
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<div class="block">Construit un écrivain binaire à partir d'un flux existant.</div>
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>fluxSortie</code> - flux de sortie à décorer</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - si le flux est nul</dd>
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</dl>
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<h4>writeBit</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;writeBit&#8203;(int&nbsp;bit)
throws java.io.IOException</pre>
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<div class="block">Écrit un bit dans le flux binaire.</div>
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>bit</code> - bit à écrire (0 ou 1)</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - si une erreur d'écriture survient</dd>
<dd><code>java.lang.IllegalArgumentException</code> - si le bit n'est ni 0 ni 1</dd>
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<h4>writeBits</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;writeBits&#8203;(int&nbsp;valeur,
int&nbsp;nombreBits)
throws java.io.IOException</pre>
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<div class="block">Écrit une séquence de bits correspondant à une valeur entière.</div>
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>valeur</code> - valeur contenant les bits à écrire</dd>
<dd><code>nombreBits</code> - nombre de bits à écrire (strictement positif)</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - si une erreur d'écriture survient</dd>
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</dl>
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<pre class="methodSignature">public&nbsp;void&nbsp;flush()
throws java.io.IOException</pre>
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<div class="block">Force l'écriture immédiate des données accumulées dans le flux sous-jacent.</div>
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - si une erreur survient lors du flush</dd>
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</dl>
</li>
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<h4>writeBitString</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;writeBitString&#8203;(java.lang.String&nbsp;codeBinaire)
throws java.io.IOException</pre>
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<div class="block">Écrit une séquence de bits à partir d'une chaîne de '0' et '1'.</div>
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>codeBinaire</code> - chaîne contenant uniquement '0' et '1'</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - si une erreur d'écriture survient</dd>
<dd><code>java.lang.IllegalArgumentException</code> - si la chaîne contient autre chose que '0' ou '1'</dd>
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</dl>
</li>
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<h4>fermerFlux</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;fermerFlux()
throws java.io.IOException</pre>
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<div class="block">Vide les buffers internes et ferme le flux de sortie.</div>
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<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code> - si une erreur survient lors de la fermeture</dd>
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