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<!DOCTYPE HTML>
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<!-- Generated by javadoc (21) on Tue Nov 11 15:21:53 CST 2025 -->
<title>MinimalECIInput (ZXing 3.5.4 API)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">com.google.zxing.common</a></div>
<h1 title="Class MinimalECIInput" class="title">Class MinimalECIInput</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">com.google.zxing.common.MinimalECIInput</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">MinimalECIInput</span>
<span class="extends-implements">extends <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>
implements <a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></span></div>
<div class="block">Class that converts a character string into a sequence of ECIs and bytes
The implementation uses the Dijkstra algorithm to produce minimal encodings</div>
<dl class="notes">
<dt>Author:</dt>
<dd>Alex Geller</dd>
</dl>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== 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><a href="#%3Cinit%3E(java.lang.String,java.nio.charset.Charset,int)" class="member-name-link">MinimalECIInput</a><wbr>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> stringToEncode,
<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="external-link">Charset</a> priorityCharset,
int fnc1)</code></div>
<div class="col-last even-row-color">
<div class="block">Constructs a minimal input</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-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>
<div id="method-summary-table.tabpanel" role="tabpanel" aria-labelledby="method-summary-table-tab0">
<div class="summary-table three-column-summary">
<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-tab2 method-summary-table-tab4"><code>char</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#charAt(int)" class="member-name-link">charAt</a><wbr>(int index)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the <code>byte</code> value at the specified index.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getECIValue(int)" class="member-name-link">getECIValue</a><wbr>(int index)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the <code>int</code> ECI value at the specified index.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getFNC1Character()" class="member-name-link">getFNC1Character</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#haveNCharacters(int,int)" class="member-name-link">haveNCharacters</a><wbr>(int index,
int n)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isECI(int)" class="member-name-link">isECI</a><wbr>(int index)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Determines if a value is an ECI</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isFNC1(int)" class="member-name-link">isFNC1</a><wbr>(int index)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Determines if a value is the FNC1 character</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#length()" class="member-name-link">length</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns the length of this input.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/CharSequence.html" title="class or interface in java.lang" class="external-link">CharSequence</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#subSequence(int,int)" class="member-name-link">subSequence</a><wbr>(int start,
int end)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns a <code>CharSequence</code> that is a subsequence of this sequence.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#toString()" class="member-name-link">toString</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class 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#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">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="<init>(java.lang.String,java.nio.charset.Charset,int)">
<h3>MinimalECIInput</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="element-name">MinimalECIInput</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> stringToEncode,
<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="external-link">Charset</a> priorityCharset,
int fnc1)</span></div>
<div class="block">Constructs a minimal input</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>stringToEncode</code> - the character string to encode</dd>
<dd><code>priorityCharset</code> - The preferred <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html" title="class or interface in java.nio.charset" class="external-link"><code>Charset</code></a>. When the value of the argument is null, the algorithm
chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
charset to encode any character in the input that can be encoded by it if the charset is among the
supported charsets.</dd>
<dd><code>fnc1</code> - denotes the character in the input that represents the FNC1 character or -1 if this is not GS1
input.</dd>
</dl>
</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="getFNC1Character()">
<h3>getFNC1Character</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">getFNC1Character</span>()</div>
</section>
</li>
<li>
<section class="detail" id="length()">
<h3>length</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">length</span>()</div>
<div class="block">Returns the length of this input. The length is the number
of <code>byte</code>s, FNC1 characters or ECIs in the sequence.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#length()">length</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
<dt>Returns:</dt>
<dd>the number of <code>char</code>s in this sequence</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="haveNCharacters(int,int)">
<h3>haveNCharacters</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">haveNCharacters</span><wbr><span class="parameters">(int index,
int n)</span></div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#haveNCharacters(int,int)">haveNCharacters</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="charAt(int)">
<h3>charAt</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">char</span> <span class="element-name">charAt</span><wbr><span class="parameters">(int index)</span></div>
<div class="block">Returns the <code>byte</code> value at the specified index. An index ranges from zero
to <code>length() - 1</code>. The first <code>byte</code> value of the sequence is at
index zero, the next at index one, and so on, as for array
indexing.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#charAt(int)">charAt</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
<dt>Parameters:</dt>
<dd><code>index</code> - the index of the <code>byte</code> value to be returned</dd>
<dt>Returns:</dt>
<dd>the specified <code>byte</code> value as character or the FNC1 character</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang" class="external-link">IndexOutOfBoundsException</a></code> - if the <code>index</code> argument is negative or not less than
<code>length()</code></dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="external-link">IllegalArgumentException</a></code> - if the value at the <code>index</code> argument is an ECI (@see #isECI)</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="subSequence(int,int)">
<h3>subSequence</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/CharSequence.html" title="class or interface in java.lang" class="external-link">CharSequence</a></span> <span class="element-name">subSequence</span><wbr><span class="parameters">(int start,
int end)</span></div>
<div class="block">Returns a <code>CharSequence</code> that is a subsequence of this sequence.
The subsequence starts with the <code>char</code> value at the specified index and
ends with the <code>char</code> value at index <code>end - 1</code>. The length
(in <code>char</code>s) of the
returned sequence is <code>end - start</code>, so if <code>start == end</code>
then an empty sequence is returned.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#subSequence(int,int)">subSequence</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
<dt>Parameters:</dt>
<dd><code>start</code> - the start index, inclusive</dd>
<dd><code>end</code> - the end index, exclusive</dd>
<dt>Returns:</dt>
<dd>the specified subsequence</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang" class="external-link">IndexOutOfBoundsException</a></code> - if <code>start</code> or <code>end</code> are negative,
if <code>end</code> is greater than <code>length()</code>,
or if <code>start</code> is greater than <code>end</code></dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="external-link">IllegalArgumentException</a></code> - if a value in the range <code>start</code>-<code>end</code> is an ECI (@see #isECI)</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isECI(int)">
<h3>isECI</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">isECI</span><wbr><span class="parameters">(int index)</span></div>
<div class="block">Determines if a value is an ECI</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#isECI(int)">isECI</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
<dt>Parameters:</dt>
<dd><code>index</code> - the index of the value</dd>
<dt>Returns:</dt>
<dd>true if the value at position <code>index</code> is an ECI</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang" class="external-link">IndexOutOfBoundsException</a></code> - if the <code>index</code> argument is negative or not less than
<code>length()</code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isFNC1(int)">
<h3>isFNC1</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">isFNC1</span><wbr><span class="parameters">(int index)</span></div>
<div class="block">Determines if a value is the FNC1 character</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>index</code> - the index of the value</dd>
<dt>Returns:</dt>
<dd>true if the value at position <code>index</code> is the FNC1 character</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang" class="external-link">IndexOutOfBoundsException</a></code> - if the <code>index</code> argument is negative or not less than
<code>length()</code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getECIValue(int)">
<h3>getECIValue</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">getECIValue</span><wbr><span class="parameters">(int index)</span></div>
<div class="block">Returns the <code>int</code> ECI value at the specified index. An index ranges from zero
to <code>length() - 1</code>. The first <code>byte</code> value of the sequence is at
index zero, the next at index one, and so on, as for array
indexing.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="ECIInput.html#getECIValue(int)">getECIValue</a></code> in interface <code><a href="ECIInput.html" title="interface in com.google.zxing.common">ECIInput</a></code></dd>
<dt>Parameters:</dt>
<dd><code>index</code> - the index of the <code>int</code> value to be returned</dd>
<dt>Returns:</dt>
<dd>the specified <code>int</code> ECI value.
The ECI specified the encoding of all bytes with a higher index until the
next ECI or until the end of the input if no other ECI follows.</dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html" title="class or interface in java.lang" class="external-link">IndexOutOfBoundsException</a></code> - if the <code>index</code> argument is negative or not less than
<code>length()</code></dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="external-link">IllegalArgumentException</a></code> - if the value at the <code>index</code> argument is not an ECI (@see #isECI)</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="toString()">
<h3>toString</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span> <span class="element-name">toString</span>()</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><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></code> in class <code><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></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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