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<!DOCTYPE HTML>
<!-- NewPage -->
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<!-- Generated by javadoc -->
<title>Base64 (Java SE 12 & JDK 12 )</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="keywords" content="java.util.Base64 class">
<meta name="keywords" content="getEncoder()">
<meta name="keywords" content="getUrlEncoder()">
<meta name="keywords" content="getMimeEncoder()">
<meta name="keywords" content="getDecoder()">
<meta name="keywords" content="getUrlDecoder()">
<meta name="keywords" content="getMimeDecoder()">
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<h2 title="Class Base64" class="title">Class Base64</h2>
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<pre>public class <span class="typeNameLabel">Base64</span>
extends <a href="../lang/Object.html" title="class in java.lang">Object</a></pre>
<div class="block">This class consists exclusively of static methods for obtaining
encoders and decoders for the Base64 encoding scheme. The
implementation of this class supports the following types of Base64
as specified in
<a href="http://www.ietf.org/rfc/rfc4648.txt">RFC 4648</a> and
<a href="http://www.ietf.org/rfc/rfc2045.txt">RFC 2045</a>.
<ul>
<li><a id="basic"><b>Basic</b></a>
<p> Uses "The Base64 Alphabet" as specified in Table 1 of
RFC 4648 and RFC 2045 for encoding and decoding operation.
The encoder does not add any line feed (line separator)
character. The decoder rejects data that contains characters
outside the base64 alphabet.</p></li>
<li><a id="url"><b>URL and Filename safe</b></a>
<p> Uses the "URL and Filename safe Base64 Alphabet" as specified
in Table 2 of RFC 4648 for encoding and decoding. The
encoder does not add any line feed (line separator) character.
The decoder rejects data that contains characters outside the
base64 alphabet.</p></li>
<li><a id="mime"><b>MIME</b></a>
<p> Uses "The Base64 Alphabet" as specified in Table 1 of
RFC 2045 for encoding and decoding operation. The encoded output
must be represented in lines of no more than 76 characters each
and uses a carriage return <code>'\r'</code> followed immediately by
a linefeed <code>'\n'</code> as the line separator. No line separator
is added to the end of the encoded output. All line separators
or other characters not found in the base64 alphabet table are
ignored in decoding operation.</p></li>
</ul>
<p> Unless otherwise noted, passing a <code>null</code> argument to a
method of this class will cause a <a href="../lang/NullPointerException.html" title="class in java.lang"><code>NullPointerException</code></a> to be thrown.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.8</dd>
</dl>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Class</th>
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<td class="colFirst"><code>static class </code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a></span></code></th>
<td class="colLast">
<div class="block">This class implements a decoder for decoding byte data using the
Base64 encoding scheme as specified in RFC 4648 and RFC 2045.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static class </code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a></span></code></th>
<td class="colLast">
<div class="block">This class implements an encoder for encoding byte data using
the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.</div>
</td>
</tr>
</tbody>
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<tr class="altColor" id="i0">
<td class="colFirst"><code>static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDecoder()">getDecoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#basic">Basic</a> type base64 encoding scheme.</div>
</td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code>static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getEncoder()">getEncoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#basic">Basic</a> type base64 encoding scheme.</div>
</td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code>static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMimeDecoder()">getMimeDecoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#mime">MIME</a> type base64 decoding scheme.</div>
</td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code>static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMimeEncoder()">getMimeEncoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#mime">MIME</a> type base64 encoding scheme.</div>
</td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code>static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMimeEncoder(int,byte%5B%5D)">getMimeEncoder</a></span>​(int lineLength,
byte[] lineSeparator)</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#mime">MIME</a> type base64 encoding scheme
with specified line length and line separators.</div>
</td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code>static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUrlDecoder()">getUrlDecoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#url">URL and Filename safe</a> type base64
encoding scheme.</div>
</td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code>static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUrlEncoder()">getUrlEncoder</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#url">URL and Filename safe</a> type base64
encoding scheme.</div>
</td>
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<h3>Methods declared in class java.lang.<a href="../lang/Object.html" title="class in java.lang">Object</a></h3>
<code><a href="../lang/Object.html#clone()">clone</a>, <a href="../lang/Object.html#equals(java.lang.Object)">equals</a>, <a href="../lang/Object.html#finalize()">finalize</a>, <a href="../lang/Object.html#getClass()">getClass</a>, <a href="../lang/Object.html#hashCode()">hashCode</a>, <a href="../lang/Object.html#notify()">notify</a>, <a href="../lang/Object.html#notifyAll()">notifyAll</a>, <a href="../lang/Object.html#toString()">toString</a>, <a href="../lang/Object.html#wait()">wait</a>, <a href="../lang/Object.html#wait(long)">wait</a>, <a href="../lang/Object.html#wait(long,int)">wait</a></code></li>
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<h4>getEncoder</h4>
<pre class="methodSignature">public static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a> getEncoder()</pre>
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#basic">Basic</a> type base64 encoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 encoder.</dd>
</dl>
</li>
</ul>
<a id="getUrlEncoder()">
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<h4>getUrlEncoder</h4>
<pre class="methodSignature">public static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a> getUrlEncoder()</pre>
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#url">URL and Filename safe</a> type base64
encoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 encoder.</dd>
</dl>
</li>
</ul>
<a id="getMimeEncoder()">
<!-- -->
</a>
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<li class="blockList">
<h4>getMimeEncoder</h4>
<pre class="methodSignature">public static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a> getMimeEncoder()</pre>
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#mime">MIME</a> type base64 encoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 encoder.</dd>
</dl>
</li>
</ul>
<a id="getMimeEncoder(int,byte[])">
<!-- -->
</a>
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<h4>getMimeEncoder</h4>
<pre class="methodSignature">public static <a href="Base64.Encoder.html" title="class in java.util">Base64.Encoder</a> getMimeEncoder​(int lineLength,
byte[] lineSeparator)</pre>
<div class="block">Returns a <a href="Base64.Encoder.html" title="class in java.util"><code>Base64.Encoder</code></a> that encodes using the
<a href="#mime">MIME</a> type base64 encoding scheme
with specified line length and line separators.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>lineLength</code> - the length of each output line (rounded down to nearest multiple
of 4). If the rounded down line length is not a positive value,
the output will not be separated in lines</dd>
<dd><code>lineSeparator</code> - the line separator for each output line</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 encoder.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - if <code>lineSeparator</code> includes any
character of "The Base64 Alphabet" as specified in Table 1 of
RFC 2045.</dd>
</dl>
</li>
</ul>
<a id="getDecoder()">
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<h4>getDecoder</h4>
<pre class="methodSignature">public static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a> getDecoder()</pre>
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#basic">Basic</a> type base64 encoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 decoder.</dd>
</dl>
</li>
</ul>
<a id="getUrlDecoder()">
<!-- -->
</a>
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<h4>getUrlDecoder</h4>
<pre class="methodSignature">public static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a> getUrlDecoder()</pre>
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#url">URL and Filename safe</a> type base64
encoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 decoder.</dd>
</dl>
</li>
</ul>
<a id="getMimeDecoder()">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>getMimeDecoder</h4>
<pre class="methodSignature">public static <a href="Base64.Decoder.html" title="class in java.util">Base64.Decoder</a> getMimeDecoder()</pre>
<div class="block">Returns a <a href="Base64.Decoder.html" title="class in java.util"><code>Base64.Decoder</code></a> that decodes using the
<a href="#mime">MIME</a> type base64 decoding scheme.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A Base64 decoder.</dd>
</dl>
</li>
</ul>
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