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<div class="subTitle">org.apache.commons.io</div>
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<h2 title="Class EndianUtils" class="title">Class EndianUtils</h2>
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<li>org.apache.commons.io.EndianUtils</li>
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<pre>public class <span class="typeNameLabel">EndianUtils</span>
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extends <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
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<div class="block">Utility code for dealing with different endian systems.
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<p>
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Different computer architectures adopt different conventions for
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byte ordering. In so-called "Little Endian" architectures (eg Intel),
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the low-order byte is stored in memory at the lowest address, and
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subsequent bytes at higher addresses. For "Big Endian" architectures
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(eg Motorola), the situation is reversed.
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This class helps you solve this incompatibility.
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<p>
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Origin of code: Excalibur</div>
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<dl>
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<dt><span class="seeLabel">See Also:</span></dt>
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<dd><a href="../../../../org/apache/commons/io/input/SwappedDataInputStream.html" title="class in org.apache.commons.io.input"><code>SwappedDataInputStream</code></a></dd>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#EndianUtils--">EndianUtils</a></span>()</code>
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<div class="block">Instances should NOT be constructed in standard programming.</div>
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<h3>Method Summary</h3>
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<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>static double</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedDouble-byte:A-int-">readSwappedDouble</a></span>(byte[] data,
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int offset)</code>
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<div class="block">Reads a "double" value from a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>static double</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedDouble-java.io.InputStream-">readSwappedDouble</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a "double" value from an InputStream.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>static float</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedFloat-byte:A-int-">readSwappedFloat</a></span>(byte[] data,
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int offset)</code>
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<div class="block">Reads a "float" value from a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>static float</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedFloat-java.io.InputStream-">readSwappedFloat</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a "float" value from an InputStream.</div>
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</td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedInteger-byte:A-int-">readSwappedInteger</a></span>(byte[] data,
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int offset)</code>
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<div class="block">Reads a "int" value from a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedInteger-java.io.InputStream-">readSwappedInteger</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a "int" value from an InputStream.</div>
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</td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>static long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedLong-byte:A-int-">readSwappedLong</a></span>(byte[] data,
|
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int offset)</code>
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<div class="block">Reads a "long" value from a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>static long</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedLong-java.io.InputStream-">readSwappedLong</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a "long" value from an InputStream.</div>
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</td>
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</tr>
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<tr id="i8" class="altColor">
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<td class="colFirst"><code>static short</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedShort-byte:A-int-">readSwappedShort</a></span>(byte[] data,
|
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int offset)</code>
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<div class="block">Reads a "short" value from a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i9" class="rowColor">
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<td class="colFirst"><code>static short</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedShort-java.io.InputStream-">readSwappedShort</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a "short" value from an InputStream.</div>
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</td>
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</tr>
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<tr id="i10" class="altColor">
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<td class="colFirst"><code>static long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedUnsignedInteger-byte:A-int-">readSwappedUnsignedInteger</a></span>(byte[] data,
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int offset)</code>
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<div class="block">Reads an unsigned integer (32-bit) value from a byte array at a given
|
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offset.</div>
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</td>
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</tr>
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<tr id="i11" class="rowColor">
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<td class="colFirst"><code>static long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedUnsignedInteger-java.io.InputStream-">readSwappedUnsignedInteger</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a unsigned integer (32-bit) from an InputStream.</div>
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</td>
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</tr>
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<tr id="i12" class="altColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedUnsignedShort-byte:A-int-">readSwappedUnsignedShort</a></span>(byte[] data,
|
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int offset)</code>
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<div class="block">Reads an unsigned short (16-bit) value from a byte array at a given
|
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offset.</div>
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</td>
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</tr>
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<tr id="i13" class="rowColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#readSwappedUnsignedShort-java.io.InputStream-">readSwappedUnsignedShort</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)</code>
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<div class="block">Reads a unsigned short (16-bit) from an InputStream.</div>
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</td>
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</tr>
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<tr id="i14" class="altColor">
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<td class="colFirst"><code>static double</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#swapDouble-double-">swapDouble</a></span>(double value)</code>
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<div class="block">Converts a "double" value between endian systems.</div>
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</td>
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</tr>
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<tr id="i15" class="rowColor">
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<td class="colFirst"><code>static float</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#swapFloat-float-">swapFloat</a></span>(float value)</code>
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<div class="block">Converts a "float" value between endian systems.</div>
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</td>
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</tr>
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<tr id="i16" class="altColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#swapInteger-int-">swapInteger</a></span>(int value)</code>
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<div class="block">Converts a "int" value between endian systems.</div>
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</td>
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</tr>
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<tr id="i17" class="rowColor">
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<td class="colFirst"><code>static long</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#swapLong-long-">swapLong</a></span>(long value)</code>
|
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<div class="block">Converts a "long" value between endian systems.</div>
|
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</td>
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</tr>
|
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<tr id="i18" class="altColor">
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<td class="colFirst"><code>static short</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#swapShort-short-">swapShort</a></span>(short value)</code>
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<div class="block">Converts a "short" value between endian systems.</div>
|
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</td>
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</tr>
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<tr id="i19" class="rowColor">
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<td class="colFirst"><code>static void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedDouble-byte:A-int-double-">writeSwappedDouble</a></span>(byte[] data,
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int offset,
|
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double value)</code>
|
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<div class="block">Writes a "double" value to a byte array at a given offset.</div>
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</td>
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</tr>
|
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<tr id="i20" class="altColor">
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<td class="colFirst"><code>static void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedDouble-java.io.OutputStream-double-">writeSwappedDouble</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> output,
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double value)</code>
|
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<div class="block">Writes a "double" value to an OutputStream.</div>
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</td>
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</tr>
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<tr id="i21" class="rowColor">
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<td class="colFirst"><code>static void</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedFloat-byte:A-int-float-">writeSwappedFloat</a></span>(byte[] data,
|
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int offset,
|
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float value)</code>
|
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<div class="block">Writes a "float" value to a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i22" class="altColor">
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<td class="colFirst"><code>static void</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedFloat-java.io.OutputStream-float-">writeSwappedFloat</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> output,
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float value)</code>
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<div class="block">Writes a "float" value to an OutputStream.</div>
|
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</td>
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</tr>
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<tr id="i23" class="rowColor">
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<td class="colFirst"><code>static void</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedInteger-byte:A-int-int-">writeSwappedInteger</a></span>(byte[] data,
|
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int offset,
|
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int value)</code>
|
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<div class="block">Writes a "int" value to a byte array at a given offset.</div>
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</td>
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</tr>
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<tr id="i24" class="altColor">
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<td class="colFirst"><code>static void</code></td>
|
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedInteger-java.io.OutputStream-int-">writeSwappedInteger</a></span>(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> output,
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int value)</code>
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<div class="block">Writes a "int" value to an OutputStream.</div>
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</td>
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</tr>
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<tr id="i25" class="rowColor">
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<td class="colFirst"><code>static void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedLong-byte:A-int-long-">writeSwappedLong</a></span>(byte[] data,
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int offset,
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long value)</code>
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<div class="block">Writes a "long" value to a byte array at a given offset.</div>
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<td class="colFirst"><code>static void</code></td>
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long value)</code>
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<td class="colFirst"><code>static void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/io/EndianUtils.html#writeSwappedShort-byte:A-int-short-">writeSwappedShort</a></span>(byte[] data,
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int offset,
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short value)</code>
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<td class="colFirst"><code>static void</code></td>
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short value)</code>
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<code><a href="https://docs.oracle.com/javase/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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/7/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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<pre>public static short swapShort(short value)</pre>
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<div class="block">Converts a "short" value between endian systems.</div>
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<dd><code>value</code> - value to convert</dd>
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<dd><code>value</code> - value to convert</dd>
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<dd><code>value</code> - value to convert</dd>
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<dd>the converted value</dd>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>value</code> - value to convert</dd>
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<dd>the converted value</dd>
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<pre>public static void writeSwappedShort(byte[] data,
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<div class="block">Writes a "short" value to a byte array at a given offset. The value is
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<dd><code>data</code> - target byte array</dd>
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<div class="block">Reads a "short" value from a byte array at a given offset. The value is
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>data</code> - source byte array</dd>
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<dd><code>offset</code> - starting offset in the byte array</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the value read</dd>
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<pre>public static int readSwappedUnsignedShort(byte[] data,
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<div class="block">Reads an unsigned short (16-bit) value from a byte array at a given
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<dd><code>data</code> - source byte array</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the value read</dd>
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<pre>public static void writeSwappedInteger(byte[] data,
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int value)</pre>
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<div class="block">Writes a "int" value to a byte array at a given offset. The value is
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converted to the opposed endian system while writing.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>data</code> - target byte array</dd>
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<dd><code>offset</code> - starting offset in the byte array</dd>
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<dd><code>value</code> - value to write</dd>
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<div class="block">Reads a "int" value from a byte array at a given offset. The value is
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>data</code> - source byte array</dd>
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<dd><code>offset</code> - starting offset in the byte array</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the value read</dd>
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<pre>public static long readSwappedUnsignedInteger(byte[] data,
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<div class="block">Reads an unsigned integer (32-bit) value from a byte array at a given
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<dd><code>data</code> - source byte array</dd>
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<dd>the value read</dd>
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long value)</pre>
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<div class="block">Writes a "long" value to a byte array at a given offset. The value is
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<dd><code>data</code> - source byte array</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<div class="block">Writes a "int" value to an OutputStream. The value is converted to the opposed endian system while writing.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>output</code> - target OutputStream</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<pre>public static long readSwappedUnsignedInteger(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>input</code> - source InputStream</dd>
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<dd>the value just read</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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long value)
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<div class="block">Writes a "long" value to an OutputStream. The value is
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>output</code> - target OutputStream</dd>
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<dd><code>value</code> - value to write</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<pre>public static long readSwappedLong(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)
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throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dd>the value just read</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>output</code> - target OutputStream</dd>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dd>the value just read</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<pre>public static void writeSwappedDouble(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> output,
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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<pre>public static double readSwappedDouble(<a href="https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> input)
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throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dd><code>input</code> - source InputStream</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>the value just read</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - in case of an I/O problem</dd>
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