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 <div class="subTitle">org.apache.commons.math3.random</div>
 <h2 title="Class AbstractRandomGenerator" class="title">Class AbstractRandomGenerator</h2>
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 <dt>All Implemented Interfaces:</dt>
 <dd><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></dd>
 </dl>
 <hr>
 <br>
 <pre>public abstract class <span class="strong">AbstractRandomGenerator</span>
 extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
 implements <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></pre>
 <div class="block">Abstract class implementing the <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random"><code>RandomGenerator</code></a> interface.
  Default implementations for all methods other than <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextDouble()"><code>nextDouble()</code></a> and
  <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(long)"><code>setSeed(long)</code></a> are provided.
  <p>
  All data generation methods are based on <code>code nextDouble()</code>.
  Concrete implementations <strong>must</strong> override
  this method and <strong>should</strong> provide better / more
  performant implementations of the other methods if the underlying PRNG
  supplies them.</p></div>
 <dl><dt><span class="strong">Since:</span></dt>
   <dd>1.1</dd>
 <dt><span class="strong">Version:</span></dt>
   <dd>$Id: AbstractRandomGenerator.java 1538368 2013-11-03 13:57:37Z erans $</dd></dl>
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 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#AbstractRandomGenerator()">AbstractRandomGenerator</a></strong>()</code>
 <div class="block">Construct a RandomGenerator.</div>
 </td>
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 <caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#clear()">clear</a></strong>()</code>
 <div class="block">Clears the cache used by the default implementation of
  <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextGaussian()"><code>nextGaussian()</code></a>.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextBoolean()">nextBoolean</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, uniformly distributed
  <code>boolean</code> value from this random number generator's
  sequence.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextBytes(byte[])">nextBytes</a></strong>(byte[]&nbsp;bytes)</code>
 <div class="block">Generates random bytes and places them into a user-supplied
  byte array.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>abstract double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextDouble()">nextDouble</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, uniformly distributed
  <code>double</code> value between <code>0.0</code> and
  <code>1.0</code> from this random number generator's sequence.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>float</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextFloat()">nextFloat</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>float</code>
  value between <code>0.0</code> and <code>1.0</code> from this random
  number generator's sequence.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextGaussian()">nextGaussian</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, Gaussian ("normally") distributed
  <code>double</code> value with mean <code>0.0</code> and standard
  deviation <code>1.0</code> from this random number generator's sequence.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextInt()">nextInt</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>int</code>
  value from this random number generator's sequence.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextInt(int)">nextInt</a></strong>(int&nbsp;n)</code>
 <div class="block">Returns a pseudorandom, uniformly distributed <code>int</code> value
  between 0 (inclusive) and the specified value (exclusive), drawn from
  this random number generator's sequence.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextLong()">nextLong</a></strong>()</code>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>long</code>
  value from this random number generator's sequence.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(int)">setSeed</a></strong>(int&nbsp;seed)</code>
 <div class="block">Sets the seed of the underlying random number generator using an
  <code>int</code> seed.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(int[])">setSeed</a></strong>(int[]&nbsp;seed)</code>
 <div class="block">Sets the seed of the underlying random number generator using an
  <code>int</code> array seed.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>abstract void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(long)">setSeed</a></strong>(long&nbsp;seed)</code>
 <div class="block">Sets the seed of the underlying random number generator using a
  <code>long</code> seed.</div>
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 <h4>AbstractRandomGenerator</h4>
 <pre>public&nbsp;AbstractRandomGenerator()</pre>
 <div class="block">Construct a RandomGenerator.</div>
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 <pre>public&nbsp;void&nbsp;clear()</pre>
 <div class="block">Clears the cache used by the default implementation of
  <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextGaussian()"><code>nextGaussian()</code></a>. Implementations that do not override the
  default implementation of <code>nextGaussian</code> should call this
  method in the implementation of <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(long)"><code>setSeed(long)</code></a></div>
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 <pre>public&nbsp;void&nbsp;setSeed(int&nbsp;seed)</pre>
 <div class="block">Sets the seed of the underlying random number generator using an
  <code>int</code> seed.
  <p>Sequences of values generated starting with the same seeds
  should be identical.
  </p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int)">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the seed value</dd></dl>
 </li>
 </ul>
 <a name="setSeed(int[])">
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 <h4>setSeed</h4>
 <pre>public&nbsp;void&nbsp;setSeed(int[]&nbsp;seed)</pre>
 <div class="block">Sets the seed of the underlying random number generator using an
  <code>int</code> array seed.
  <p>Sequences of values generated starting with the same seeds
  should be identical.
  </p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int[])">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the seed value</dd></dl>
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 <pre>public abstract&nbsp;void&nbsp;setSeed(long&nbsp;seed)</pre>
 <div class="block">Sets the seed of the underlying random number generator using a
  <code>long</code> seed.  Sequences of values generated starting with the
  same seeds should be identical.
  <p>
  Implementations that do not override the default implementation of
  <code>nextGaussian</code> should include a call to <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#clear()"><code>clear()</code></a> in the
  implementation of this method.</p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(long)">setSeed</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the seed value</dd></dl>
 </li>
 </ul>
 <a name="nextBytes(byte[])">
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 <h4>nextBytes</h4>
 <pre>public&nbsp;void&nbsp;nextBytes(byte[]&nbsp;bytes)</pre>
 <div class="block">Generates random bytes and places them into a user-supplied
  byte array.  The number of random bytes produced is equal to
  the length of the byte array.
  <p>
  The default implementation fills the array with bytes extracted from
  random integers generated using <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#nextInt()"><code>nextInt()</code></a>.</p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextBytes(byte[])">nextBytes</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>bytes</code> - the non-null byte array in which to put the
  random bytes</dd></dl>
 </li>
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 <a name="nextInt()">
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 <h4>nextInt</h4>
 <pre>public&nbsp;int&nbsp;nextInt()</pre>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>int</code>
  value from this random number generator's sequence.
  All 2<font size="-1"><sup>32</sup></font> possible <code>int</code> values
  should be produced with  (approximately) equal probability.
  <p>
  The default implementation provided here returns
  <pre>
  <code>(int) (nextDouble() * Integer.MAX_VALUE)</code>
  </pre></p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextInt()">nextInt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, uniformly distributed <code>int</code>
   value from this random number generator's sequence</dd></dl>
 </li>
 </ul>
 <a name="nextInt(int)">
 <!--   -->
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 <h4>nextInt</h4>
 <pre>public&nbsp;int&nbsp;nextInt(int&nbsp;n)</pre>
 <div class="block">Returns a pseudorandom, uniformly distributed <code>int</code> value
  between 0 (inclusive) and the specified value (exclusive), drawn from
  this random number generator's sequence.
  <p>
  The default implementation returns
  <pre>
  <code>(int) (nextDouble() * n</code>
  </pre></p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextInt(int)">nextInt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>n</code> - the bound on the random number to be returned.  Must be
  positive.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>a pseudorandom, uniformly distributed <code>int</code>
  value between 0 (inclusive) and n (exclusive).</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>n &lt;= 0</code>.</dd></dl>
 </li>
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 <a name="nextLong()">
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 <h4>nextLong</h4>
 <pre>public&nbsp;long&nbsp;nextLong()</pre>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>long</code>
  value from this random number generator's sequence.  All
  2<font size="-1"><sup>64</sup></font> possible <code>long</code> values
  should be produced with (approximately) equal probability.
  <p>
  The default implementation returns
  <pre>
  <code>(long) (nextDouble() * Long.MAX_VALUE)</code>
  </pre></p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextLong()">nextLong</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, uniformly distributed <code>long</code>
 value from this random number generator's sequence</dd></dl>
 </li>
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 <a name="nextBoolean()">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>nextBoolean</h4>
 <pre>public&nbsp;boolean&nbsp;nextBoolean()</pre>
 <div class="block">Returns the next pseudorandom, uniformly distributed
  <code>boolean</code> value from this random number generator's
  sequence.
  <p>
  The default implementation returns
  <pre>
  <code>nextDouble() <= 0.5</code>
  </pre></p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextBoolean()">nextBoolean</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, uniformly distributed
  <code>boolean</code> value from this random number generator's
  sequence</dd></dl>
 </li>
 </ul>
 <a name="nextFloat()">
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 <h4>nextFloat</h4>
 <pre>public&nbsp;float&nbsp;nextFloat()</pre>
 <div class="block">Returns the next pseudorandom, uniformly distributed <code>float</code>
  value between <code>0.0</code> and <code>1.0</code> from this random
  number generator's sequence.
  <p>
  The default implementation returns
  <pre>
  <code>(float) nextDouble() </code>
  </pre></p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextFloat()">nextFloat</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, uniformly distributed <code>float</code>
  value between <code>0.0</code> and <code>1.0</code> from this
  random number generator's sequence</dd></dl>
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 <h4>nextDouble</h4>
 <pre>public abstract&nbsp;double&nbsp;nextDouble()</pre>
 <div class="block">Returns the next pseudorandom, uniformly distributed
  <code>double</code> value between <code>0.0</code> and
  <code>1.0</code> from this random number generator's sequence.
  <p>
  This method provides the underlying source of random data used by the
  other methods.</p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextDouble()">nextDouble</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, uniformly distributed
   <code>double</code> value between <code>0.0</code> and
   <code>1.0</code> from this random number generator's sequence</dd></dl>
 </li>
 </ul>
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 <h4>nextGaussian</h4>
 <pre>public&nbsp;double&nbsp;nextGaussian()</pre>
 <div class="block">Returns the next pseudorandom, Gaussian ("normally") distributed
  <code>double</code> value with mean <code>0.0</code> and standard
  deviation <code>1.0</code> from this random number generator's sequence.
  <p>
  The default implementation uses the <em>Polar Method</em>
  due to G.E.P. Box, M.E. Muller and G. Marsaglia, as described in
  D. Knuth, <u>The Art of Computer Programming</u>, 3.4.1C.</p>
  <p>
  The algorithm generates a pair of independent random values.  One of
  these is cached for reuse, so the full algorithm is not executed on each
  activation.  Implementations that do not override this method should
  make sure to call <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#clear()"><code>clear()</code></a> to clear the cached value in the
  implementation of <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html#setSeed(long)"><code>setSeed(long)</code></a>.</p></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html#nextGaussian()">nextGaussian</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a></code></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the next pseudorandom, Gaussian ("normally") distributed
  <code>double</code> value with mean <code>0.0</code> and
  standard deviation <code>1.0</code> from this random number
   generator's sequence</dd></dl>
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