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var methods = {"i0":9,"i1":9,"i2":9,"i3":41,"i4":9,"i5":9,"i6":9,"i7":9,"i8":9,"i9":9,"i10":9,"i11":9,"i12":9,"i13":9,"i14":9,"i15":9,"i16":9,"i17":9,"i18":9,"i19":9,"i20":9};
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<div class="subTitle">org.jpl7</div>
<h2 title="Class JPL" class="title">Class JPL</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.jpl7.JPL</li>
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<pre>public class <span class="typeNameLabel">JPL</span>
extends java.lang.Object</pre>
<div class="block">The jpl.JPL class contains static methods which allow (i) inspection and
alteration of the "default" initialisation arguments (ii) explicit
initialisation (iii) discovery of whether the Prolog engine is already
initialised, and if so, with what arguments. The Prolog engine must be
initialized before any queries are made, but this will happen automatically
(upon the first call to a Prolog FLI routine) if it has not already been done
explicitly.
<hr>
Copyright (C) 2004 Paul Singleton
<p>
Copyright (C) 1998 Fred Dushin
<p>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
<ol>
<li>Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
<li>Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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<h3>Field Summary</h3>
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<caption><span>Fields</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#DEBUG">DEBUG</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#JFALSE">JFALSE</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#JNULL">JNULL</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#JTRUE">JTRUE</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#JVOID">JVOID</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_NIL">LIST_NIL</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_NIL_MODERN">LIST_NIL_MODERN</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_NIL_TRADITIONAL">LIST_NIL_TRADITIONAL</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_PAIR">LIST_PAIR</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_PAIR_MODERN">LIST_PAIR_MODERN</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_PAIR_TRADITIONAL">LIST_PAIR_TRADITIONAL</a></span></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#LIST_TOSTRING_TEXTUAL">LIST_TOSTRING_TEXTUAL</a></span></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#modeDontTellMe">modeDontTellMe</a></span></code> </td>
</tr>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#JPL--">JPL</a></span>()</code> </td>
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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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>static java.lang.String[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#getActualInitArgs--">getActualInitArgs</a></span>()</code>
<div class="block">Returns, in an array of String, the sequence of command-line arguments
that were actually used when the Prolog engine was formerly initialised.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static java.lang.String[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#getDefaultInitArgs--">getDefaultInitArgs</a></span>()</code>
<div class="block">Returns, in an array of String, the sequence of command-line arguments
that would be used if the Prolog engine were to be initialised now.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#getSyntax--">getSyntax</a></span>()</code> </td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#halt--">halt</a></span>()</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#init--">init</a></span>()</code>
<div class="block">Initialises the Prolog engine using the current default initialisation
parameters, and returns 'true' (or 'false' if already initialised).</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#init-java.lang.String:A-">init</a></span>(java.lang.String[] args)</code>
<div class="block">Initializes the Prolog engine, using the String argument parameters
passed.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#isSimpleName-java.lang.String-">isSimpleName</a></span>(java.lang.String s)</code>
<div class="block">Checks if a string is a simple atom, with no quoting needed</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#jarPath--">jarPath</a></span>()</code> </td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#loadNativeLibrary--">loadNativeLibrary</a></span>()</code> </td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#main-java.lang.String:A-">main</a></span>(java.lang.String[] args)</code> </td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#newJRef-java.lang.Object-">newJRef</a></span>(java.lang.Object object)</code> </td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>protected static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#quotedName-java.lang.String-">quotedName</a></span>(java.lang.String name)</code>
<div class="block">Returns a quoted (iff necessary) form of the Atom's name, as understood
by Prolog read/1</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setDefaultInitArgs-java.lang.String:A-">setDefaultInitArgs</a></span>(java.lang.String[] args)</code>
<div class="block">Specifies, in an array of String, the sequence of command-line arguments
that should be used if the Prolog engine is subsequently initialised.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setDTMMode-boolean-">setDTMMode</a></span>(boolean dtm)</code>
<div class="block">Sets the global "dont-tell-me" mode (default value: true).</div>
</td>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setNativeLibraryDir-java.lang.String-">setNativeLibraryDir</a></span>(java.lang.String newDir)</code> </td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setNativeLibraryName-java.lang.String-">setNativeLibraryName</a></span>(java.lang.String newName)</code> </td>
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<tr id="i16" class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setNativeLibraryPath-java.lang.String-">setNativeLibraryPath</a></span>(java.lang.String newPath)</code> </td>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setTraditional--">setTraditional</a></span>()</code> </td>
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<tr id="i18" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#setTraditionalAnyway--">setTraditionalAnyway</a></span>()</code> </td>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#version_string--">version_string</a></span>()</code>
<div class="block">Returns a String (eg "3.0.0-alpha") identifying this version of JPL.</div>
</td>
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<tr id="i20" class="altColor">
<td class="colFirst"><code>static org.jpl7.Version</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../org/jpl7/JPL.html#version--">version</a></span>()</code>
<div class="block">Returns (as a Version) an identification of this version of JPL.</div>
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<pre>protected static final boolean DEBUG</pre>
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<pre>public static final <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a> JFALSE</pre>
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<pre>public static final <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a> JTRUE</pre>
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<pre>public static final <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a> JNULL</pre>
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<pre>public static final <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a> JVOID</pre>
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<pre>protected static final <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a> LIST_NIL_MODERN</pre>
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<pre>protected static final <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a> LIST_NIL_TRADITIONAL</pre>
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<pre>public static <a href="../../org/jpl7/Atom.html" title="class in org.jpl7">Atom</a> LIST_NIL</pre>
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<pre>protected static final java.lang.String LIST_PAIR_MODERN</pre>
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<dd><a href="../../constant-values.html#org.jpl7.JPL.LIST_PAIR_MODERN">Constant Field Values</a></dd>
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<pre>protected static final java.lang.String LIST_PAIR_TRADITIONAL</pre>
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<dd><a href="../../constant-values.html#org.jpl7.JPL.LIST_PAIR_TRADITIONAL">Constant Field Values</a></dd>
</dl>
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<pre>public static java.lang.String LIST_PAIR</pre>
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<pre>public static boolean LIST_TOSTRING_TEXTUAL</pre>
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<pre>public JPL()</pre>
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<pre>public static java.lang.String setNativeLibraryName(java.lang.String newName)</pre>
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<pre>public static java.lang.String setNativeLibraryDir(java.lang.String newDir)</pre>
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<pre>public static java.lang.String setNativeLibraryPath(java.lang.String newPath)</pre>
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<pre>public static void loadNativeLibrary()</pre>
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<pre>public static java.lang.String jarPath()</pre>
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<h4>setDTMMode</h4>
<pre>public static void setDTMMode(boolean dtm)</pre>
<div class="block">Sets the global "dont-tell-me" mode (default value: true). When 'true',
bindings will *not* be returned for any variable (in a Query's goal)
whose name begins with an underscore character (except for "anonymous"
variables, i.e. those whose name comprises just the underscore character,
whose bindings are never returned). When 'false', bindings are returned
for *all* variables except anonymous ones; this mode may be useful when
traditional top-level interpreter behaviour is wanted, e.g. in a
Java-based Prolog IDE or debugger.
<p>
This method should be regarded as experimental, and may subsequently be
deprecated in favour of some more general mechanism for setting options,
perhaps per-Query and per-call as well as globally.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>dtm</code> - new "dont-tell-me" mode value</dd>
</dl>
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<pre>public static void setTraditional()</pre>
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<pre>public static void setTraditionalAnyway()</pre>
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<pre>public static java.lang.String getSyntax()</pre>
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<h4>getDefaultInitArgs</h4>
<pre>public static java.lang.String[] getDefaultInitArgs()</pre>
<div class="block">Returns, in an array of String, the sequence of command-line arguments
that would be used if the Prolog engine were to be initialised now.
Returns null if the Prolog VM has already been initialised (in which case
the default init args are irrelevant and the actual init args are of
interest)
<p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>current default initialisation arguments, or null if already
initialised</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../org/jpl7/JPL.html#getActualInitArgs--"><code>getActualInitArgs()</code></a></dd>
</dl>
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<pre>public static void setDefaultInitArgs(java.lang.String[] args)</pre>
<div class="block">Specifies, in an array of String, the sequence of command-line arguments
that should be used if the Prolog engine is subsequently initialised.
<p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - new default initialization arguments</dd>
</dl>
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<pre>public static java.lang.String[] getActualInitArgs()</pre>
<div class="block">Returns, in an array of String, the sequence of command-line arguments
that were actually used when the Prolog engine was formerly initialised.
This method returns null if the Prolog engine has not yet been
initialised, and thus may be used to test this condition.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>actual initialization arguments</dd>
</dl>
</li>
</ul>
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<h4>init</h4>
<pre>public static boolean init(java.lang.String[] args)</pre>
<div class="block">Initializes the Prolog engine, using the String argument parameters
passed. This method need be called only if you want to both (i)
initialise the Prolog engine with parameters other than the default ones
and (ii) force initialisation to occur (rather than allow it to occur
automatically at the first query). For parameter options, consult your
local Prolog documentation. The parameter values are passed directly to
initialization routines for the Prolog environment.
<p>
This method must be called before making any queries.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - Initialization parameter list</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true iff initialization was new; false if already initialized</dd>
</dl>
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<h4>init</h4>
<pre>public static boolean init()</pre>
<div class="block">Initialises the Prolog engine using the current default initialisation
parameters, and returns 'true' (or 'false' if already initialised).</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if initialization was new, false if already initialized</dd>
</dl>
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<h4>isSimpleName</h4>
<pre>protected static boolean isSimpleName(java.lang.String s)</pre>
<div class="block">Checks if a string is a simple atom, with no quoting needed</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>s</code> - string to check if it is simple name (no quoting needed)</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>whether s is a simple name, i.e. which needs no quoting in source text</dd>
</dl>
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<pre>public static <a href="../../org/jpl7/Term.html" title="class in org.jpl7">Term</a> newJRef(java.lang.Object object)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>object</code> - the object of interest to get the JREF</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a new Term instance which canonically represents the given object
reference (concrete or null)</dd>
</dl>
</li>
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<h4>quotedName</h4>
<pre>protected static java.lang.String quotedName(java.lang.String name)</pre>
<div class="block">Returns a quoted (iff necessary) form of the Atom's name, as understood
by Prolog read/1</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - the name to quote if needed</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a quoted form of the Atom's name, as understood by Prolog read/1</dd>
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<h4>halt</h4>
<pre>@Deprecated
public static void halt()</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span> </div>
<div class="block">Terminates the Prolog session.
<p>
<b>Note.</b> This method calls the FLI halt() method with a status of 0,
but the halt method currently is a no-op in SWI.</div>
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<h4>version</h4>
<pre>public static org.jpl7.Version version()</pre>
<div class="block">Returns (as a Version) an identification of this version of JPL.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the running version of JPL.</dd>
</dl>
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<pre>public static java.lang.String version_string()</pre>
<div class="block">Returns a String (eg "3.0.0-alpha") identifying this version of JPL.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a String (eg "3.0.0-alpha") identifying this version of JPL.</dd>
</dl>
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<pre>public static void main(java.lang.String[] args)</pre>
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