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596 lines
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<div class="subTitle">edu.rit.util</div>
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<h2 title="Class Instance" class="title">Class Instance</h2>
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<ul class="inheritance">
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<li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<pre>public class <span class="strong">Instance</span>
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extends <a href="http://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">Class Instance provides static methods for creating instances of classes.</div>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
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<tr>
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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 class="altColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</a><?></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#getDefaultConstructor(java.lang.Class)">getDefaultConstructor</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> c)</code>
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<div class="block">Get the given class's default constructor.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</a><?></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#getDefaultConstructor(java.lang.Class, boolean)">getDefaultConstructor</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> c,
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boolean disableAccessChecks)</code>
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<div class="block">Get the given class's default constructor.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static <T> T</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.Class)">newDefaultInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> c)</code>
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<div class="block">Create a new instance of the given class using the class's default
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constructor.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <T> T</code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.Class, boolean)">newDefaultInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> c,
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boolean disableAccessChecks)</code>
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<div class="block">Create a new instance of the given class using the class's default
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constructor.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.String)">newDefaultInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> className)</code>
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<div class="block">Create a new instance of the class with the given name using the class's
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default constructor.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.String, boolean)">newDefaultInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> className,
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boolean disableAccessChecks)</code>
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<div class="block">Create a new instance of the class with the given name using the class's
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default constructor.</div>
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</td>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newInstance(java.lang.String)">newInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> s)</code>
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<div class="block">Create a new instance of a class as specified by the given string.</div>
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</td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
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<td class="colLast"><code><strong><a href="../../../edu/rit/util/Instance.html#newInstance(java.lang.String, boolean)">newInstance</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> s,
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boolean disableAccessChecks)</code>
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<div class="block">Create a new instance of a class as specified by the given string.</div>
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</td>
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<h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
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<code><a href="http://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="http://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="http://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="http://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="http://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="http://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="http://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="http://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="http://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="http://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="http://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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<h3>Method Detail</h3>
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<a name="newInstance(java.lang.String)">
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<h4>newInstance</h4>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> newInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> s)
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throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
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<div class="block">Create a new instance of a class as specified by the given string.
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Calling this method is equivalent to calling
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<TT>newInstance(s,false)</TT>. See the <a href="../../../edu/rit/util/Instance.html#newInstance(java.lang.String, boolean)"><code>newInstance(String,boolean)</code></a> method for
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further information.</div>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>s</code> - Constructor expression string.</dd>
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<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
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<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>s</TT> does not obey the required
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syntax.</dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code> - Thrown if the given class cannot be found.</dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if a suitable constructor cannot be found in the given class.</dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
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interface or an abstract class.</dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
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does not have access to the given constructor.</dd>
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<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the given constructor throws an exception.</dd></dl>
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<a name="newInstance(java.lang.String, boolean)">
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<h4>newInstance</h4>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> newInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> s,
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boolean disableAccessChecks)
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throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
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<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
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<div class="block">Create a new instance of a class as specified by the given string. The
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string must consist of a fully-qualified class name, a left parenthesis,
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zero or more comma-separated arguments, and a right parenthesis. No
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whitespace is allowed.
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<P>
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The <TT>newInstance()</TT> method deduces the data type and value of each
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argument provided in the constructor expression according to the
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following patterns:
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<UL>
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0b</TT> or <TT>0B</TT>; one or
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more digits <TT>0</TT> through <TT>1</TT> — binary (base-2) value
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of type <TT>int</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0x</TT> or <TT>0X</TT>; one or
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more digits <TT>0</TT> through <TT>9</TT>, <TT>a</TT> through <TT>f</TT>,
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or <TT>A</TT> through <TT>F</TT> — hexadecimal (base-16) value of
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type <TT>int</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0</TT>; zero or more digits
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<TT>0</TT> through <TT>7</TT> — octal (base-8) value of type
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<TT>int</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; a digit <TT>1</TT> through <TT>9</TT>;
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zero or more digits <TT>0</TT> through <TT>9</TT> — decimal value
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of type <TT>int</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0b</TT> or <TT>0B</TT>; one or
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more digits <TT>0</TT> through <TT>1</TT>; <TT>l</TT> or <TT>L</TT>
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— binary (base-2) value of type <TT>long</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0x</TT> or <TT>0X</TT>; one or
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more digits <TT>0</TT> through <TT>9</TT>, <TT>a</TT> through <TT>f</TT>,
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or <TT>A</TT> through <TT>F</TT>; <TT>l</TT> or <TT>L</TT> —
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hexadecimal (base-16) value of type <TT>long</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; <TT>0</TT>; zero or more digits
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<TT>0</TT> through <TT>7</TT>; <TT>l</TT> or <TT>L</TT> — octal
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(base-8) value of type <TT>long</TT>.
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<P><LI>
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Optional <TT>+</TT> or <TT>-</TT>; a digit <TT>1</TT> through <TT>9</TT>;
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zero or more digits <TT>0</TT> through <TT>9</TT>; <TT>l</TT> or
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<TT>L</TT> — decimal value of type <TT>long</TT>.
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<P><LI>
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Otherwise — type String.
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</UL>
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<P>
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If a decimal argument is outside the range of type <TT>int</TT> or type
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<TT>long</TT>, the deduced value is not specified. If a binary, octal, or
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hexadecimal argument is larger than 32 bits for type <TT>int</TT> or 64
|
|
bits for type <TT>long</TT>, the deduced value is not specified.
|
|
<P>
|
|
The <TT>newInstance()</TT> method attempts to find a constructor for the
|
|
given class as follows, where <I>N</I> is the number of provided
|
|
arguments:
|
|
<UL>
|
|
<P><LI>
|
|
If <I>N</I> = 0, use a no-argument constructor.
|
|
<P><LI>
|
|
Else if there is a constructor with <I>N</I> arguments whose types match
|
|
those provided, use that constructor.
|
|
<P><LI>
|
|
Else if all provided arguments are of type <TT>int</TT> and there is a
|
|
constructor with one argument of type <TT>int[]</TT>, use that
|
|
constructor.
|
|
<P><LI>
|
|
Else if all provided arguments are of type <TT>long</TT> and there is a
|
|
constructor with one argument of type <TT>long[]</TT>, use that
|
|
constructor.
|
|
<P><LI>
|
|
Else if there is a constructor with <I>N</I> arguments of type
|
|
<TT>String</TT>, use that constructor; all provided arguments are passed
|
|
as strings.
|
|
<P><LI>
|
|
Else if there is a constructor with one argument of type
|
|
<TT>String[]</TT>, use that constructor; all provided arguments are
|
|
passed as strings.
|
|
<P><LI>
|
|
Else throw a NoSuchMethodException.
|
|
</UL>
|
|
<P>
|
|
The <TT>newInstance()</TT> method invokes the chosen constructor, passing
|
|
in the provided argument values, and returns a reference to the
|
|
newly-created instance.
|
|
<P>
|
|
If the <TT>disableAccessChecks</TT> argument is true, access checks are
|
|
suppressed when constructing the instance. This means the object's class
|
|
and/or the class's pertinent constructor need not be public, and a new
|
|
instance will still be constructed. However, this also requires that
|
|
either (a) a security manager is not installed, or (b) the security
|
|
manager allows ReflectPermission("suppressAccessChecks"). See the
|
|
<TT>java.lang.reflect.Constructor.setAccessible()</TT> method for further
|
|
information.
|
|
<P>
|
|
<I>Note:</I> To find the given class, the calling thread's context class
|
|
loader is used.</div>
|
|
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>s</code> - Constructor expression string.</dd><dd><code>disableAccessChecks</code> - True to disable access checks, false to
|
|
perform access checks.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - (unchecked exception) Thrown if <TT>s</TT> does not obey the required
|
|
syntax.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code> - Thrown if the given class cannot be found.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if a suitable constructor cannot be found in the given class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
|
|
interface or an abstract class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
|
|
does not have access to the class or constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the constructor throws an exception.</dd></dl>
|
|
</li>
|
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</ul>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> newDefaultInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> className)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
|
|
<div class="block">Create a new instance of the class with the given name using the class's
|
|
default constructor. Calling this method is equivalent to calling
|
|
<TT>newDefaultInstance(className,false)</TT>. See the <a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.String, boolean)"><code>newDefaultInstance(String,boolean)</code></a>
|
|
method for further information.
|
|
<P>
|
|
<I>Note:</I> To find the class with the given name, the calling thread's
|
|
context class loader is used.</div>
|
|
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>className</code> - Class name.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code> - Thrown if the class with the given name cannot be found.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the given class does not have a default constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
|
|
interface or an abstract class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
|
|
does not have access to the class or constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the constructor throws an exception.</dd></dl>
|
|
</li>
|
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<h4>newDefaultInstance</h4>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> newDefaultInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> className,
|
|
boolean disableAccessChecks)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
|
|
<div class="block">Create a new instance of the class with the given name using the class's
|
|
default constructor.
|
|
<P>
|
|
If the <TT>disableAccessChecks</TT> argument is true, access checks are
|
|
suppressed when constructing the new instance. This means the object's
|
|
class and/or the class's default constructor need not be public, and a
|
|
new instance will still be constructed. However, this also requires that
|
|
either (a) a security manager is not installed, or (b) the security
|
|
manager allows ReflectPermission("suppressAccessChecks"). See the
|
|
<TT>java.lang.reflect.Constructor.setAccessible()</TT> method for further
|
|
information.
|
|
<P>
|
|
<I>Note:</I> To find the class with the given name, the calling thread's
|
|
context class loader is used.</div>
|
|
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>className</code> - Class name.</dd><dd><code>disableAccessChecks</code> - True to disable access checks, false to perform access checks.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html?is-external=true" title="class or interface in java.lang">ClassNotFoundException</a></code> - Thrown if the class with the given name cannot be found.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the given class does not have a default constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
|
|
interface or an abstract class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
|
|
does not have access to the class or constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the constructor throws an exception.</dd></dl>
|
|
</li>
|
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</ul>
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<h4>newDefaultInstance</h4>
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<pre>public static <T> T newDefaultInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> c)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
|
|
<div class="block">Create a new instance of the given class using the class's default
|
|
constructor. Calling this method is equivalent to calling
|
|
<TT>newDefaultInstance(c,false)</TT>. See the <a href="../../../edu/rit/util/Instance.html#newDefaultInstance(java.lang.Class, boolean)"><code>newDefaultInstance(Class,boolean)</code></a>
|
|
method for further information.</div>
|
|
<dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - Class's data type.</dd><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - Class.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the given class does not have a default constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
|
|
interface or an abstract class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
|
|
does not have access to the class or constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the constructor throws an exception.</dd></dl>
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<pre>public static <T> T newDefaultInstance(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><T> c,
|
|
boolean disableAccessChecks)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a>,
|
|
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></pre>
|
|
<div class="block">Create a new instance of the given class using the class's default
|
|
constructor.
|
|
<P>
|
|
If the <TT>disableAccessChecks</TT> argument is true, access checks are
|
|
suppressed when constructing the new instance. This means the object's
|
|
class and/or the class's default constructor need not be public, and a
|
|
new instance will still be constructed. However, this also requires that
|
|
either (a) a security manager is not installed, or (b) the security
|
|
manager allows ReflectPermission("suppressAccessChecks"). See the
|
|
<TT>java.lang.reflect.Constructor.setAccessible()</TT> method for further
|
|
information.</div>
|
|
<dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>T</code> - Class's data type.</dd><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - Class.</dd><dd><code>disableAccessChecks</code> - True to disable access checks, false to perform access checks.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>New instance.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the given class does not have a default constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/InstantiationException.html?is-external=true" title="class or interface in java.lang">InstantiationException</a></code> - Thrown if an instance cannot be created because the given class is an
|
|
interface or an abstract class.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalAccessException.html?is-external=true" title="class or interface in java.lang">IllegalAccessException</a></code> - Thrown if an instance cannot be created because the calling method
|
|
does not have access to the class or constructor.</dd>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/InvocationTargetException.html?is-external=true" title="class or interface in java.lang.reflect">InvocationTargetException</a></code> - Thrown if the constructor throws an exception.</dd></dl>
|
|
</li>
|
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</ul>
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<a name="getDefaultConstructor(java.lang.Class)">
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<h4>getDefaultConstructor</h4>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</a><?> getDefaultConstructor(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> c)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></pre>
|
|
<div class="block">Get the given class's default constructor. Calling this method is
|
|
equivalent to calling <TT>getDefaultConstructor(c,false)</TT>. See the
|
|
<a href="../../../edu/rit/util/Instance.html#getDefaultConstructor(java.lang.Class, boolean)"><code>getDefaultConstructor(Class,boolean)</code></a> method for further information.</div>
|
|
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - Class.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>Default (no-argument) constructor for the class.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the class does not have a default constructor.</dd></dl>
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</li>
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</ul>
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<pre>public static <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="class or interface in java.lang.reflect">Constructor</a><?> getDefaultConstructor(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> c,
|
|
boolean disableAccessChecks)
|
|
throws <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></pre>
|
|
<div class="block">Get the given class's default constructor.
|
|
<P>
|
|
If the <TT>disableAccessChecks</TT> argument is true, access checks are
|
|
suppressed when constructing an instance using the returned constructor.
|
|
This means the object's class and/or the class's default constructor need
|
|
not be public, and a new instance will still be constructed. However,
|
|
this also requires that either (a) a security manager is not installed,
|
|
or (b) the security manager allows
|
|
ReflectPermission("suppressAccessChecks"). See the
|
|
<TT>java.lang.reflect.Constructor.setAccessible()</TT> method for further
|
|
information.</div>
|
|
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - Class.</dd><dd><code>disableAccessChecks</code> - True to disable access checks, false to
|
|
perform access checks.</dd>
|
|
<dt><span class="strong">Returns:</span></dt><dd>Default (no-argument) constructor for the class.</dd>
|
|
<dt><span class="strong">Throws:</span></dt>
|
|
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchMethodException.html?is-external=true" title="class or interface in java.lang">NoSuchMethodException</a></code> - Thrown if the class does not have a default constructor.</dd></dl>
|
|
</li>
|
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</ul>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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</div>
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<!-- ========= END OF CLASS DATA ========= -->
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