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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<h2 title="Class FieldUtils" class="title">Class FieldUtils</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="strong">FieldUtils</span>
extends java.lang.Object</pre>
<div class="block">Utilities for working with fields by reflection. Adapted and refactored from
the dormant [reflect] Commons sandbox component.
<p>
The ability is provided to break the scoping restrictions coded by the
programmer. This can allow fields to be changed that shouldn't be. This
facility should be used with care.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>2.5</dd>
<dt><span class="strong">Version:</span></dt>
<dd>$Id: FieldUtils.java 1057009 2011-01-09 19:48:06Z niallp $</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Apache Software Foundation, Matt Benson</dd></dl>
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<td class="colOne"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#FieldUtils()">FieldUtils</a></strong>()</code>
<div class="block">FieldUtils instances should NOT be constructed in standard programming.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static java.lang.reflect.Field</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#getField(java.lang.Class, java.lang.String)">getField</a></strong>(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName)</code>
<div class="block">Gets an accessible <code>Field</code> by name respecting scope.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>static java.lang.reflect.Field</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#getField(java.lang.Class, java.lang.String, boolean)">getField</a></strong>(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
boolean&nbsp;forceAccess)</code>
<div class="block">Gets an accessible <code>Field</code> by name breaking scope if
requested.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readField(java.lang.reflect.Field, java.lang.Object)">readField</a></strong>(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;target)</code>
<div class="block">Read an accessible Field.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readField(java.lang.reflect.Field, java.lang.Object, boolean)">readField</a></strong>(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;target,
boolean&nbsp;forceAccess)</code>
<div class="block">Read a Field.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readField(java.lang.Object, java.lang.String)">readField</a></strong>(java.lang.Object&nbsp;target,
java.lang.String&nbsp;fieldName)</code>
<div class="block">Read the named public field.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readField(java.lang.Object, java.lang.String, boolean)">readField</a></strong>(java.lang.Object&nbsp;target,
java.lang.String&nbsp;fieldName,
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<div class="block">Read the named field.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readStaticField(java.lang.Class, java.lang.String)">readStaticField</a></strong>(java.lang.Class&nbsp;cls,
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<div class="block">Read the named public static field.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readStaticField(java.lang.Class, java.lang.String, boolean)">readStaticField</a></strong>(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
boolean&nbsp;forceAccess)</code>
<div class="block">Read the named static field.</div>
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<tr class="altColor">
<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readStaticField(java.lang.reflect.Field)">readStaticField</a></strong>(java.lang.reflect.Field&nbsp;field)</code>
<div class="block">Read an accessible static Field.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#readStaticField(java.lang.reflect.Field, boolean)">readStaticField</a></strong>(java.lang.reflect.Field&nbsp;field,
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<div class="block">Read a static Field.</div>
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<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeField(java.lang.reflect.Field, java.lang.Object, java.lang.Object)">writeField</a></strong>(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;target,
java.lang.Object&nbsp;value)</code>
<div class="block">Write an accessible field.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeField(java.lang.reflect.Field, java.lang.Object, java.lang.Object, boolean)">writeField</a></strong>(java.lang.reflect.Field&nbsp;field,
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java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)</code>
<div class="block">Write a field.</div>
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<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeField(java.lang.Object, java.lang.String, java.lang.Object)">writeField</a></strong>(java.lang.Object&nbsp;target,
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<div class="block">Write a public field.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeField(java.lang.Object, java.lang.String, java.lang.Object, boolean)">writeField</a></strong>(java.lang.Object&nbsp;target,
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java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)</code>
<div class="block">Write a field.</div>
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<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeStaticField(java.lang.Class, java.lang.String, java.lang.Object)">writeStaticField</a></strong>(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value)</code>
<div class="block">Write a named public static Field.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeStaticField(java.lang.Class, java.lang.String, java.lang.Object, boolean)">writeStaticField</a></strong>(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)</code>
<div class="block">Write a named static Field.</div>
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<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeStaticField(java.lang.reflect.Field, java.lang.Object)">writeStaticField</a></strong>(java.lang.reflect.Field&nbsp;field,
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<div class="block">Write a public static Field.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../com/comphenix/protocol/reflect/FieldUtils.html#writeStaticField(java.lang.reflect.Field, java.lang.Object, boolean)">writeStaticField</a></strong>(java.lang.reflect.Field&nbsp;field,
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
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<h4>FieldUtils</h4>
<pre>public&nbsp;FieldUtils()</pre>
<div class="block">FieldUtils instances should NOT be constructed in standard programming.
<p>
This constructor is public to permit tools that require a JavaBean
instance to operate.</div>
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<h4>getField</h4>
<pre>public static&nbsp;java.lang.reflect.Field&nbsp;getField(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName)</pre>
<div class="block">Gets an accessible <code>Field</code> by name respecting scope.
Superclasses/interfaces will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - the class to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd>
<dt><span class="strong">Returns:</span></dt><dd>the Field object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd></dl>
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<pre>public static&nbsp;java.lang.reflect.Field&nbsp;getField(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
boolean&nbsp;forceAccess)</pre>
<div class="block">Gets an accessible <code>Field</code> by name breaking scope if
requested. Superclasses/interfaces will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - the class to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the Field object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readStaticField(java.lang.reflect.Field&nbsp;field)
throws java.lang.IllegalAccessException</pre>
<div class="block">Read an accessible static Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to read</dd>
<dt><span class="strong">Returns:</span></dt><dd>the field value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null or not static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readStaticField(java.lang.reflect.Field&nbsp;field,
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throws java.lang.IllegalAccessException</pre>
<div class="block">Read a static Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to read</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the field value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null or not static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readStaticField(java.lang.Class&nbsp;cls,
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<div class="block">Read the named public static field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - the class to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd>
<dt><span class="strong">Returns:</span></dt><dd>the value of the field</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readStaticField(java.lang.Class&nbsp;cls,
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boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Read the named static field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - the class to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the Field object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readField(java.lang.reflect.Field&nbsp;field,
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<div class="block">Read an accessible Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - the field to use</dd><dd><code>target</code> - the object to call on, may be null for static fields</dd>
<dt><span class="strong">Returns:</span></dt><dd>the field value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readField(java.lang.reflect.Field&nbsp;field,
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<div class="block">Read a Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - the field to use</dd><dd><code>target</code> - the object to call on, may be null for static fields</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the field value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readField(java.lang.Object&nbsp;target,
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<div class="block">Read the named public field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>target</code> - the object to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd>
<dt><span class="strong">Returns:</span></dt><dd>the value of the field</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the named field is not public</dd></dl>
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<pre>public static&nbsp;java.lang.Object&nbsp;readField(java.lang.Object&nbsp;target,
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boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Read the named field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>target</code> - the object to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the field value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the class or field name is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the named field is not made accessible</dd></dl>
</li>
</ul>
<a name="writeStaticField(java.lang.reflect.Field, java.lang.Object)">
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</a>
<ul class="blockList">
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<h4>writeStaticField</h4>
<pre>public static&nbsp;void&nbsp;writeStaticField(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;value)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a public static Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to write</dd><dd><code>value</code> - to set</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null or not static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not public or is final</dd></dl>
</li>
</ul>
<a name="writeStaticField(java.lang.reflect.Field, java.lang.Object, boolean)">
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<li class="blockList">
<h4>writeStaticField</h4>
<pre>public static&nbsp;void&nbsp;writeStaticField(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a static Field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to write</dd><dd><code>value</code> - to set</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null or not static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible or is
final</dd></dl>
</li>
</ul>
<a name="writeStaticField(java.lang.Class, java.lang.String, java.lang.Object)">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>writeStaticField</h4>
<pre>public static&nbsp;void&nbsp;writeStaticField(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a named public static Field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - Class on which the Field is to be found</dd><dd><code>fieldName</code> - to write</dd><dd><code>value</code> - to set</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field cannot be located or is not
static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not public or is final</dd></dl>
</li>
</ul>
<a name="writeStaticField(java.lang.Class, java.lang.String, java.lang.Object, boolean)">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>writeStaticField</h4>
<pre>public static&nbsp;void&nbsp;writeStaticField(java.lang.Class&nbsp;cls,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a named static Field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cls</code> - Class on which the Field is to be found</dd><dd><code>fieldName</code> - to write</dd><dd><code>value</code> - to set</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field cannot be located or is not
static</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible or is
final</dd></dl>
</li>
</ul>
<a name="writeField(java.lang.reflect.Field, java.lang.Object, java.lang.Object)">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>writeField</h4>
<pre>public static&nbsp;void&nbsp;writeField(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;target,
java.lang.Object&nbsp;value)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write an accessible field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to write</dd><dd><code>target</code> - the object to call on, may be null for static fields</dd><dd><code>value</code> - to set</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not accessible or is final</dd></dl>
</li>
</ul>
<a name="writeField(java.lang.reflect.Field, java.lang.Object, java.lang.Object, boolean)">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>writeField</h4>
<pre>public static&nbsp;void&nbsp;writeField(java.lang.reflect.Field&nbsp;field,
java.lang.Object&nbsp;target,
java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a field.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>field</code> - to write</dd><dd><code>target</code> - the object to call on, may be null for static fields</dd><dd><code>value</code> - to set</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if the field is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible or is
final</dd></dl>
</li>
</ul>
<a name="writeField(java.lang.Object, java.lang.String, java.lang.Object)">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>writeField</h4>
<pre>public static&nbsp;void&nbsp;writeField(java.lang.Object&nbsp;target,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a public field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>target</code> - the object to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd><dd><code>value</code> - to set</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if <code>target</code> or
<code>fieldName</code> is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not accessible</dd></dl>
</li>
</ul>
<a name="writeField(java.lang.Object, java.lang.String, java.lang.Object, boolean)">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>writeField</h4>
<pre>public static&nbsp;void&nbsp;writeField(java.lang.Object&nbsp;target,
java.lang.String&nbsp;fieldName,
java.lang.Object&nbsp;value,
boolean&nbsp;forceAccess)
throws java.lang.IllegalAccessException</pre>
<div class="block">Write a field. Superclasses will be considered.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>target</code> - the object to reflect, must not be null</dd><dd><code>fieldName</code> - the field name to obtain</dd><dd><code>value</code> - to set</dd><dd><code>forceAccess</code> - whether to break scope restrictions using the
<code>setAccessible</code> method. <code>False</code> will
only match public fields.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.IllegalArgumentException</code> - if <code>target</code> or
<code>fieldName</code> is null</dd>
<dd><code>java.lang.IllegalAccessException</code> - if the field is not made accessible</dd></dl>
</li>
</ul>
</li>
</ul>
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