uTools-Manuals/docs/java/javax/management/MBeanOperationInfo.html

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     javax.management 
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<h2 class="title" title="Class MBeanOperationInfo">Class MBeanOperationInfo</h2>
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<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
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<li><a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">javax.management.MBeanFeatureInfo</a></li>
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<li>javax.management.MBeanOperationInfo</li>
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<dl>
<dt>
         All Implemented Interfaces: 
       </dt>
<dd>
<span><a href="../../java/io/Serializable.html" title="java.io中的接口">Serializable</a> ， <a href="../../java/lang/Cloneable.html" title="java.lang中的接口">Cloneable</a> ， <a href="../../javax/management/DescriptorRead.html" title="javax.management中的接口">DescriptorRead</a></span>
</dd>
</dl>
<dl>
<dt>
        已知直接子类：
       </dt>
<dd>
<span><a href="../../javax/management/modelmbean/ModelMBeanOperationInfo.html" title="javax.management.modelmbean中的类">ModelMBeanOperationInfo</a> ， <a href="../../javax/management/openmbean/OpenMBeanOperationInfoSupport.html" title="javax.management.openmbean中的类">OpenMBeanOperationInfoSupport</a></span>
</dd>
</dl>
<hr/> <br/> <pre>public class <span class="typeNameLabel">MBeanOperationInfo</span>
extends <a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">MBeanFeatureInfo</a>
implements <a href="../../java/lang/Cloneable.html" title="interface in java.lang">Cloneable</a></pre>
<div class="block">
<span>描述MBean公开的管理操作。</span>
<span>这个类的实例是不可变的。</span>
<span>子类可能是可变的，但不建议这样做。</span>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
         1.5 
       </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../serialized-form.html#javax.management.MBeanOperationInfo">Serialized Form</a>
</dd>
</dl> </li>
</ul>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Field Summary table, listing fields, and an explanation">
<caption>
<span>Fields</span>
<span class="tabEnd"> </span>
</caption>
<tbody>
<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>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#ACTION">ACTION</a></span></code>
<div class="block">
              表示操作是类似的：它具有效果，但不返回MBean中的任何信息。 
            </div> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#ACTION_INFO">ACTION_INFO</a></span></code>
<div class="block">
              表示操作既是类似读写的，也有类似的操作：它具有效果，并且还从MBean返回信息。 
            </div> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#INFO">INFO</a></span></code>
<div class="block">
              表示操作是类似的：它返回信息，但不会更改任何状态。 
            </div> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#UNKNOWN">UNKNOWN</a></span></code>
<div class="block">
              表示操作的影响是未知的或不能使用其他值之一来表达。 
            </div> </td>
</tr>
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<!-- --> </a> <h3>Fields inherited from class javax.management.<a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">MBeanFeatureInfo</a></h3> <code><a href="../../javax/management/MBeanFeatureInfo.html#description">description</a>, <a href="../../javax/management/MBeanFeatureInfo.html#name">name</a></code></li>
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<span>构造方法</span>
<span class="tabEnd"> </span>
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<tbody>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#MBeanOperationInfo-java.lang.String-java.lang.reflect.Method-">MBeanOperationInfo</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> description, <a href="../../java/lang/reflect/Method.html" title="class in java.lang.reflect">方法</a> method)</code>
<div class="block">
              构造一个 
             <code>MBeanOperationInfo</code>对象。 
            </div> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#MBeanOperationInfo-java.lang.String-java.lang.String-javax.management.MBeanParameterInfo:A-java.lang.String-int-">MBeanOperationInfo</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name, <a href="../../java/lang/String.html" title="class in java.lang">String</a> description, <a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[] signature, <a href="../../java/lang/String.html" title="class in java.lang">String</a> type, int impact)</code>
<div class="block">
              构造一个 
             <code>MBeanOperationInfo</code>对象。 
            </div> </td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#MBeanOperationInfo-java.lang.String-java.lang.String-javax.management.MBeanParameterInfo:A-java.lang.String-int-javax.management.Descriptor-">MBeanOperationInfo</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name, <a href="../../java/lang/String.html" title="class in java.lang">String</a> description, <a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[] signature, <a href="../../java/lang/String.html" title="class in java.lang">String</a> type, int impact, <a href="../../javax/management/Descriptor.html" title="interface in javax.management">Descriptor</a> descriptor)</code>
<div class="block">
              构造一个 
             <code>MBeanOperationInfo</code>对象。 
            </div> </td>
</tr>
</tbody>
</table> </li>
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<caption>
<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
</caption>
<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor" id="i0">
<td class="colFirst"><code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#clone--">clone</a></span>()</code>
<div class="block">
              返回此实例的浅克隆。 
            </div> </td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#equals-java.lang.Object-">equals</a></span>(<a href="../../java/lang/Object.html" title="class in java.lang">Object</a> o)</code>
<div class="block">
              将此MBeanOperationInfo与另一个进行比较。 
            </div> </td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#getImpact--">getImpact</a></span>()</code>
<div class="block">
              返回该方法的影响，一个 
             <code>INFO</code> ， 
             <code>ACTION</code> ， 
             <code>ACTION_INFO</code> ， 
             <code>UNKNOWN</code> 。 
            </div> </td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#getReturnType--">getReturnType</a></span>()</code>
<div class="block">
              返回方法的返回值的类型。 
            </div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code><a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#getSignature--">getSignature</a></span>()</code>
<div class="block">
              返回此操作的参数列表。 
            </div> </td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#hashCode--">hashCode</a></span>()</code>
<div class="block">
              返回对象的哈希码值。 
            </div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/management/MBeanOperationInfo.html#toString--">toString</a></span>()</code>
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              返回对象的字符串表示形式。 
            </div> </td>
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<!-- --> </a> <h3>Methods inherited from class javax.management.<a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">MBeanFeatureInfo</a></h3> <code><a href="../../javax/management/MBeanFeatureInfo.html#getDescription--">getDescription</a>, <a href="../../javax/management/MBeanFeatureInfo.html#getDescriptor--">getDescriptor</a>, <a href="../../javax/management/MBeanFeatureInfo.html#getName--">getName</a></code></li>
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<!-- ============ FIELD DETAIL =========== -->
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<li class="blockList"> <h4>INFO</h4> <pre>public static final int INFO</pre>
<div class="block">
            表示操作是类似的：它返回信息，但不会更改任何状态。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../constant-values.html#javax.management.MBeanOperationInfo.INFO">Constant Field Values</a>
</dd>
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<li class="blockList"> <h4>ACTION</h4> <pre>public static final int ACTION</pre>
<div class="block">
            表示操作是类似的：它具有效果，但不返回MBean中的任何信息。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../constant-values.html#javax.management.MBeanOperationInfo.ACTION">Constant Field Values</a>
</dd>
</dl> </li>
</ul> <a name="ACTION_INFO">
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<li class="blockList"> <h4>ACTION_INFO</h4> <pre>public static final int ACTION_INFO</pre>
<div class="block">
            表示操作既是类似读写的，也有类似的操作：它具有效果，并且还从MBean返回信息。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../constant-values.html#javax.management.MBeanOperationInfo.ACTION_INFO">Constant Field Values</a>
</dd>
</dl> </li>
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<li class="blockList"> <h4>UNKNOWN</h4> <pre>public static final int UNKNOWN</pre>
<div class="block">
            表示操作的影响是未知的或不能使用其他值之一来表达。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../constant-values.html#javax.management.MBeanOperationInfo.UNKNOWN">Constant Field Values</a>
</dd>
</dl> </li>
</ul> </li>
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<li class="blockList"> <h4>MBeanOperationInfo</h4> <pre>public MBeanOperationInfo(<a href="../../java/lang/String.html" title="class in java.lang">String</a> description,
                          <a href="../../java/lang/reflect/Method.html" title="class in java.lang.reflect">方法</a> method)</pre>
<div class="block">
<span>构造一个<code>MBeanOperationInfo</code>对象。</span>
<span><a href="../../javax/management/Descriptor.html" title="javax.management中的接口">构造</a>的对象的<code>Descriptor</code>将包括由包含<a href="../../javax/management/DescriptorKey.html" title="javax.management中的注释"><code>DescriptorKey</code></a>元注释的<code>方法</code>对象上的任何注释<a href="../../javax/management/DescriptorKey.html" title="javax.management中的注释">贡献</a>的字段。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>method</code> - 描述MBean操作的 
            <code>java.lang.reflect.Method</code>对象。 
           </dd>
<dd>
<code>description</code> - 操作的可读描述。 
           </dd>
</dl> </li>
</ul> <a name="MBeanOperationInfo-java.lang.String-java.lang.String-javax.management.MBeanParameterInfo:A-java.lang.String-int-">
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<li class="blockList"> <h4>MBeanOperationInfo</h4> <pre>public MBeanOperationInfo(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name,
                          <a href="../../java/lang/String.html" title="class in java.lang">String</a> description,
                          <a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[] signature,
                          <a href="../../java/lang/String.html" title="class in java.lang">String</a> type,
                          int impact)</pre>
<div class="block">
            构造一个 
           <code>MBeanOperationInfo</code>对象。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>name</code> - 方法的名称。 
           </dd>
<dd>
<code>description</code> - 操作的可读描述。 
           </dd>
<dd>
<span><code>signature</code> - <code>MBeanParameterInfo</code>描述方法参数（参数）的对象。</span>
<span>这可能是null，具有与零长度数组相同的效果。</span>
</dd>
<dd>
<code>type</code> - 方法的返回值的类型。 
           </dd>
<dd>
<code>impact</code> -该方法的影响的一个 
            <a href="../../javax/management/MBeanOperationInfo.html#INFO"><code>INFO</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#ACTION"><code>ACTION</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#ACTION_INFO"><code>ACTION_INFO</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#UNKNOWN"><code>UNKNOWN</code></a> 。 
           </dd>
</dl> </li>
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<ul class="blockListLast">
<li class="blockList"> <h4>MBeanOperationInfo</h4> <pre>public MBeanOperationInfo(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name,
                          <a href="../../java/lang/String.html" title="class in java.lang">String</a> description,
                          <a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[] signature,
                          <a href="../../java/lang/String.html" title="class in java.lang">String</a> type,
                          int impact,
                          <a href="../../javax/management/Descriptor.html" title="interface in javax.management">Descriptor</a> descriptor)</pre>
<div class="block">
            构造一个 
           <code>MBeanOperationInfo</code>对象。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>name</code> - 方法的名称。 
           </dd>
<dd>
<code>description</code> - 操作的人类可读描述。 
           </dd>
<dd>
<span><code>signature</code> - <code>MBeanParameterInfo</code>描述方法参数（参数）的对象。</span>
<span>这可能是null，具有与零长度数组相同的效果。</span>
</dd>
<dd>
<code>type</code> - 方法的返回值的类型。 
           </dd>
<dd>
<code>impact</code> -该方法的影响的一个 
            <a href="../../javax/management/MBeanOperationInfo.html#INFO"><code>INFO</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#ACTION"><code>ACTION</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#ACTION_INFO"><code>ACTION_INFO</code></a> ， 
            <a href="../../javax/management/MBeanOperationInfo.html#UNKNOWN"><code>UNKNOWN</code></a> 。 
           </dd>
<dd>
<span><code>descriptor</code> - 操作的描述符。</span>
<span>这可能是空的，这相当于空描述符。</span>
</dd>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             1.6 
           </dd>
</dl> </li>
</ul> </li>
</ul>
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<li class="blockList"><a name="method.detail">
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<ul class="blockList">
<li class="blockList"> <h4>clone</h4> <pre>public <a href="../../java/lang/Object.html" title="class in java.lang">Object</a> clone()</pre>
<div class="block">
<p> <span>返回此实例的浅克隆。</span> <span>该克隆通过简单地调用<tt>super.clone()</tt>获得，从而调用由<tt>Object.clone()</tt>实现的默认原生浅克隆<tt>机制</tt> 。</span> <span>没有更深入地克隆任何内部领域。</span> </p>
<p> <span>由于这个类是不可变的，克隆主要是子类的兴趣。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/lang/Object.html#clone--">clone</a></code>在 
            <code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             这个实例的一个克隆。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../java/lang/Cloneable.html" title="java.lang中的接口"><code>Cloneable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getReturnType--">
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<li class="blockList"> <h4>getReturnType</h4> <pre>public <a href="../../java/lang/String.html" title="class in java.lang">String</a> getReturnType()</pre>
<div class="block">
            返回方法的返回值的类型。 
          </div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             返回类型。 
           </dd>
</dl> </li>
</ul> <a name="getSignature--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getSignature</h4> <pre>public <a href="../../javax/management/MBeanParameterInfo.html" title="class in javax.management">MBeanParameterInfo</a>[] getSignature()</pre>
<div class="block">
<p> <span>返回此操作的参数列表。</span> <span>每个参数由<code>MBeanParameterInfo</code>对象描述。</span> </p>
<p> <span>返回的数组是内部数组的浅拷贝，这意味着它是对<code>MBeanParameterInfo</code>对象的引用的内部数组的副本，但是每个<code>MBeanParameterInfo</code>对象都不被复制。</span> </p>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             一组 
            <code>MBeanParameterInfo</code>对象。 
           </dd>
</dl> </li>
</ul> <a name="getImpact--">
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<ul class="blockList">
<li class="blockList"> <h4>getImpact</h4> <pre>public int getImpact()</pre>
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            返回该方法的影响，一个 
           <code>INFO</code> ， 
           <code>ACTION</code> ， 
           <code>ACTION_INFO</code> ， 
           <code>UNKNOWN</code> 。 
          </div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             影响代码。 
           </dd>
</dl> </li>
</ul> <a name="toString--">
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<ul class="blockList">
<li class="blockList"> <h4>toString</h4> <pre>public <a href="../../java/lang/String.html" title="class in java.lang">String</a> toString()</pre>
<div class="block">
<span class="descfrmTypeLabel">描述从类别复制： <code><a href="../../java/lang/Object.html#toString--">Object</a></code></span>
</div>
<div class="block">
<span>返回对象的字符串表示形式。</span>
<span>一般来说， <code>toString</code>方法返回一个“textually代表”这个对象的字符串。</span>
<span>结果应该是一个简明扼要的表达，容易让人阅读。</span>
<span>建议所有子类覆盖此方法。</span>
<p> <span>该<code>toString</code>类方法<code>Object</code>返回一个由其中的对象是一个实例，该符号字符`的类的名称的字符串<code>@</code> ”和对象的哈希码的无符号的十六进制表示。</span> <span>换句话说，这个方法返回一个等于下列值的字符串：</span> </p>
<blockquote>
<span><pre>
 getClass().getName() + '@' + Integer.toHexString(hashCode())
 </pre></span>
</blockquote>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/lang/Object.html#toString--">toString</a></code>在类别 
            <code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             对象的字符串表示形式。 
           </dd>
</dl> </li>
</ul> <a name="equals-java.lang.Object-">
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<ul class="blockList">
<li class="blockList"> <h4>equals</h4> <pre>public boolean equals(<a href="../../java/lang/Object.html" title="class in java.lang">Object</a> o)</pre>
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            将此MBeanOperationInfo与另一个进行比较。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/management/MBeanFeatureInfo.html#equals-java.lang.Object-">equals</a></code>在类别 
            <code><a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">MBeanFeatureInfo</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>o</code> - 要比较的对象。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>当且仅当<code>o</code>是一个MBeanOperationInfo使得其<a href="../../javax/management/MBeanFeatureInfo.html#getName--"><code>MBeanFeatureInfo.getName()</code></a> ， <a href="../../javax/management/MBeanOperationInfo.html#getReturnType--"><code>getReturnType()</code></a> ， <a href="../../javax/management/MBeanFeatureInfo.html#getDescription--"><code>MBeanFeatureInfo.getDescription()</code></a> ， <a href="../../javax/management/MBeanOperationInfo.html#getImpact--"><code>getImpact()</code></a> ， <a href="../../javax/management/MBeanFeatureInfo.html#getDescriptor--"><code>MBeanFeatureInfo.getDescriptor()</code></a>和<a href="../../javax/management/MBeanOperationInfo.html#getSignature--"><code>getSignature()</code></a>值相等（不一定相同），以与本的MBeanConstructorInfo的。</span>
<span>如果两个签名数组的元素成对相等，则两个签名数组相等。</span>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../java/lang/Object.html#hashCode--"><code>Object.hashCode()</code></a> ， <a href="../../java/util/HashMap.html" title="java.util中的类"><code>HashMap</code></a></span>
</dd>
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<li class="blockList"> <h4>hashCode</h4> <pre>public int hashCode()</pre>
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<span class="descfrmTypeLabel">描述从类别： <code><a href="../../java/lang/Object.html#hashCode--">Object</a></code>复制</span>
</div>
<div class="block">
<span>返回对象的哈希码值。</span>
<span>支持这种方法有利于哈希表，如<a href="../../java/util/HashMap.html" title="java.util中的类"><code>HashMap</code></a>提供的。</span>
<p> <span><code>hashCode</code>的总合同是：</span> </p>
<ul>
<li> <span>只要在执行Java应用程序时多次在同一个对象上调用该方法，则<code>hashCode</code>方法必须始终返回相同的整数，前提是在对象上的<code>equals</code>对比中没有使用任何信息被修改。</span> <span>该整数不需要从一个应用程序的执行到相同应用程序的另一个执行保持一致。</span> </li>
<li> <span>如果根据<code>equals(Object)</code>方法两个对象相等，则在两个对象中的每个对象上调用<code>hashCode</code>方法必须产生相同的整数结果。</span> </li>
<li> <span>根据<a href="../../java/lang/Object.html#equals-java.lang.Object-"><code>Object.equals(java.lang.Object)</code></a>方法，如果两个对象不相等， <em>则不</em>要求在两个对象中的每个对象上调用<code>hashCode</code>方法必须产生不同的整数结果。</span> <span>但是，程序员应该意识到，为不等对象生成不同的整数结果可能会提高哈希表的性能。</span> </li>
</ul>
<p> <span>尽可能多的合理实用，由类<code>Object</code>定义的hashCode方法确实为不同对象返回不同的整数。</span> <span>（这通常通过将对象的内部地址转换为整数来实现，但Java的编程语言不需要此实现技术。）</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/management/MBeanFeatureInfo.html#hashCode--">hashCode</a></code>在 
            <code><a href="../../javax/management/MBeanFeatureInfo.html" title="class in javax.management">MBeanFeatureInfo</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             该对象的哈希码值。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../java/lang/Object.html#equals-java.lang.Object-"><code>Object.equals(java.lang.Object)</code></a> ， 
            <a href="../../java/lang/System.html#identityHashCode-java.lang.Object-"><code>System.identityHashCode(java.lang.Object)</code></a>
</dd>
</dl> </li>
</ul> </li>
</ul> </li>
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