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| <h2 title="Interface JavaObject" class="title">Interface JavaObject</h2> |
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| <pre>public interface <span class="typeNameLabel">JavaObject</span></pre> |
| <div class="block">Represents a Java Object.</div> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#arraycopy-int-java.lang.Object-int-int-">arraycopy</a></span>(int srcStart, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a> dst, |
| int dstStart, |
| int length)</code> |
| <div class="block">Copies data from the image array into a local Java array.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a> obj)</code> |
| <div class="block">Compares the argument to the receiver, and answers true |
| if they represent the <em>same</em> object using a class |
| specific comparison.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getArraySize--">getArraySize</a></span>()</code> |
| <div class="block">Get the number of elements in this array.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getHashcode--">getHashcode</a></span>()</code> |
| <div class="block">Fetch the basic hash code for the object.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../com/ibm/dtfj/java/JavaHeap.html" title="interface in com.ibm.dtfj.java">JavaHeap</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getHeap--">getHeap</a></span>()</code> |
| <div class="block">Gets the heap where this object is located.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../com/ibm/dtfj/image/ImagePointer.html" title="interface in com.ibm.dtfj.image">ImagePointer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getID--">getID</a></span>()</code> |
| <div class="block">The ID of an object is a unique address is memory which identifies the object.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../com/ibm/dtfj/java/JavaClass.html" title="interface in com.ibm.dtfj.java">JavaClass</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getJavaClass--">getJavaClass</a></span>()</code> |
| <div class="block">Get the JavaClass instance which represents the class of this object.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getPersistentHashcode--">getPersistentHashcode</a></span>()</code> |
| <div class="block">Fetch the basic hash code of the object in the image.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" target="_blank" title="class or interface in java.util">Iterator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getReferences--">getReferences</a></span>()</code> |
| <div class="block">Get the set of references from this object.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" target="_blank" title="class or interface in java.util">Iterator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getSections--">getSections</a></span>()</code> |
| <div class="block">An object is represented in the Java runtime by one or more regions of memory.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getSize--">getSize</a></span>()</code> |
| <div class="block">Get the number of bytes of memory occupied by this object on the heap.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#hashCode--">hashCode</a></span>()</code> |
| <div class="block">Answers an integer hash code for the receiver.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/ibm/dtfj/java/JavaObject.html#isArray--">isArray</a></span>()</code> |
| <div class="block">Is this object an array ?</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| <h3>Method Detail</h3> |
| <a name="getJavaClass--"> |
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| <h4>getJavaClass</h4> |
| <pre><a href="../../../../com/ibm/dtfj/java/JavaClass.html" title="interface in com.ibm.dtfj.java">JavaClass</a> getJavaClass() |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Get the JavaClass instance which represents the class of this object.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the JavaClass instance which represents the class of this object</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| </dl> |
| </li> |
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| <h4>isArray</h4> |
| <pre>boolean isArray() |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Is this object an array ?</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the receiver represents an instance of an array, or |
| false otherwise</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getArraySize--"> |
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| </a> |
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| <h4>getArraySize</h4> |
| <pre>int getArraySize() |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Get the number of elements in this array.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of elements in this array |
| <p></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" target="_blank" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the receiver is not an array</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="arraycopy-int-java.lang.Object-int-int-"> |
| <!-- --> |
| </a> |
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| <h4>arraycopy</h4> |
| <pre>void arraycopy(int srcStart, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a> dst, |
| int dstStart, |
| int length) |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a>, |
| <a href="../../../../com/ibm/dtfj/image/MemoryAccessException.html" title="class in com.ibm.dtfj.image">MemoryAccessException</a></pre> |
| <div class="block">Copies data from the image array into a local Java array. |
| The dst object must be an array of the appropriate type -- |
| a base type array for base types, or a JavaObject array |
| for reference arrays.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>srcStart</code> - index in the receiver to start copying from</dd> |
| <dd><code>dst</code> - the destination array</dd> |
| <dd><code>dstStart</code> - index in the destination array to start copying into</dd> |
| <dd><code>length</code> - the number of elements to be copied</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/MemoryAccessException.html" title="class in com.ibm.dtfj.image">MemoryAccessException</a></code></dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" target="_blank" title="class or interface in java.lang">NullPointerException</a></code> - if dst is null</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" target="_blank" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the receiver is not an array, |
| or if dst is not an array of the appropriate type</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html?is-external=true" target="_blank" title="class or interface in java.lang">IndexOutOfBoundsException</a></code> - if srcStart, dstStart, or length |
| are out of bounds in either the receiver or the destination array</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSize--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSize</h4> |
| <pre>long getSize() |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Get the number of bytes of memory occupied by this object on the heap. |
| The memory may not necessarily be contiguous</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getHashcode--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getHashcode</h4> |
| <pre>long getHashcode() |
| throws <a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a>, |
| <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Fetch the basic hash code for the object. This is the hash code which |
| would be returned if a Java thread had requested it. Typically the hash |
| code is based on the address of an object, and may change if the object |
| is moved by a garbage collect cycle.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the basic hash code of the object in the image.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a></code> - if the hash code cannot be determined</dd> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getPersistentHashcode--"><code>getPersistentHashcode()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getPersistentHashcode--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getPersistentHashcode</h4> |
| <pre>long getPersistentHashcode() |
| throws <a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a>, |
| <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></pre> |
| <div class="block">Fetch the basic hash code of the object in the image. This hash code |
| is guaranteed to be persistent between multiple snapshots of the same Image. |
| If the hash code cannot be determined, or if the hash code for this object |
| could change between snapshots, an exception is thrown. |
| <p> |
| <i>If the VM uses a 'hasBeenHashed' bit, the value of this bit can be |
| inferred by calling getPersistentHashcode(). If the persistent hash code |
| is not available, then the 'hasBeenHashed' bit has not been set, and the |
| hash of the object could change if the object moves between snapshots</i></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the basic hash code of the object in the image</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a></code> - if a hash code cannot be determined, or if the |
| hash code could change between successive snapshots</dd> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../com/ibm/dtfj/java/JavaObject.html#getHashcode--"><code>getHashcode()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getID--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getID</h4> |
| <pre><a href="../../../../com/ibm/dtfj/image/ImagePointer.html" title="interface in com.ibm.dtfj.image">ImagePointer</a> getID()</pre> |
| <div class="block">The ID of an object is a unique address is memory which identifies the object. |
| The data at this memory is implementation defined. The object may be |
| non-contiguous. Portions of the object may appear below or above this address.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the runtime-wide unique identifier for the object</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSections--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSections</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" target="_blank" title="class or interface in java.util">Iterator</a> getSections()</pre> |
| <div class="block">An object is represented in the Java runtime by one or more regions of memory. |
| These include the object's header and the data in the object. |
| |
| In certain allocation strategies, an object's header and data may be allocated |
| contiguously. In this case, this method may return an iterator for a single |
| section. |
| |
| In other schemes, the header may be separate from the data or the data may be |
| broken up into multiple regions. Additionally, this function does not guarantee |
| that the memory used by this object is not also shared by one or more other |
| objects. |
| |
| Callers should not make any assumptions about the contents of the memory.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a collection of sections that make up this object</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../com/ibm/dtfj/image/ImageSection.html" title="interface in com.ibm.dtfj.image"><code>ImageSection</code></a>, |
| <a href="../../../../com/ibm/dtfj/image/CorruptData.html" title="interface in com.ibm.dtfj.image"><code>CorruptData</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getReferences--"> |
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| <h4>getReferences</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" target="_blank" title="class or interface in java.util">Iterator</a> getReferences()</pre> |
| <div class="block">Get the set of references from this object. |
| <p> |
| Corrupt references will be returned as CorruptData objects by the Iterator</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an iterator of JavaReference and CorruptData objects</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../com/ibm/dtfj/java/JavaReference.html" title="interface in com.ibm.dtfj.java"><code>JavaReference</code></a>, |
| <a href="../../../../com/ibm/dtfj/image/CorruptData.html" title="interface in com.ibm.dtfj.image"><code>CorruptData</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getHeap--"> |
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| </a> |
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| <h4>getHeap</h4> |
| <pre><a href="../../../../com/ibm/dtfj/java/JavaHeap.html" title="interface in com.ibm.dtfj.java">JavaHeap</a> getHeap() |
| throws <a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a>, |
| <a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a></pre> |
| <div class="block">Gets the heap where this object is located.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the <code>JavaHeap</code> instance representing the heap where this object is stored in memory.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/CorruptDataException.html" title="class in com.ibm.dtfj.image">CorruptDataException</a></code> - if the heap information for this object is corrupt.</dd> |
| <dd><code><a href="../../../../com/ibm/dtfj/image/DataUnavailable.html" title="class in com.ibm.dtfj.image">DataUnavailable</a></code> - if the heap information for this object is not available.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../com/ibm/dtfj/java/JavaHeap.html" title="interface in com.ibm.dtfj.java"><code>JavaHeap</code></a></dd> |
| </dl> |
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| <h4>equals</h4> |
| <pre>boolean equals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a> obj)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">java.lang.Object</a></code></span></div> |
| <div class="block">Compares the argument to the receiver, and answers true |
| if they represent the <em>same</em> object using a class |
| specific comparison. The implementation in Object answers |
| true only if the argument is the exact same object as the |
| receiver (==).</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>obj</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if the given object refers to the same Java Object in the image</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang"><code>Object.hashCode()</code></a></dd> |
| </dl> |
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| </ul> |
| <a name="hashCode--"> |
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| </a> |
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| <li class="blockList"> |
| <h4>hashCode</h4> |
| <pre>int hashCode()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">java.lang.Object</a></code></span></div> |
| <div class="block">Answers an integer hash code for the receiver. Any two |
| objects which answer <code>true</code> when passed to |
| <code>.equals</code> must answer the same value for this |
| method.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a></code> in class <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" target="_blank" title="class or interface in java.lang">Object</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the receiver's hash.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang"><code>Object.equals(java.lang.Object)</code></a></dd> |
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