<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!-- NewPage --> <html lang="en"> <head> <!-- Generated by javadoc (1.8.0_191) on Wed Oct 31 14:00:33 UTC 2018 --> <title>MapChangeListener.Change (JavaFX 8)</title> <meta name="date" content="2018-10-31"> <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style"> <script type="text/javascript" src="../../script.js"></script> </head> <body> <script type="text/javascript"><!-- try { if (location.href.indexOf('is-external=true') == -1) { parent.document.title="MapChangeListener.Change (JavaFX 8)"; } } catch(err) { } //--> var methods = {"i0":6,"i1":10,"i2":6,"i3":6,"i4":6,"i5":6}; var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],4:["t3","Abstract Methods"],8:["t4","Concrete Methods"]}; var altColor = "altColor"; var rowColor = "rowColor"; var tableTab = "tableTab"; var activeTableTab = "activeTableTab"; </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript> <!-- ========= START OF TOP NAVBAR ======= --> <div class="topNav"><a name="navbar.top"> <!-- --> </a> <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> <a name="navbar.top.firstrow"> <!-- --> </a> <ul class="navList" title="Navigation"> <li><a href="../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/MapChangeListener.Change.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../deprecated-list.html">Deprecated</a></li> <li><a href="../../index-all.html">Index</a></li> <li><a href="../../help-doc.html">Help</a></li> </ul> <div class="aboutLanguage">JavaFX 8</div> </div> <div class="subNav"> <ul class="navList"> <li><a href="../../javafx/collections/MapChangeListener.html" title="interface in javafx.collections"><span class="typeNameLink">Prev Class</span></a></li> <li><a href="../../javafx/collections/ModifiableObservableListBase.html" title="class in javafx.collections"><span class="typeNameLink">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../index.html?javafx/collections/MapChangeListener.Change.html" target="_top">Frames</a></li> <li><a href="MapChangeListener.Change.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_top"> <li><a href="../../allclasses-noframe.html">All Classes</a></li> </ul> <div> <script type="text/javascript"><!-- allClassesLink = document.getElementById("allclasses_navbar_top"); if(window==top) { allClassesLink.style.display = "block"; } else { allClassesLink.style.display = "none"; } //--> </script> </div> <div> <ul class="subNavList"> <li>Summary: </li> <li>Nested | </li> <li>Field | </li> <li><a href="#constructor.summary">Constr</a> | </li> <li><a href="#method.summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail: </li> <li>Field | </li> <li><a href="#constructor.detail">Constr</a> | </li> <li><a href="#method.detail">Method</a></li> </ul> </div> <a name="skip.navbar.top"> <!-- --> </a></div> <!-- ========= END OF TOP NAVBAR ========= --> <!-- ======== START OF CLASS DATA ======== --> <div class="header"> <div class="subTitle">javafx.collections</div> <h2 title="Class MapChangeListener.Change" class="title">Class MapChangeListener.Change<K,V></h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>javafx.collections.MapChangeListener.Change<K,V></li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <dl> <dt><span class="paramLabel">Type Parameters:</span></dt> <dd><code>K</code> - key type</dd> <dd><code>V</code> - value type</dd> </dl> <dl> <dt>Enclosing interface:</dt> <dd><a href="../../javafx/collections/MapChangeListener.html" title="interface in javafx.collections">MapChangeListener</a><<a href="../../javafx/collections/MapChangeListener.html" title="type parameter in MapChangeListener">K</a>,<a href="../../javafx/collections/MapChangeListener.html" title="type parameter in MapChangeListener">V</a>></dd> </dl> <hr> <br> <pre>public abstract static class <span class="typeNameLabel">MapChangeListener.Change<K,V></span> extends java.lang.Object</pre> <div class="block">An elementary change done to an ObservableMap. Change contains information about a put or remove operation. Note that put operation might remove an element if there was already a value associated with the same key. In this case wasAdded() and wasRemoved() will both return true.</div> <dl> <dt><span class="simpleTagLabel">Since:</span></dt> <dd>JavaFX 2.0</dd> </dl> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList"> <!-- ======== CONSTRUCTOR SUMMARY ======== --> <ul class="blockList"> <li class="blockList"><a name="constructor.summary"> <!-- --> </a> <h3>Constructor Summary</h3> <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd"> </span></caption> <tr> <th class="colOne" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colOne"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#Change-javafx.collections.ObservableMap-">Change</a></span>(<a href="../../javafx/collections/ObservableMap.html" title="interface in javafx.collections">ObservableMap</a><<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a>,<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a>> map)</code> <div class="block">Constructs a change associated with a map.</div> </td> </tr> </table> </li> </ul> <!-- ========== METHOD SUMMARY =========== --> <ul class="blockList"> <li class="blockList"><a name="method.summary"> <!-- --> </a> <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><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete 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>abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#getKey--">getKey</a></span>()</code> <div class="block">A key associated with the change.</div> </td> </tr> <tr id="i1" class="rowColor"> <td class="colFirst"><code><a href="../../javafx/collections/ObservableMap.html" title="interface in javafx.collections">ObservableMap</a><<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a>,<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a>></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#getMap--">getMap</a></span>()</code> <div class="block">An observable map that is associated with the change.</div> </td> </tr> <tr id="i2" class="altColor"> <td class="colFirst"><code>abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#getValueAdded--">getValueAdded</a></span>()</code> <div class="block">Get the new value of the key.</div> </td> </tr> <tr id="i3" class="rowColor"> <td class="colFirst"><code>abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#getValueRemoved--">getValueRemoved</a></span>()</code> <div class="block">Get the old value of the key.</div> </td> </tr> <tr id="i4" class="altColor"> <td class="colFirst"><code>abstract boolean</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#wasAdded--">wasAdded</a></span>()</code> <div class="block">If this change is a result of add operation.</div> </td> </tr> <tr id="i5" class="rowColor"> <td class="colFirst"><code>abstract boolean</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../javafx/collections/MapChangeListener.Change.html#wasRemoved--">wasRemoved</a></span>()</code> <div class="block">If this change is a result of removal operation.</div> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> <!-- --> </a> <h3>Methods inherited from class java.lang.Object</h3> <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> </ul> </li> </ul> </li> </ul> </div> <div class="details"> <ul class="blockList"> <li class="blockList"> <!-- ========= CONSTRUCTOR DETAIL ======== --> <ul class="blockList"> <li class="blockList"><a name="constructor.detail"> <!-- --> </a> <h3>Constructor Detail</h3> <a name="Change-javafx.collections.ObservableMap-"> <!-- --> </a> <ul class="blockListLast"> <li class="blockList"> <h4>Change</h4> <pre>public Change(<a href="../../javafx/collections/ObservableMap.html" title="interface in javafx.collections">ObservableMap</a><<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a>,<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a>> map)</pre> <div class="block">Constructs a change associated with a map.</div> <dl> <dt><span class="paramLabel">Parameters:</span></dt> <dd><code>map</code> - the source of the change</dd> </dl> </li> </ul> </li> </ul> <!-- ============ METHOD DETAIL ========== --> <ul class="blockList"> <li class="blockList"><a name="method.detail"> <!-- --> </a> <h3>Method Detail</h3> <a name="getMap--"> <!-- --> </a> <ul class="blockList"> <li class="blockList"> <h4>getMap</h4> <pre>public <a href="../../javafx/collections/ObservableMap.html" title="interface in javafx.collections">ObservableMap</a><<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a>,<a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a>> getMap()</pre> <div class="block">An observable map that is associated with the change.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>the source map</dd> </dl> </li> </ul> <a name="wasAdded--"> <!-- --> </a> <ul class="blockList"> <li class="blockList"> <h4>wasAdded</h4> <pre>public abstract boolean wasAdded()</pre> <div class="block">If this change is a result of add operation.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>true if a new value (or key-value) entry was added to the map</dd> </dl> </li> </ul> <a name="wasRemoved--"> <!-- --> </a> <ul class="blockList"> <li class="blockList"> <h4>wasRemoved</h4> <pre>public abstract boolean wasRemoved()</pre> <div class="block">If this change is a result of removal operation. Note that an element might be removed even as a result of put operation.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>true if an old value (or key-value) entry was removed from the map</dd> </dl> </li> </ul> <a name="getKey--"> <!-- --> </a> <ul class="blockList"> <li class="blockList"> <h4>getKey</h4> <pre>public abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">K</a> getKey()</pre> <div class="block">A key associated with the change. If the change is a remove change, the key no longer exist in a map. Otherwise, the key got set to a new value.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>the key that changed</dd> </dl> </li> </ul> <a name="getValueAdded--"> <!-- --> </a> <ul class="blockList"> <li class="blockList"> <h4>getValueAdded</h4> <pre>public abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a> getValueAdded()</pre> <div class="block">Get the new value of the key. Return null if this is a removal.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>the value that is now associated with the key</dd> </dl> </li> </ul> <a name="getValueRemoved--"> <!-- --> </a> <ul class="blockListLast"> <li class="blockList"> <h4>getValueRemoved</h4> <pre>public abstract <a href="../../javafx/collections/MapChangeListener.Change.html" title="type parameter in MapChangeListener.Change">V</a> getValueRemoved()</pre> <div class="block">Get the old value of the key. This is null if and only if the value was added to the key that was not previously in the map.</div> <dl> <dt><span class="returnLabel">Returns:</span></dt> <dd>the value previously associated with the key</dd> </dl> </li> </ul> </li> </ul> </li> </ul> </div> </div> <!-- ========= END OF CLASS DATA ========= --> <!-- ======= START OF BOTTOM NAVBAR ====== --> <div class="bottomNav"><a name="navbar.bottom"> <!-- --> </a> <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> <a name="navbar.bottom.firstrow"> <!-- --> </a> <ul class="navList" title="Navigation"> <li><a href="../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/MapChangeListener.Change.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../deprecated-list.html">Deprecated</a></li> <li><a href="../../index-all.html">Index</a></li> <li><a href="../../help-doc.html">Help</a></li> </ul> <div class="aboutLanguage">JavaFX 8</div> </div> <div class="subNav"> <ul class="navList"> <li><a href="../../javafx/collections/MapChangeListener.html" title="interface in javafx.collections"><span class="typeNameLink">Prev Class</span></a></li> <li><a href="../../javafx/collections/ModifiableObservableListBase.html" title="class in javafx.collections"><span class="typeNameLink">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../index.html?javafx/collections/MapChangeListener.Change.html" target="_top">Frames</a></li> <li><a href="MapChangeListener.Change.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_bottom"> <li><a href="../../allclasses-noframe.html">All Classes</a></li> </ul> <div> <script type="text/javascript"><!-- allClassesLink = document.getElementById("allclasses_navbar_bottom"); if(window==top) { allClassesLink.style.display = "block"; } else { allClassesLink.style.display = "none"; } //--> </script> </div> <div> <ul class="subNavList"> <li>Summary: </li> <li>Nested | </li> <li>Field | </li> <li><a href="#constructor.summary">Constr</a> | </li> <li><a href="#method.summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail: </li> <li>Field | </li> <li><a href="#constructor.detail">Constr</a> | </li> <li><a href="#method.detail">Method</a></li> </ul> </div> <a name="skip.navbar.bottom"> <!-- --> </a></div> <!-- ======== END OF BOTTOM NAVBAR ======= --> <p class="legalCopy"><small><font size="-1"><a href="http://bugreport.java.com/bugreport/" target="_blank">Submit a bug or feature</a><br>For further API reference and developer documentation, see <a href="https://docs.oracle.com/javase/8/docs/index.html" target="_blank">Java SE Documentation</a>. 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