<!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_77) on Fri Apr 22 13:47:01 UTC 2016 --> <title>javafx.beans.value (JavaFX 8)</title> <meta name="date" content="2016-04-22"> <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="javafx.beans.value (JavaFX 8)"; } } catch(err) { } //--> </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 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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> <a name="skip.navbar.top"> <!-- --> </a></div> <!-- ========= END OF TOP NAVBAR ========= --> <div class="header"> <h1 title="Package" class="title">Package javafx.beans.value</h1> <div class="docSummary"> <div class="block">The package <code>javafx.beans.value</code> contains the two fundamental interfaces <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a> and <a href="../../../javafx/beans/value/WritableValue.html" title="interface in javafx.beans.value"><code>WritableValue</code></a> and all of its sub-interfaces.</div> </div> <p>See: <a href="#package.description">Description</a></p> </div> <div class="contentContainer"> <ul class="blockList"> <li class="blockList"> <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation"> <caption><span>Interface Summary</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Interface</th> <th class="colLast" scope="col">Description</th> </tr> <tbody> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ChangeListener.html" title="interface in javafx.beans.value">ChangeListener</a><T></td> <td class="colLast"> <div class="block">A <code>ChangeListener</code> is notified whenever the value of an <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a> changes.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableBooleanValue.html" title="interface in javafx.beans.value">ObservableBooleanValue</a></td> <td class="colLast"> <div class="block">An observable boolean value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableDoubleValue.html" title="interface in javafx.beans.value">ObservableDoubleValue</a></td> <td class="colLast"> <div class="block">An observable double value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableFloatValue.html" title="interface in javafx.beans.value">ObservableFloatValue</a></td> <td class="colLast"> <div class="block">An observable float value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableIntegerValue.html" title="interface in javafx.beans.value">ObservableIntegerValue</a></td> <td class="colLast"> <div class="block">An observable integer value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableListValue.html" title="interface in javafx.beans.value">ObservableListValue</a><E></td> <td class="colLast"> <div class="block">An observable reference to an <a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections"><code>ObservableList</code></a>.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableLongValue.html" title="interface in javafx.beans.value">ObservableLongValue</a></td> <td class="colLast"> <div class="block">An observable long value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableMapValue.html" title="interface in javafx.beans.value">ObservableMapValue</a><K,V></td> <td class="colLast"> <div class="block">An observable reference to an <a href="../../../javafx/collections/ObservableMap.html" title="interface in javafx.collections"><code>ObservableMap</code></a>.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableNumberValue.html" title="interface in javafx.beans.value">ObservableNumberValue</a></td> <td class="colLast"> <div class="block">A common interface of all sub-interfaces of <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a> that wrap a number.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableObjectValue.html" title="interface in javafx.beans.value">ObservableObjectValue</a><T></td> <td class="colLast"> <div class="block">An observable typed <code>Object</code> value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableSetValue.html" title="interface in javafx.beans.value">ObservableSetValue</a><E></td> <td class="colLast"> <div class="block">An observable reference to an <a href="../../../javafx/collections/ObservableSet.html" title="interface in javafx.collections"><code>ObservableSet</code></a>.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableStringValue.html" title="interface in javafx.beans.value">ObservableStringValue</a></td> <td class="colLast"> <div class="block">An observable String value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value">ObservableValue</a><T></td> <td class="colLast"> <div class="block">An <code>ObservableValue</code> is an entity that wraps a value and allows to observe the value for changes.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableBooleanValue.html" title="interface in javafx.beans.value">WritableBooleanValue</a></td> <td class="colLast"> <div class="block">A writable boolean value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableDoubleValue.html" title="interface in javafx.beans.value">WritableDoubleValue</a></td> <td class="colLast"> <div class="block">A writable double value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableFloatValue.html" title="interface in javafx.beans.value">WritableFloatValue</a></td> <td class="colLast"> <div class="block">A writable float value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableIntegerValue.html" title="interface in javafx.beans.value">WritableIntegerValue</a></td> <td class="colLast"> <div class="block">A writable int value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableListValue.html" title="interface in javafx.beans.value">WritableListValue</a><E></td> <td class="colLast"> <div class="block">A writable reference to an <a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections"><code>ObservableList</code></a>.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableLongValue.html" title="interface in javafx.beans.value">WritableLongValue</a></td> <td class="colLast"> <div class="block">A writable long value.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableMapValue.html" title="interface in javafx.beans.value">WritableMapValue</a><K,V></td> <td class="colLast"> <div class="block">A writable reference to an <a href="../../../javafx/collections/ObservableMap.html" title="interface in javafx.collections"><code>ObservableMap</code></a>.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableNumberValue.html" title="interface in javafx.beans.value">WritableNumberValue</a></td> <td class="colLast"> <div class="block">A tagging interface that marks all sub-interfaces of <a href="../../../javafx/beans/value/WritableValue.html" title="interface in javafx.beans.value"><code>WritableValue</code></a> that wrap a number.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableObjectValue.html" title="interface in javafx.beans.value">WritableObjectValue</a><T></td> <td class="colLast"> <div class="block">A writable typed value.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableSetValue.html" title="interface in javafx.beans.value">WritableSetValue</a><E></td> <td class="colLast"> <div class="block">A writable reference to an <a href="../../../javafx/collections/ObservableSet.html" title="interface in javafx.collections"><code>ObservableSet</code></a>.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableStringValue.html" title="interface in javafx.beans.value">WritableStringValue</a></td> <td class="colLast"> <div class="block">A writable String.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WritableValue.html" title="interface in javafx.beans.value">WritableValue</a><T></td> <td class="colLast"> <div class="block">A <code>WritableValue</code> is an entity that wraps a value that can be read and set.</div> </td> </tr> </tbody> </table> </li> <li class="blockList"> <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation"> <caption><span>Class Summary</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Class</th> <th class="colLast" scope="col">Description</th> </tr> <tbody> <tr class="altColor"> <td class="colFirst"><a href="../../../javafx/beans/value/ObservableValueBase.html" title="class in javafx.beans.value">ObservableValueBase</a><T></td> <td class="colLast"> <div class="block">A convenience class for creating implementations of <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a>.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><a href="../../../javafx/beans/value/WeakChangeListener.html" title="class in javafx.beans.value">WeakChangeListener</a><T></td> <td class="colLast"> <div class="block">A <code>WeakChangeListener</code> can be used, if an <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a> should only maintain a weak reference to the listener.</div> </td> </tr> </tbody> </table> </li> </ul> <a name="package.description"> <!-- --> </a> <h2 title="Package javafx.beans.value Description">Package javafx.beans.value Description</h2> <div class="block"><p>The package <code>javafx.beans.value</code> contains the two fundamental interfaces <a href="../../../javafx/beans/value/ObservableValue.html" title="interface in javafx.beans.value"><code>ObservableValue</code></a> and <a href="../../../javafx/beans/value/WritableValue.html" title="interface in javafx.beans.value"><code>WritableValue</code></a> and all of its sub-interfaces.</p> <h1>ObservableValue</h1> An ObservableValue wraps a value that can be read and observed for invalidations and changes. Listeners have to implement either <a href="../../../javafx/beans/InvalidationListener.html" title="interface in javafx.beans"><code>InvalidationListener</code></a> or <a href="../../../javafx/beans/value/ChangeListener.html" title="interface in javafx.beans.value"><code>ChangeListener</code></a>. To allow working with primitive types directly a number of sub-interfaces are defined. <table summary="ObservableValue"> <tr> <th>Type</th> <th>Sub-interface of ObservableValue</th> </tr> <tr> <td><code>boolean</code></td> <td><a href="../../../javafx/beans/value/ObservableBooleanValue.html" title="interface in javafx.beans.value"><code>ObservableBooleanValue</code></a></td> </tr> <tr> <td><code>double</code></td> <td><a href="../../../javafx/beans/value/ObservableDoubleValue.html" title="interface in javafx.beans.value"><code>ObservableDoubleValue</code></a></td> </tr> <tr> <td><code>float</code></td> <td><a href="../../../javafx/beans/value/ObservableFloatValue.html" title="interface in javafx.beans.value"><code>ObservableFloatValue</code></a></td> </tr> <tr> <td><code>int</code></td> <td><a href="../../../javafx/beans/value/ObservableIntegerValue.html" title="interface in javafx.beans.value"><code>ObservableIntegerValue</code></a></td> </tr> <tr> <td><code>long</code></td> <td><a href="../../../javafx/beans/value/ObservableLongValue.html" title="interface in javafx.beans.value"><code>ObservableLongValue</code></a></td> </tr> <tr> <td><code>double</code>, <code>float</code>, <code>int</code>, <code>long</code></td> <td><a href="../../../javafx/beans/value/ObservableNumberValue.html" title="interface in javafx.beans.value"><code>ObservableNumberValue</code></a></td> </tr> <tr> <td><code>Object</code></td> <td><a href="../../../javafx/beans/value/ObservableObjectValue.html" title="interface in javafx.beans.value"><code>ObservableObjectValue</code></a></td> </tr> <tr> <td><code>String</code></td> <td><a href="../../../javafx/beans/value/ObservableStringValue.html" title="interface in javafx.beans.value"><code>ObservableStringValue</code></a></td> </tr> </table> <h1>WritableValue</h1> A WritableValue wraps a value that can be read and set. As with <code>ObservableValues</code>, a number of sub-interfaces are defined to work with primitive types directly. <table summary="WritableValue"> <tr> <th>Type</th> <th>Sub-interface of WritableValue</th> </tr> <tr> <td><code>boolean</code></td> <td><a href="../../../javafx/beans/value/WritableBooleanValue.html" title="interface in javafx.beans.value"><code>WritableBooleanValue</code></a></td> </tr> <tr> <td><code>double</code></td> <td><a href="../../../javafx/beans/value/WritableDoubleValue.html" title="interface in javafx.beans.value"><code>WritableDoubleValue</code></a></td> </tr> <tr> <td><code>float</code></td> <td><a href="../../../javafx/beans/value/WritableFloatValue.html" title="interface in javafx.beans.value"><code>WritableFloatValue</code></a></td> </tr> <tr> <td><code>int</code></td> <td><a href="../../../javafx/beans/value/WritableIntegerValue.html" title="interface in javafx.beans.value"><code>WritableIntegerValue</code></a></td> </tr> <tr> <td><code>long</code></td> <td><a href="../../../javafx/beans/value/WritableLongValue.html" title="interface in javafx.beans.value"><code>WritableLongValue</code></a></td> </tr> <tr> <td><code>double</code>, <code>float</code>, <code>int</code>, <code>long</code></td> <td><a href="../../../javafx/beans/value/WritableNumberValue.html" title="interface in javafx.beans.value"><code>WritableNumberValue</code></a></td> </tr> <tr> <td><code>Object</code></td> <td><a href="../../../javafx/beans/value/WritableObjectValue.html" title="interface in javafx.beans.value"><code>WritableObjectValue</code></a></td> </tr> <tr> <td><code>String</code></td> <td><a href="../../../javafx/beans/value/WritableStringValue.html" title="interface in javafx.beans.value"><code>WritableStringValue</code></a></td> </tr> </table></div> </div> <!-- ======= 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 class="navBarCell1Rev">Package</li> <li>Class</li> <li><a href="package-use.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/beans/property/adapter/package-summary.html">Prev Package</a></li> <li><a href="../../../javafx/collections/package-summary.html">Next Package</a></li> </ul> <ul class="navList"> <li><a href="../../../index.html?javafx/beans/value/package-summary.html" target="_top">Frames</a></li> <li><a href="package-summary.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> <a name="skip.navbar.bottom"> <!-- --> </a></div> <!-- ======== END OF BOTTOM NAVBAR ======= --> <p class="legalCopy"><small><small><a href="https://docs.oracle.com/javase/8/docs/legal/cpyr.html">Copyright</a> (c) 2008, 2016, Oracle and/or its affiliates. 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