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<div class="subTitle">javafx.scene.control</div>
<h2 title="Class Alert" class="title">Class Alert</h2>
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<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control">javafx.scene.control.Dialog</a><<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>></li>
<li>
<ul class="inheritance">
<li>javafx.scene.control.Alert</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../javafx/event/EventTarget.html" title="interface in javafx.event">EventTarget</a></dd>
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<pre>public class <span class="typeNameLabel">Alert</span>
extends <a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control">Dialog</a><<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>></pre>
<div class="block">The Alert class subclasses the <a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> class, and provides support for a number
of pre-built dialog types that can be easily shown to users to prompt for a
response. Therefore, for many users, the Alert class is the most suited class
for their needs (as opposed to using <a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> directly). Alternatively,
users who want to prompt a user for text input or to make a choice from a list
of options would be better served by using <a href="../../../javafx/scene/control/TextInputDialog.html" title="class in javafx.scene.control"><code>TextInputDialog</code></a> and
<a href="../../../javafx/scene/control/ChoiceDialog.html" title="class in javafx.scene.control"><code>ChoiceDialog</code></a>, respectively.
<p>When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value. It is by passing in this value that the Alert instance will
configure itself appropriately (by setting default values for many of the
<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> properties, including <a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>,
<a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>header</code></a>, and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a>,
as well as the default <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> that are expected in
a dialog of the given type.
<p>To instantiate (but not yet show) an Alert, simply use code such as the following:
<code>Alert alert = new Alert(AlertType.CONFIRMATION, "Are you sure you want to format your system?");</code>
<p>Once an Alert is instantiated, we must show it. More often than not, alerts
(and dialogs in general) are shown in a modal and blocking fashion. 'Modal'
means that the dialog prevents user interaction with the owning application
whilst it is showing, and 'blocking' means that code execution stops at the
point in which the dialog is shown. This means that you can show a dialog,
await the user response, and then continue running the code that directly
follows the show call, giving developers the ability to immediately deal with
the user input from the dialog (if relevant).
<p>JavaFX dialogs are modal by default (you can change this via the
<a href="../../../javafx/scene/control/Dialog.html#initModality-javafx.stage.Modality-"><code>Dialog.initModality(javafx.stage.Modality)</code></a> API). To specify whether you want
blocking or non-blocking dialogs, developers simply choose to call
<a href="../../../javafx/scene/control/Dialog.html#showAndWait--"><code>Dialog.showAndWait()</code></a> or <a href="../../../javafx/scene/control/Dialog.html#show--"><code>Dialog.show()</code></a> (respectively). By default most
developers should choose to use <a href="../../../javafx/scene/control/Dialog.html#showAndWait--"><code>Dialog.showAndWait()</code></a>, given the ease of
coding in these situations. Shown below is three code snippets, showing three
equally valid ways of showing the Alert dialog that was specified above:
<p><strong>Option 1: The 'traditional' approach</strong>
<pre><code> Optional<ButtonType> result = alert.showAndWait();
if (result.isPresent() && result.get() == ButtonType.OK) {
formatSystem();
}</code></pre>
<p><strong>Option 2: The traditional + Optional approach</strong>
<pre><code> alert.showAndWait().ifPresent(response -> {
if (response == ButtonType.OK) {
formatSystem();
}
});</code></pre>
<p><strong>Option 3: The fully lambda approach</strong>
<pre><code> alert.showAndWait()
.filter(response -> response == ButtonType.OK)
.ifPresent(response -> formatSystem());
</code></pre>
<p>There is no better or worse option of the three listed above, so developers
are encouraged to work to their own style preferences. The purpose of showing
the above is to help introduce developers to the <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util"><code>Optional</code></a> API, which
is new in Java 8 and may be foreign to many developers.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JavaFX 8u40</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a>,
<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>,
<a href="../../../javafx/scene/control/TextInputDialog.html" title="class in javafx.scene.control"><code>TextInputDialog</code></a>,
<a href="../../../javafx/scene/control/ChoiceDialog.html" title="class in javafx.scene.control"><code>ChoiceDialog</code></a></dd>
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<h3>Property Summary</h3>
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<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="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">Type</th>
<th class="colLast" scope="col">Property and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../javafx/beans/property/ObjectProperty.html" title="class in javafx.beans.property">ObjectProperty</a><<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a>></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#alertTypeProperty">alertType</a></span></code>
<div class="block">When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value.</div>
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<h3>Properties inherited from class javafx.scene.control.<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control">Dialog</a></h3>
<code><a href="../../../javafx/scene/control/Dialog.html#contentTextProperty">contentText</a>, <a href="../../../javafx/scene/control/Dialog.html#dialogPaneProperty">dialogPane</a>, <a href="../../../javafx/scene/control/Dialog.html#graphicProperty">graphic</a>, <a href="../../../javafx/scene/control/Dialog.html#headerTextProperty">headerText</a>, <a href="../../../javafx/scene/control/Dialog.html#heightProperty">height</a>, <a href="../../../javafx/scene/control/Dialog.html#onCloseRequestProperty">onCloseRequest</a>, <a href="../../../javafx/scene/control/Dialog.html#onHiddenProperty">onHidden</a>, <a href="../../../javafx/scene/control/Dialog.html#onHidingProperty">onHiding</a>, <a href="../../../javafx/scene/control/Dialog.html#onShowingProperty">onShowing</a>, <a href="../../../javafx/scene/control/Dialog.html#onShownProperty">onShown</a>, <a href="../../../javafx/scene/control/Dialog.html#resizableProperty">resizable</a>, <a href="../../../javafx/scene/control/Dialog.html#resultConverterProperty">resultConverter</a>, <a href="../../../javafx/scene/control/Dialog.html#resultProperty">result</a>, <a href="../../../javafx/scene/control/Dialog.html#showingProperty">showing</a>, <a href="../../../javafx/scene/control/Dialog.html#titleProperty">title</a>, <a href="../../../javafx/scene/control/Dialog.html#widthProperty">width</a>, <a href="../../../javafx/scene/control/Dialog.html#xProperty">x</a>, <a href="../../../javafx/scene/control/Dialog.html#yProperty">y</a></code></li>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a></span></code>
<div class="block">An enumeration containing the available, pre-built alert types that
the <a href="../../../javafx/scene/control/Alert.html" title="class in javafx.scene.control"><code>Alert</code></a> class can use to pre-populate various properties.</div>
</td>
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<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="../../../javafx/scene/control/Alert.html#Alert-javafx.scene.control.Alert.AlertType-">Alert</a></span>(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType)</code>
<div class="block">Creates an alert with the given AlertType (refer to the <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
documentation for clarification over which one is most appropriate).</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#Alert-javafx.scene.control.Alert.AlertType-java.lang.String-javafx.scene.control.ButtonType...-">Alert</a></span>(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> contentText,
<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>... buttons)</code>
<div class="block">Creates an alert with the given contentText, ButtonTypes, and AlertType
(refer to the <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a> documentation for clarification over which
one is most appropriate).</div>
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<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="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>
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<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../javafx/beans/property/ObjectProperty.html" title="class in javafx.beans.property">ObjectProperty</a><<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a>></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#alertTypeProperty--">alertTypeProperty</a></span>()</code>
<div class="block">When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#getAlertType--">getAlertType</a></span>()</code>
<div class="block">Gets the value of the property alertType.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections">ObservableList</a><<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#getButtonTypes--">getButtonTypes</a></span>()</code>
<div class="block">Returns an <a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections"><code>ObservableList</code></a> of all <a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control"><code>ButtonType</code></a> instances that
are currently set inside this Alert instance.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javafx/scene/control/Alert.html#setAlertType-javafx.scene.control.Alert.AlertType-">setAlertType</a></span>(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType)</code>
<div class="block">Sets the value of the property alertType.</div>
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<h3>Methods inherited from class javafx.scene.control.<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control">Dialog</a></h3>
<code><a href="../../../javafx/scene/control/Dialog.html#buildEventDispatchChain-javafx.event.EventDispatchChain-">buildEventDispatchChain</a>, <a href="../../../javafx/scene/control/Dialog.html#close--">close</a>, <a href="../../../javafx/scene/control/Dialog.html#contentTextProperty--">contentTextProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#dialogPaneProperty--">dialogPaneProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#getContentText--">getContentText</a>, <a href="../../../javafx/scene/control/Dialog.html#getDialogPane--">getDialogPane</a>, <a href="../../../javafx/scene/control/Dialog.html#getGraphic--">getGraphic</a>, <a href="../../../javafx/scene/control/Dialog.html#getHeaderText--">getHeaderText</a>, <a href="../../../javafx/scene/control/Dialog.html#getHeight--">getHeight</a>, <a href="../../../javafx/scene/control/Dialog.html#getModality--">getModality</a>, <a href="../../../javafx/scene/control/Dialog.html#getOnCloseRequest--">getOnCloseRequest</a>, <a href="../../../javafx/scene/control/Dialog.html#getOnHidden--">getOnHidden</a>, <a href="../../../javafx/scene/control/Dialog.html#getOnHiding--">getOnHiding</a>, <a href="../../../javafx/scene/control/Dialog.html#getOnShowing--">getOnShowing</a>, <a href="../../../javafx/scene/control/Dialog.html#getOnShown--">getOnShown</a>, <a href="../../../javafx/scene/control/Dialog.html#getOwner--">getOwner</a>, <a href="../../../javafx/scene/control/Dialog.html#getResult--">getResult</a>, <a href="../../../javafx/scene/control/Dialog.html#getResultConverter--">getResultConverter</a>, <a href="../../../javafx/scene/control/Dialog.html#getTitle--">getTitle</a>, <a href="../../../javafx/scene/control/Dialog.html#getWidth--">getWidth</a>, <a href="../../../javafx/scene/control/Dialog.html#getX--">getX</a>, <a href="../../../javafx/scene/control/Dialog.html#getY--">getY</a>, <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--">graphicProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--">headerTextProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#heightProperty--">heightProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#hide--">hide</a>, <a href="../../../javafx/scene/control/Dialog.html#initModality-javafx.stage.Modality-">initModality</a>, <a href="../../../javafx/scene/control/Dialog.html#initOwner-javafx.stage.Window-">initOwner</a>, <a href="../../../javafx/scene/control/Dialog.html#initStyle-javafx.stage.StageStyle-">initStyle</a>, <a href="../../../javafx/scene/control/Dialog.html#isResizable--">isResizable</a>, <a href="../../../javafx/scene/control/Dialog.html#isShowing--">isShowing</a>, <a href="../../../javafx/scene/control/Dialog.html#onCloseRequestProperty--">onCloseRequestProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#onHiddenProperty--">onHiddenProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#onHidingProperty--">onHidingProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#onShowingProperty--">onShowingProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#onShownProperty--">onShownProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#resizableProperty--">resizableProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#resultConverterProperty--">resultConverterProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#resultProperty--">resultProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#setContentText-java.lang.String-">setContentText</a>, <a href="../../../javafx/scene/control/Dialog.html#setDialogPane-javafx.scene.control.DialogPane-">setDialogPane</a>, <a href="../../../javafx/scene/control/Dialog.html#setGraphic-javafx.scene.Node-">setGraphic</a>, <a href="../../../javafx/scene/control/Dialog.html#setHeaderText-java.lang.String-">setHeaderText</a>, <a href="../../../javafx/scene/control/Dialog.html#setHeight-double-">setHeight</a>, <a href="../../../javafx/scene/control/Dialog.html#setOnCloseRequest-javafx.event.EventHandler-">setOnCloseRequest</a>, <a href="../../../javafx/scene/control/Dialog.html#setOnHidden-javafx.event.EventHandler-">setOnHidden</a>, <a href="../../../javafx/scene/control/Dialog.html#setOnHiding-javafx.event.EventHandler-">setOnHiding</a>, <a href="../../../javafx/scene/control/Dialog.html#setOnShowing-javafx.event.EventHandler-">setOnShowing</a>, <a href="../../../javafx/scene/control/Dialog.html#setOnShown-javafx.event.EventHandler-">setOnShown</a>, <a href="../../../javafx/scene/control/Dialog.html#setResizable-boolean-">setResizable</a>, <a href="../../../javafx/scene/control/Dialog.html#setResult-R-">setResult</a>, <a href="../../../javafx/scene/control/Dialog.html#setResultConverter-javafx.util.Callback-">setResultConverter</a>, <a href="../../../javafx/scene/control/Dialog.html#setTitle-java.lang.String-">setTitle</a>, <a href="../../../javafx/scene/control/Dialog.html#setWidth-double-">setWidth</a>, <a href="../../../javafx/scene/control/Dialog.html#setX-double-">setX</a>, <a href="../../../javafx/scene/control/Dialog.html#setY-double-">setY</a>, <a href="../../../javafx/scene/control/Dialog.html#show--">show</a>, <a href="../../../javafx/scene/control/Dialog.html#showAndWait--">showAndWait</a>, <a href="../../../javafx/scene/control/Dialog.html#showingProperty--">showingProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#titleProperty--">titleProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#widthProperty--">widthProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#xProperty--">xProperty</a>, <a href="../../../javafx/scene/control/Dialog.html#yProperty--">yProperty</a></code></li>
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<h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <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>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <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>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Property Detail</h3>
<a name="alertTypeProperty">
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<h4>alertType</h4>
<pre>public final <a href="../../../javafx/beans/property/ObjectProperty.html" title="class in javafx.beans.property">ObjectProperty</a><<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a>> alertTypeProperty</pre>
<div class="block">When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value. It is by passing in this value that the Alert instance will
configure itself appropriately (by setting default values for many of the
<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> properties, including <a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>,
<a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>header</code></a>, and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a>,
as well as the default <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> that are expected in
a dialog of the given type.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../javafx/scene/control/Alert.html#getAlertType--"><code>getAlertType()</code></a>,
<a href="../../../javafx/scene/control/Alert.html#setAlertType-javafx.scene.control.Alert.AlertType-"><code>setAlertType(AlertType)</code></a></dd>
</dl>
</li>
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<h3>Constructor Detail</h3>
<a name="Alert-javafx.scene.control.Alert.AlertType-">
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<h4>Alert</h4>
<pre>public Alert(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType)</pre>
<div class="block">Creates an alert with the given AlertType (refer to the <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
documentation for clarification over which one is most appropriate).
<p>By passing in an AlertType, default values for the
<a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>, <a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>headerText</code></a>,
and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a> properties are set, as well as the
relevant <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> being installed. Once the Alert
is instantiated, developers are able to modify the values of the alert as
desired.
<p>It is important to note that the one property that does not have a
default value set, and which therefore the developer must set, is the
<a href="../../../javafx/scene/control/Dialog.html#contentTextProperty--"><code>content text</code></a> property (or alternatively,
the developer may call <code>alert.getDialogPane().setContent(Node)</code> if
they want a more complex alert). If the contentText (or content) properties
are not set, there is no useful information presented to end users.</div>
</li>
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<h4>Alert</h4>
<pre>public Alert(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> contentText,
<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>... buttons)</pre>
<div class="block">Creates an alert with the given contentText, ButtonTypes, and AlertType
(refer to the <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a> documentation for clarification over which
one is most appropriate).
<p>By passing in a variable number of ButtonType arguments, the developer
is directly overriding the default buttons that will be displayed in the
dialog, replacing the pre-defined buttons with whatever is specified in the
varargs array.
<p>By passing in an AlertType, default values for the
<a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>, <a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>headerText</code></a>,
and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a> properties are set. Once the Alert
is instantiated, developers are able to modify the values of the alert as
desired.</div>
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<h4>getAlertType</h4>
<pre>public final <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> getAlertType()</pre>
<div class="block">Gets the value of the property alertType.</div>
<dl>
<dt><span class="simpleTagLabel">Property description:</span></dt>
<dd>When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value. It is by passing in this value that the Alert instance will
configure itself appropriately (by setting default values for many of the
<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> properties, including <a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>,
<a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>header</code></a>, and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a>,
as well as the default <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> that are expected in
a dialog of the given type.</dd>
</dl>
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<h4>setAlertType</h4>
<pre>public final void setAlertType(<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a> alertType)</pre>
<div class="block">Sets the value of the property alertType.</div>
<dl>
<dt><span class="simpleTagLabel">Property description:</span></dt>
<dd>When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value. It is by passing in this value that the Alert instance will
configure itself appropriately (by setting default values for many of the
<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> properties, including <a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>,
<a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>header</code></a>, and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a>,
as well as the default <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> that are expected in
a dialog of the given type.</dd>
</dl>
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<h4>alertTypeProperty</h4>
<pre>public final <a href="../../../javafx/beans/property/ObjectProperty.html" title="class in javafx.beans.property">ObjectProperty</a><<a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control">Alert.AlertType</a>> alertTypeProperty()</pre>
<div class="block">When creating an Alert instance, users must pass in an <a href="../../../javafx/scene/control/Alert.AlertType.html" title="enum in javafx.scene.control"><code>Alert.AlertType</code></a>
enumeration value. It is by passing in this value that the Alert instance will
configure itself appropriately (by setting default values for many of the
<a href="../../../javafx/scene/control/Dialog.html" title="class in javafx.scene.control"><code>Dialog</code></a> properties, including <a href="../../../javafx/scene/control/Dialog.html#titleProperty--"><code>title</code></a>,
<a href="../../../javafx/scene/control/Dialog.html#headerTextProperty--"><code>header</code></a>, and <a href="../../../javafx/scene/control/Dialog.html#graphicProperty--"><code>graphic</code></a>,
as well as the default <a href="../../../javafx/scene/control/Alert.html#getButtonTypes--"><code>buttons</code></a> that are expected in
a dialog of the given type.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../javafx/scene/control/Alert.html#getAlertType--"><code>getAlertType()</code></a>,
<a href="../../../javafx/scene/control/Alert.html#setAlertType-javafx.scene.control.Alert.AlertType-"><code>setAlertType(AlertType)</code></a></dd>
</dl>
</li>
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<h4>getButtonTypes</h4>
<pre>public final <a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections">ObservableList</a><<a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control">ButtonType</a>> getButtonTypes()</pre>
<div class="block">Returns an <a href="../../../javafx/collections/ObservableList.html" title="interface in javafx.collections"><code>ObservableList</code></a> of all <a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control"><code>ButtonType</code></a> instances that
are currently set inside this Alert instance. A ButtonType may either be one
of the pre-defined types (e.g. <a href="../../../javafx/scene/control/ButtonType.html#OK"><code>ButtonType.OK</code></a>), or it may be a
custom type (created via the <a href="../../../javafx/scene/control/ButtonType.html#ButtonType-java.lang.String-"><code>ButtonType.ButtonType(String)</code></a> or
<a href="../../../javafx/scene/control/ButtonType.html#ButtonType-java.lang.String-javafx.scene.control.ButtonBar.ButtonData-"><code>ButtonType.ButtonType(String, javafx.scene.control.ButtonBar.ButtonData)</code></a>
constructors.
<p>Readers should refer to the <a href="../../../javafx/scene/control/ButtonType.html" title="class in javafx.scene.control"><code>ButtonType</code></a> class documentation for more details,
but at a high level, each ButtonType instance is converted to
a Node (although most commonly a <a href="../../../javafx/scene/control/Button.html" title="class in javafx.scene.control"><code>Button</code></a>) via the (overridable)
<a href="../../../javafx/scene/control/DialogPane.html#createButton-javafx.scene.control.ButtonType-"><code>DialogPane.createButton(ButtonType)</code></a> method on <a href="../../../javafx/scene/control/DialogPane.html" title="class in javafx.scene.control"><code>DialogPane</code></a>.</div>
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