我在NetBeans的Scene Builder中通过On Mouse Entered调用我的函数时出现问题。我试图用On Mouse Entered事件做简单的代码,但我有一些例外,我真的不知道如何解决这个问题。 我将此功能添加到按钮属性中输入的鼠标,但它不起作用。
这是我的控制器课程:
package firstapp;
import java.awt.event.MouseEvent;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
public class firstAppController implements Initializable {
@FXML
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
}
@FXML
private void fun1(ActionEvent e)
{
System.out.println("It works");
}
@FXML //this function doesn't work with On Mouse Entered
public void fun2(MouseEvent e)
{
System.out.println("It works too");
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
}
}
和FXML:
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320"
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="firstapp.firstAppController">
<children>
<Button fx:id="button1" layoutX="126" layoutY="90" onAction="#fun1"
onMouseEntered="#fun2" text="Click Me!" />
<Label fx:id="label1" layoutX="69.0" layoutY="129.0" text="Label" />
</children>
</AnchorPane>
输出:
Executing
C:\Users\Maczak\Desktop\NetBeans\firstApp\dist\run1545139292\firstApp.jar
using platform C:\Program Files\Java\jdk1.8.0_152\jre/bin/java
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl
.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:748)
Caused by: javafx.fxml.LoadException: Error resolving onMouseEntered='#fun2', either the event handler is not in the Namespace or there is an error in the script.
file:/C:/Users/Maczak/Desktop/NetBeans/firstApp/dist/run1545139292/firstApp.jar!/firstapp/firstApp.fxml:11
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access$100(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at firstapp.FirstApp.start(FirstApp.java:22)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
... 1 more
Exception running application firstapp.FirstApp
Java Result: 1
fun2有什么问题?为什么我不能使用fun2制作On Mouse Entered事件?
答案 0 :(得分:2)
您使用了错误的导入。
替换
import java.awt.event.MouseEvent;
与
import javafx.scene.input.MouseEvent;