应用程序启动方法中的JavaFx Gui异常
[英]JavaFx Gui Exception in Application start method
问题描述
I have basically only a not coded Gui, and still got that exception although had some working guis before with a little code. 
我基本上只有一个未编码的Gui，尽管之前有一些可以正常工作的gui，但仍然有一个例外，但有一点代码。 so what confuses most.. There's basically only a gui and there isnt much code to delete, fix.. so why this gui isn't showing up? 所以最让您感到困惑的是..基本上只有一个GUI，并且没有太多要删除，修复的代码..为什么不显示该GUI？ ps fxml is in the right directory, for sure ps fxml在正确的目录中
MAIN 主要
package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage stage) throws Exception {
AnchorPane pane = FXMLLoader.load(getClass().getResource("Gui.fxml"));
Scene scene = new Scene(pane);
stage.setScene(scene);
stage.show();
}
}
CONTROLLER CONTROLLER
public class Controller implements Initializable {
DropShadow ds = new DropShadow();
@FXML
ButtonGroup group;
@FXML
RadioButton radio1;
@FXML
RadioButton radio2;
@FXML
RadioButton radio3;
@FXML
Label changelog;
@FXML
TextArea changelogarea;
@FXML
Pane panechange;
@FXML
AnchorPane mainanchor;
Controller(){
changelog.setEffect(ds);
}
@Override
public void initialize(URL location, ResourceBundle resources) {
// TODO Auto-generated method stub
}
}
FXML FXML
<?import javafx.scene.text.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="mainanchor" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.Controller">
<children>
<Pane fx:id="panechange" layoutX="106.0" layoutY="-3.0" prefHeight="406.0" prefWidth="493.0">
<children>
<Label fx:id="changelog" layoutX="20.0" layoutY="21.0" prefHeight="49.0" prefWidth="463.0" text=" Change log" textAlignment="CENTER">
<font>
<Font size="27.0" />
</font>
</Label>
<TextArea fx:id="changelogarea" layoutX="1.0" layoutY="70.0" prefHeight="329.0" prefWidth="487.0" />
</children>
</Pane>
<RadioButton fx:id="radio2" layoutX="14.0" layoutY="62.0" mnemonicParsing="false" text="Valiuta">
<toggleGroup>
<ToggleGroup fx:id="group" />
</toggleGroup>
</RadioButton>
<RadioButton fx:id="radio3" layoutX="14.0" layoutY="94.0" mnemonicParsing="false" text="Atstumai" toggleGroup="$group" />
<RadioButton fx:id="radio1" layoutX="14.0" layoutY="32.0" mnemonicParsing="false" selected="true" text="Naujienos" toggleGroup="$group" />
</children>
</AnchorPane>
error 错误
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:483) at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherIm pl.java:363) at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java: 303) 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:483) at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767) Caused by: java.lang.RuntimeException: Exception in Application start method at com.sun.javafx.a
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2595) at javafx.fxml.FXMLLoader.access$700(FXMLLoader.java:104) at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:930) at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoade r.java:967) at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:216) at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:740) at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2701) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2521) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2435) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3208) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3169) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3142) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3118) at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3098) at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3091) at application.Main.start(M
1 个解决方案
解决方案1
0 已采纳 2015-02-02 14:55:32
There are two issues here: 这里有两个问题：
- The constructor of your controller has to be public. 控制器的构造函数必须是公共的。 See this thread for reference: JavaFX IllegalAccessException during FXML load() 请参阅此线程以供参考： FXML load（）期间的JavaFX IllegalAccessException
- The controller constructor will not work, since you are trying to access a field which is not available at that point. 控制器构造函数将无法工作，因为您正在尝试访问当时不可用的字段。
So for 2. move changelog.setEffect(ds); 所以对于2.移动changelog.setEffect(ds); from the controller to the initialize method. 从控制器到initialize方法。
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