Fxml 没有看到 onAction
Fxml doesn't see onAction
我在使用 JavaFX 时遇到一些问题。它不起作用。我有这样的错误。
"C:\Program Files\Java\jdk1.8.0_161\bin\java" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.4\lib\idea_rt.jar=51165:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.4\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_161\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\rt.jar;C:\Users\kubci\IdeaProjects\FinallyProject\out\production\FinallyProject;C:\Users\kubci\IdeaProjects\FinallyProject\mysql-connector-java-5.1.6.jar" LoginPanel
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$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication4(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:748)
Caused by: javafx.fxml.LoadException: fx:controller can only be applied to root element.
/C:/Users/kubci/IdeaProjects/FinallyProject/out/production/FinallyProject/stackPanel.fxml:24
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access0(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:909)
at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at LoginPanel.start(LoginPanel.java:28)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication11(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait4(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null2(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater3(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null7(WinApplication.java:177)
... 1 more
Exception running application LoginPanel
我给你我的 Java 和 Fxml 代码。我需要帮助 。我只是研究 Javafx，我不知道该怎么做。
Java
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import java.io.IOException;
public class LoginPanel extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(this.getClass().getResource("stackPanel.fxml"));
TextField loginPanel;
FlowPane flowPane = loader.load();
Scene scene = new Scene(flowPane);
primaryStage.setScene(scene);
primaryStage.setTitle("Logowanie");
primaryStage.setWidth(500);
primaryStage.setHeight(500);
primaryStage.setResizable(false);
primaryStage.show();
}
}
和
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import java.io.IOException;
public class ControlPanel {
@FXML
Button button;
@FXML
public void show(){
System.out.println("Work");
}
}
Fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.StackPane?>
<!--<FlowPane xmlns:fx="http://javafx.com/fxml/1" >-->
<!--<children>-->
<!--<Label text="Login"/>-->
<!--<TextField fx:id="loginTextField"/>-->
<!--<Label text="Hasło"/>-->
<!--<PasswordField fx:id="passwordField"/>-->
<!--<Button fx:id="loginButton" text="Zaloguj"></Button>-->
<!--<Button fx:id="b1" text="Gabrys ma "/>-->
<!--</children>-->
<!--</FlowPane>-->
<?import javafx.scene.layout.FlowPane?>
<FlowPane prefHeight="334.0" prefWidth="445.0" xmlns:fx="http://javafx.com/fxml/1" >
<children >
<TextField fx:id="loginPanel" alignment="BOTTOM_LEFT" text="Login" />
<Button fx:id="button" text="Logowanie" fx:controller="ControlPanel" onAction="#show"/>
</children>
</FlowPane>
当您使用 FXMLLoader 加载 FXML 文件时，如果 FXMLLoader 找到 fx:controller 标签，FXMLLoader 将创建一个控制器实例 class。从逻辑上讲，这必须位于 XML 文件中的第一个元素上。
无论您在 <Button fx:id="button" text="Logowanie" fx:controller="ControlPanel" onAction="#show"/> 上如何定义它。
将 fx:controller 移动到根 FlowPane 标签。
<FlowPane fx:controller="ControlPanel" prefHeight="334.0" prefWidth="445.0" xmlns:fx="http://javafx.com/fxml/1" >
我在使用 JavaFX 时遇到一些问题。它不起作用。我有这样的错误。
"C:\Program Files\Java\jdk1.8.0_161\bin\java" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.4\lib\idea_rt.jar=51165:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.3.4\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_161\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_161\jre\lib\rt.jar;C:\Users\kubci\IdeaProjects\FinallyProject\out\production\FinallyProject;C:\Users\kubci\IdeaProjects\FinallyProject\mysql-connector-java-5.1.6.jar" LoginPanel
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$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication4(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:748)
Caused by: javafx.fxml.LoadException: fx:controller can only be applied to root element.
/C:/Users/kubci/IdeaProjects/FinallyProject/out/production/FinallyProject/stackPanel.fxml:24
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
at javafx.fxml.FXMLLoader.access0(FXMLLoader.java:103)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:909)
at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at LoginPanel.start(LoginPanel.java:28)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication11(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait4(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null2(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater3(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null7(WinApplication.java:177)
... 1 more
Exception running application LoginPanel
我给你我的 Java 和 Fxml 代码。我需要帮助 。我只是研究 Javafx，我不知道该怎么做。
Java
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import java.io.IOException;
public class LoginPanel extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(this.getClass().getResource("stackPanel.fxml"));
TextField loginPanel;
FlowPane flowPane = loader.load();
Scene scene = new Scene(flowPane);
primaryStage.setScene(scene);
primaryStage.setTitle("Logowanie");
primaryStage.setWidth(500);
primaryStage.setHeight(500);
primaryStage.setResizable(false);
primaryStage.show();
}
}
和
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import java.io.IOException;
public class ControlPanel {
@FXML
Button button;
@FXML
public void show(){
System.out.println("Work");
}
}
Fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.StackPane?>
<!--<FlowPane xmlns:fx="http://javafx.com/fxml/1" >-->
<!--<children>-->
<!--<Label text="Login"/>-->
<!--<TextField fx:id="loginTextField"/>-->
<!--<Label text="Hasło"/>-->
<!--<PasswordField fx:id="passwordField"/>-->
<!--<Button fx:id="loginButton" text="Zaloguj"></Button>-->
<!--<Button fx:id="b1" text="Gabrys ma "/>-->
<!--</children>-->
<!--</FlowPane>-->
<?import javafx.scene.layout.FlowPane?>
<FlowPane prefHeight="334.0" prefWidth="445.0" xmlns:fx="http://javafx.com/fxml/1" >
<children >
<TextField fx:id="loginPanel" alignment="BOTTOM_LEFT" text="Login" />
<Button fx:id="button" text="Logowanie" fx:controller="ControlPanel" onAction="#show"/>
</children>
</FlowPane>
当您使用 FXMLLoader 加载 FXML 文件时，如果 FXMLLoader 找到 fx:controller 标签，FXMLLoader 将创建一个控制器实例 class。从逻辑上讲，这必须位于 XML 文件中的第一个元素上。
无论您在 <Button fx:id="button" text="Logowanie" fx:controller="ControlPanel" onAction="#show"/> 上如何定义它。
将 fx:controller 移动到根 FlowPane 标签。
<FlowPane fx:controller="ControlPanel" prefHeight="334.0" prefWidth="445.0" xmlns:fx="http://javafx.com/fxml/1" >