javafx - 尽管已链接，但 Anchor Pane 仍为空
问题描述
我正在开发一个 JavaFX 应用程序，我按下一个按钮，一个新的 FXML 将加载到我的 AnchorPane 上。
我已经尝试遵循这两个教程（[Link1][1]）（[Link2][2]），但我无法让它工作。
一般来说，我对 GenuineCoder 的教程没有任何问题，但这次完全不同。我知道如果你运行 initialize() 方法，所有标有@FXML 注解的组件都会被加载。就是这样。所有组件都已加载，并且除了 AnchorPane 之外它们都可以工作。
我已经确定了几个 fx:id 在 Controller 和 .fxml 文件中是相同的。那么，为什么我得到一个 NullPointer？
无论如何，这是我的代码：
控制器类
public class AdministracionController implements Initializable{
@FXML
private ImageView butLogout;
@FXML
private JFXDrawer sidebarBox;
@FXML
private JFXHamburger hamburger;
@FXML
public AnchorPane rootPane;
private boolean isOpened;
private int transitionRate=1;
private HamburgerBasicCloseTransition transition;
@FXML
public void barSwitch() throws IOException{
VBox box = FXMLLoader.load(getClass().getResource("/grd/pfc/menu/admon/admonToolbar.fxml"));
sidebarBox.setSidePane(box);
sidebarBox.setMinWidth(0);
if(transition==null){
transition = new HamburgerBasicCloseTransition(hamburger);
}
transition.setRate(transitionRate);
transition.play();
if(isOpened){
sidebarBox.setMinWidth(0);
sidebarBox.close();
}else{
sidebarBox.setMinWidth(150);
sidebarBox.open();
}
isOpened=!isOpened;
transitionRate*=-1;
}
@FXML
public void logout(){
System.out.println("Sesión cerrada");
}
//This is the method where I try to load my FXML into my AnchorPane
public void addEmpleado() throws IOException {
AnchorPane pane = FXMLLoader.load(getClass().getResource("/grd/pfc/menu/admon/addEmpleado.fxml"));
rootPane.getChildren().setAll(pane);
}
public void addPerfil() {
}
public void editEmpleado() {
}
public void editPerfil() {
}
public void genRep() {
}
public void viewGraph() {
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
主要FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import com.jfoenix.controls.JFXDrawer?>
<?import com.jfoenix.controls.JFXHamburger?>
<?import javafx.scene.control.Separator?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<?import javafx.scene.text.Text?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="550.0" prefWidth="900.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="grd.pfc.admon.AdministracionController">
<children>
<ImageView fx:id="butLogout" fitHeight="55.0" fitWidth="65.0" layoutX="828.0" layoutY="485.0" onMouseClicked="#logout" pickOnBounds="true" preserveRatio="true">
<image>
<Image url="@../../multimedia/Logout.png" />
</image>
</ImageView>
<Text fill="#4059a9" layoutX="263.0" layoutY="57.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Administración">
<font>
<Font name="Arial Bold" size="48.0" />
</font>
</Text>
<Separator layoutY="66.0" prefHeight="23.0" prefWidth="900.0" />
<JFXDrawer fx:id="sidebarBox" defaultDrawerSize="150.0" layoutY="77.0" prefHeight="473.0" prefWidth="150.0" />
<JFXHamburger fx:id="hamburger" layoutX="14.0" layoutY="40.0" onMouseClicked="#barSwitch" styleClass="jfx-hamburger" stylesheets="@admon.css" />
<AnchorPane fx:id="rootPane" layoutX="150.0" layoutY="84.0" prefHeight="399.0" prefWidth="744.0" />
</children>
</AnchorPane>
要加载的 FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import com.jfoenix.controls.JFXComboBox?>
<?import com.jfoenix.controls.JFXPasswordField?>
<?import com.jfoenix.controls.JFXTextField?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Separator?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<?import javafx.scene.text.Text?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="406.0" prefWidth="751.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
<children>
<Text fill="#4059a9" layoutX="227.0" layoutY="47.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Añadir Empleado">
<font>
<Font name="Arial Bold" size="36.0" />
</font>
</Text>
<VBox layoutX="125.0" layoutY="60.0" prefHeight="310.0" prefWidth="231.0">
<children>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Nombre" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0" VBox.vgrow="ALWAYS">
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXTextField>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Fecha contratación" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0">
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXTextField>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Salario" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0" />
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Usuario" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0" />
</children>
</VBox>
<VBox layoutX="395.0" layoutY="60.0" prefHeight="310.0" prefWidth="231.0">
<children>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Apellidos" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0">
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXTextField>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Fecha Fin Contrato" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXTextField prefHeight="35.0" prefWidth="231.0">
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXTextField>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Tipo Contrato" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXComboBox prefHeight="25.0" prefWidth="234.0">
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXComboBox>
<Text fill="#4059a9" strokeType="OUTSIDE" strokeWidth="0.0" text="Contraseña" textAlignment="CENTER" wrappingWidth="230.05078125">
<font>
<Font name="Arial Bold" size="24.0" />
</font>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</Text>
<JFXPasswordField>
<VBox.margin>
<Insets top="10.0" />
</VBox.margin>
</JFXPasswordField>
</children>
</VBox>
<Separator layoutY="54.0" prefHeight="5.0" prefWidth="751.0" />
</children>
</AnchorPane>
给您带来不便深表歉意，非常感谢！[1]：https ://www.youtube.com/watch?v=RJOza3XQk34 [2]：https ://www.youtube.com/watch?v=ttD35jEo-f0
解决方案
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