Question

我遵循了教程并创建了自己的自定义元素。这是一个AnchorPane，其中包含6个重叠的画布以创建图形框架。
下面是itudesGraph.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.canvas.Canvas?>
<?import javafx.scene.layout.AnchorPane?>

<fx:root type="javafx.scene.layout.AnchorPane" minHeight="200.0" minWidth="700.0" prefHeight="300.0" prefWidth="900.0" xmlns="http://javafx.com/javafx/9" xmlns:fx="http://javafx.com/fxml/1">  
   <children>
      <Canvas fx:id="backgroundCanvas" height="300.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
      <Canvas fx:id="series1Canvas" height="300.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
      <Canvas fx:id="series2Canvas" height="300.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
      <Canvas fx:id="series3Canvas" height="300.0" layoutX="7.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
      <Canvas fx:id="series4Canvas" height="300.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
      <Canvas fx:id="savedSeriesCanvas" height="300.0" layoutY="-1.0" width="900.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
   </children>
</fx:root>

相当简单。然后，我有一个加载此框架的自定义控制器，称为幅值图形控制器

public class magnitudeGraphController extends AnchorPane implements Initializable  {
@FXML 
public Canvas backgroundCanvas;

@FXML
public Canvas series1Canvas;

@FXML
public Canvas series2Canvas;

@FXML
public Canvas series3Canvas;

@FXML
public Canvas series4Canvas;

@FXML
public Canvas savedSeriesCanvas;

public magnitudeGraphController(){
    System.out.println("Graph Initialised");
    FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("magnitudeGraph.fxml"));
    fxmlLoader.setRoot(this);
    fxmlLoader.setController(this);

    try {

        fxmlLoader.load();
    } catch (IOException exception) {
        throw new RuntimeException(exception);
    }

又好又容易。因此，在我的主应用程序控制器上，我可以调用一个graphs实例，控制器将加载fxml文件，其根元素为anchorPane。

这在主应用程序中通过以下方法调用：

public magnitudeGraphController spectrumgraph = new magnitudeGraphController();

现在，为我的主应用程序编写fxml时会遇到困难。我为控制器编写了导入文件：

<?import myApp.magnitudeGraphController?>  

<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
    <children>
         <magnitudeGraphController fx:id="spectrumgraph" layoutX="38.0" layoutY="33.0" minHeight="200.0" minWidth="700.0" prefHeight="300.0" prefWidth="944.0">  

</AnchorPane>

我得到的是fxml编辑器上的错误，指出“ Class javafx.scene.layout.AnchorPane”不支持属性MagnitudeGraphController。

让我感到困惑的是，它运行得很好。我所做的只是将fxml文件和控制器的名称更改为一个更可识别的名称，并重构了该文件以反映这一点。我已经查看了备份备份的工作时间，除了文件名之外，找不到任何区别。如果尝试编译该错误，则在尝试加载幅值GraphController时会抛出classnotfoundexception。我已经把头发扯了好多年了，无法找到使整个事情崩溃的原因。

自定义FXML组件未加载-classnotfoundexception

0 个答案: