我正在创建一个出价系统，其中一个场景包含可供拍卖的项目列表。当用户点击该项目时，场景应该更改为另一个锚定窗格，其中将显示与该项目相关的所有详细信息。当我点击该项目时，我得到了这个例外：
javafx.fxml.LoadException:
/C:/Users/Deepak95/IdeaProjects/Package2/out/production/Package2/System/view/ItemView.fxml:9
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2605)
at javafx.fxml.FXMLLoader.access$700(FXMLLoader.java:104)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:928)
at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:967)
at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:216)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:740)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2711)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2531)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2445)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2413)
at System.Main.showItem(Main.java:61)
at System.View.ItemOverviewController.lambda$initialize$2(ItemOverviewController.java:23)
at System.View.ItemOverviewController$$Lambda$154/21527645.changed(Unknown Source)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyObjectWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyObjectWrapper.java:176)
at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:142)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:112)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:146)
at javafx.scene.control.SelectionModel.setSelectedItem(SelectionModel.java:102)
at javafx.scene.control.MultipleSelectionModelBase.lambda$new$34(MultipleSelectionModelBase.java:67)
at javafx.scene.control.MultipleSelectionModelBase$$Lambda$135/26372034.invalidated(Unknown Source)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:137)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:176)
at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:142)
at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:113)
at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:147)
at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:68)
at javafx.scene.control.TableView$TableViewArrayListSelectionModel.updateSelectedIndex(TableView.java:2900)
at javafx.scene.control.TableView$TableViewArrayListSelectionModel.select(TableView.java:2430)
at javafx.scene.control.TableView$TableViewArrayListSelectionModel.clearAndSelect(TableView.java:2360)
at javafx.scene.control.TableView$TableViewSelectionModel.clearAndSelect(TableView.java:1898)
at com.sun.javafx.scene.control.behavior.TableCellBehaviorBase.simpleSelect(TableCellBehaviorBase.java:215)
at com.sun.javafx.scene.control.behavior.TableCellBehaviorBase.doSelect(TableCellBehaviorBase.java:148)
at com.sun.javafx.scene.control.behavior.CellBehaviorBase.mousePressed(CellBehaviorBase.java:150)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:95)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3758)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3486)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2495)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:350)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$350(GlassViewEventHandler.java:385)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$$Lambda$255/19643353.get(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:404)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:384)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:927)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$145(WinApplication.java:101)
at com.sun.glass.ui.win.WinApplication$$Lambda$38/10455932.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.InstantiationException: System.View.ItemViewController
at java.lang.Class.newInstance(Class.java:427)
at sun.reflect.misc.ReflectUtil.newInstance(ReflectUtil.java:51)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:923)
... 72 more
Caused by: java.lang.NoSuchMethodException: System.View.ItemViewController.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.newInstance(Class.java:412)
... 74 more
以下是负责场景变更的功能：
public void initRootLayout() {
try {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/RootLayout.fxml"));
rootLayout = (BorderPane) loader.load();
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void showItemOverview(){
try {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/ItemOverview.fxml"));
AnchorPane personOverview = (AnchorPane) loader.load();
rootLayout.setCenter(personOverview);
ItemOverviewController controller=loader.getController();
controller.setMain(this);
} catch (IOException e) {
e.printStackTrace();
}
}
public void showItem(Item I){
try {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/ItemView.fxml"));
AnchorPane itemview= (AnchorPane) loader.load();
rootLayout.setCenter(itemview);
ItemViewController controller=loader.getController();
controller.setMain(this);
}catch(IOException e){
e.printStackTrace();
}
}
以下是概述类及其对应的fxml文件：
package System.View;
import System.Main;
import System.Model.Item;
import javafx.fxml.FXML;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
public class ItemOverviewController {
@FXML
private TableView<Item> itemTableView;
@FXML
private TableColumn<Item,String> itemnamecolumn;
@FXML
private TableColumn<Item,Integer> basepricecolumn;
private Main main;
public ItemOverviewController(){
}
@FXML
private void initialize(){
itemnamecolumn.setCellValueFactory(celldata->celldata.getValue().itemnameProperty());
basepricecolumn.setCellValueFactory(celldata->celldata.getValue().initialpriceProperty().asObject());
itemTableView.getSelectionModel().selectedItemProperty().addListener((observable,oldvalue,newvalue)->main.showItem(newvalue));
}
public void setMain(Main main){
this.main=main;
itemTableView.setItems(main.getItemdata());
}
}
fxml文件：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="375.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1" fx:controller="System.View.ItemOverviewController">
<children>
<TableView fx:id="itemTableView" layoutX="200.0" layoutY="86.0" prefHeight="200.0" prefWidth="200.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columns>
<TableColumn fx:id="itemnamecolumn" prefWidth="310.0" text="Item Name" />
<TableColumn fx:id="basepricecolumn" prefWidth="289.0" text="BasePrice" />
</columns>
<columnResizePolicy>
<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
</columnResizePolicy>
</TableView>
</children>
</AnchorPane>
itemview控制器类及其fxml文件：
package System.View;
import System.Model.Item;
import javafx.fxml.FXML;
import javafx.scene.control.Label;
import System.Main;
public class ItemViewController {
Item I;
@FXML
Label itemname;
@FXML
Label description;
@FXML
Label biddername;
@FXML
Label baseprice;
@FXML
Label currentprice;
Main main;
public ItemViewController(Item I){
this.I=I;
}
public void initialize(){
itemname.setText(I.getItemname());
description.setText(I.getDescription());
biddername.setText(I.getBiddername());
baseprice.setText(I.getInitialprice().toString());
currentprice.setText(I.getInitialprice().toString());
}
public void setMain(Main main) {
this.main = main;
}
}
fxml 档案：
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1" fx:controller="System.View.ItemViewController">
<children>
<SplitPane dividerPositions="0.5" layoutX="159.0" layoutY="46.0" prefHeight="300.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<SplitPane dividerPositions="0.5" orientation="VERTICAL" prefHeight="298.0" prefWidth="296.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
<children>
<ImageView fitHeight="150.0" fitWidth="296.0" layoutX="-22.0" layoutY="-2.0" pickOnBounds="true" preserveRatio="true" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
<children>
<GridPane prefHeight="145.0" prefWidth="294.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label text="Base price:">
<font>
<Font size="20.0" />
</font>
</Label>
<Label text="Current Price:" GridPane.rowIndex="1">
<font>
<Font size="20.0" />
</font>
</Label>
<Label text="Bidder Name:" GridPane.rowIndex="2">
<font>
<Font size="20.0" />
</font>
</Label>
<Label fx:id="baseprice" text="Label" GridPane.columnIndex="1">
<font>
<Font size="20.0" />
</font>
</Label>
<Label fx:id="currentprice" text="Label" GridPane.columnIndex="1" GridPane.rowIndex="1">
<font>
<Font size="20.0" />
</font>
</Label>
<Label fx:id="biddername" text="Label" GridPane.columnIndex="1" GridPane.rowIndex="2">
<font>
<Font size="20.0" />
</font>
</Label>
</children>
</GridPane>
</children>
</AnchorPane>
</items>
</SplitPane>
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<Label layoutX="14.0" layoutY="14.0" text="Item Name:">
<font>
<Font size="20.0" />
</font>
</Label>
<Label fx:id="itemname" layoutX="134.0" layoutY="14.0" text="Label">
<font>
<Font size="20.0" />
</font>
</Label>
<Label fx:id="description" layoutX="14.0" layoutY="56.0" prefHeight="176.0" prefWidth="233.0" text="Label" />
<ButtonBar layoutX="81.0" layoutY="244.0" prefHeight="40.0" prefWidth="200.0">
<buttons>
<Button mnemonicParsing="false" text="Return" />
<Button mnemonicParsing="false" text="Bid" />
</buttons>
</ButtonBar>
</children></AnchorPane>
</items>
</SplitPane>
</children>
</AnchorPane>
提前感谢您的帮助：D
修改：按要求插入了包