我又遇到了问题。
我试图了解FXML，目前正在使用oracle的“精通FXML”指南“使用FXML创建通讯录”。
我在指南的结尾处非常接近，但是我无法解决自昨天以来遇到的问题。
我想为我的父亲写一个维护程序，但是我总是收到这样的声明：
javafx.fxml.LoadException: Maintenance is not a valid type.
我猜有3个班级对于这个问题很重要。那就是我的“ mainLayout.fxml”，“ FXMLDocumentController.java”和“ Maintenance.java”
所以我只是按此顺序发布
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.ScrollPane?>
<?import javafx.scene.control.SplitPane?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.cell.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>
<?import javafx.collections.*?>
<Pane fx:controller="FXMLDocumentController" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="858.0" prefWidth="1276.0" xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1">
<children>
<SplitPane dividerPositions="0.8687747035573122" layoutX="2.0" layoutY="25.0" prefHeight="839.0" prefWidth="1276.0">
<items>
<AnchorPane fx:id="anchorpaneLeft" minHeight="0.0" minWidth="0.0" prefHeight="811.0" prefWidth="1104.0">
<children>
<ScrollPane id="scrollpane" fx:id="scrollpane" layoutX="452.0" layoutY="319.0" prefHeight="200.0" prefWidth="200.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<content>
<TableView id="tableView" fx:id="tableView" prefHeight="834.0" prefWidth="1102.0">
<columns>
<TableColumn text="%tablecolumnName" >
<cellValueFactory><PropertyValueFactory property = "name"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnAddress" >
<cellValueFactory><PropertyValueFactory property = "address"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnNumber" >
<cellValueFactory><PropertyValueFactory property = "number"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnMail" >
<cellValueFactory><PropertyValueFactory property = "mail"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnLast" >
<cellValueFactory><PropertyValueFactory property = "last"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnNext" >
<cellValueFactory><PropertyValueFactory property = "next"/>
</cellValueFactory>
</TableColumn>
<TableColumn text="%tablecolumnNote" >
<cellValueFactory><PropertyValueFactory property = "note"/>
</cellValueFactory>
</TableColumn>
</columns>
<items>
<FXCollections fx:factory="observableArrayList">
<Maintenance name="jacob" address="fichtestraße 5" number="01515242" mail="jacob@jacob.com" last="10.10.2018" next="10.10.2019" note="leer jung"/>
</FXCollections>
</items>
</TableView>
</content>
</ScrollPane>
</children>
</AnchorPane>
<AnchorPane fx:id="anchorpaneRight" minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<VBox fx:id="vboxNew" alignment="TOP_CENTER" layoutX="50.0" layoutY="52.0" prefHeight="85.0" prefWidth="164.0" spacing="15.0" AnchorPane.bottomAnchor="726.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="26.0">
<children>
<Label fx:id="labelNew" prefHeight="17.0" prefWidth="192.0" text="%labelNew">
<font>
<Font name="System Bold" size="12.0" />
</font>
</Label>
<Button fx:id="buttonInsert" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonInsert" onAction="#handleInsertButton" textAlignment="CENTER" />
</children>
</VBox>
<VBox fx:id="vboxEdit" alignment="TOP_CENTER" layoutY="120.0" prefHeight="717.0" prefWidth="164.0" spacing="15.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="120.0">
<children>
<Label fx:id="labelEdit" prefHeight="17.0" prefWidth="166.0" text="%labelEdit">
<font>
<Font name="System Bold" size="12.0" />
</font>
</Label>
<Button fx:id="buttonEdit" alignment="CENTER" contentDisplay="CENTER" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonEdit" textAlignment="CENTER" />
<Button fx:id="buttonDelete" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonDelete" />
<Button fx:id="buttonWeek" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonWeek" />
<Button fx:id="buttonMonth" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonMonth" />
<Button fx:id="buttonYear" alignment="CENTER" contentDisplay="CENTER" mnemonicParsing="false" prefHeight="25.0" prefWidth="100.0" text="%buttonYear" />
</children>
</VBox>
</children>
</AnchorPane>
</items>
</SplitPane>
<MenuBar fx:id="menubar" layoutX="2.0" layoutY="2.0" prefHeight="25.0" prefWidth="1276.0">
<menus>
<Menu fx:id="menuFile" mnemonicParsing="false" text="%menuFile">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu fx:id="menuEdit" mnemonicParsing="false" text="%menuEdit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu fx:id="menuHelp" mnemonicParsing="false" text="%menuHelp">
<items>
<MenuItem fx:id="itemAbout" mnemonicParsing="false" text="%itemAbout" />
</items>
</Menu>
<Menu fx:id="menuLanguage" mnemonicParsing="false" text="%menuLanguage">
<items>
<MenuItem fx:id="itemGer" mnemonicParsing="false" text="%itemGer" />
<MenuItem fx:id="itemEng" mnemonicParsing="false" text="%itemEng" />
</items>
</Menu>
</menus>
</MenuBar>
</children>
</Pane>
FXMLDocumentController.java：
import java.net.URL;
import java.util.*;
import javafx.collections.*;
import javafx.event.*;
import javafx.fxml.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.stage.*;
public class FXMLDocumentController implements Initializable {
@FXML private Label label;
@FXML private TableView<Maintenance> table;
@FXML private TableColumn tablecolumnName;
@FXML private TableColumn tablecolumnAddress;
@FXML private TableColumn tablecolumnNumber;
@FXML private TableColumn tablecolumnMail;
@FXML private TableColumn tablecolumnLast;
@FXML private TableColumn tablecolumnNext;
@FXML private TableColumn tablecolumnNote;
@FXML private Button buttonInsert;
@FXML private Button buttonEdit;
@FXML private Button buttonDelete;
@FXML private Button buttonWeek;
@FXML private Button buttonMonth;
@FXML private Button buttonYear;
@FXML private TextField textfieldName;
@FXML private TextField textfieldAddress;
@FXML private TextField textfieldMail;
@FXML private TextField textfieldNumber;
@FXML private TextField textfieldLast;
@FXML private TextField textfieldNext;
@FXML private TextField textfieldNote;
@FXML private TableView<Maintenance> tableView;
@FXML
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
label.setText("Hello World!");
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
@FXML
void handleInsertButton(ActionEvent event){
try {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("insertWindow.fxml"));
Parent root1 = (Parent) fxmlLoader.load();
Stage stage = new Stage();
stage.setTitle("Insert Window");
Scene scene = new Scene (root1);
stage.setScene(scene);
stage.show();
} catch(Exception e){
e.printStackTrace();
}
}
protected void handleEditButton() {
}
protected void handleDeleteButton() {
}
protected void handleWeekButton() {
}
protected void handleMonthButton() {
}
protected void handleYearButton() {
}
protected void handleGerButton() {
}
protected void handleEngButton() {
}
@FXML
protected void addMaintenance(ActionEvent event){
ObservableList <Maintenance> data = tableView.getItems();
data.add(new Maintenance(textfieldName.getText(), textfieldAddress.getText(),
textfieldMail.getText(), textfieldNumber.getText(),
textfieldLast.getText(), textfieldNext.getText(),
textfieldNote.getText()));
textfieldName.setText("");
textfieldAddress.setText("");
textfieldMail.setText("");
textfieldNumber.setText("");
textfieldLast.setText("");
textfieldNext.setText("");
textfieldNote.setText("");
}
}
最后是Maintenance.java
import javafx.beans.property.SimpleStringProperty;
public class Maintenance {
private final SimpleStringProperty name = new SimpleStringProperty("");
private final SimpleStringProperty address = new SimpleStringProperty("");
private final SimpleStringProperty number = new SimpleStringProperty("");
private final SimpleStringProperty mail = new SimpleStringProperty("");
private final SimpleStringProperty last = new SimpleStringProperty("");
private final SimpleStringProperty next = new SimpleStringProperty("");
private final SimpleStringProperty note = new SimpleStringProperty("");
public Maintenance(){
this("", "", "", "", "", "", "");
}
public Maintenance(String name, String address, String number, String mail, String last, String next, String note){
setName(name);
setAddress(address);
setNumber(number);
setMail(mail);
setLast(last);
setNext(next);
setNote(note);
}
public String getName() {
return name.get();
}
public String getAddress() {
return address.get();
}
public String getNumber() {
return number.get();
}
public String getMail() {
return mail.get();
}
public String getLast() {
return last.get();
}
public String getNext() {
return next.get();
}
public String getNote() {
return note.get();
}
public final void setName(String Name){
name.set(Name);
}
public final void setAddress(String Address){
address.set(Address);
}
public final void setNumber(String Number){
number.set(Number);
}
public final void setMail(String Mail){
mail.set(Mail);
}
public final void setLast(String Last){
last.set(Last);
}
public final void setNext(String Next){
next.set(Next);
}
public final void setNote(String Note){
note.set(Note);
}
}
insertwindow.fxml已经存在并且到目前为止运行良好，因此我不会过分缩短它对main.java和4个属性文件的发布。 希望有人能告诉我我又做错了什么。 感谢您的帮助！
Executing C:\Users\Schurke\Documents\NetBeansProjects\Maintenance\dist\run365389303\Maintenance.jar using platform D:\Program Files\Java\jdk1.8.0_202\jre/bin/java
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.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$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$159(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:748)
Caused by: javafx.fxml.LoadException:
file:/C:/Users/Schurke/Documents/NetBeansProjects/Maintenance/dist/run365389303/Maintenance.jar!/mainLayout.fxml
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2848)
at javafx.fxml.FXMLLoader.processImport(FXMLLoader.java:2692)
at javafx.fxml.FXMLLoader.processProcessingInstruction(FXMLLoader.java:2661)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2517)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3116)
at Main.start(Main.java:19)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$166(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$179(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$177(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$178(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$152(WinApplication.java:177)
... 1 more
Caused by: java.lang.ClassNotFoundException
at javafx.fxml.FXMLLoader.loadType(FXMLLoader.java:2899)
at javafx.fxml.FXMLLoader.importClass(FXMLLoader.java:2846)
... 19 more
Exception running application Main
Java Result: 1
答案 0 :(得分：0)
对于自定义FXML类型，您应该添加导入语句：
<!DOCTYPE html>
<html>
<head>
<style>
.no-js {
/* "no script" styles here */
}
</style>
</head>
<body class="no-js">
<script>
document.querySelector('body').classList.remove('no-js');
</script>
</body>
</html>
通常，使用默认软件包是一种不好的做法。将Maintenance.java放入某个包中，并将其导入为：
<?import Maintenance?>