![](/img/trans.png)
[英]javafx.fxml.FXMLLoader.constructLoadException | fxml.LoadException
[英]Javafx/FXML: conflict between initialize() method and FXML Loader:Initialize: NullPointerException, FXML.LoadException
正如標題所述,構建表格並將所有內容添加到表格的 initialize 方法與應該為彈出窗口加載 FXML 的 FXMLLoader 之間存在一定的沖突。
我的代碼:
主要的:
import javafx.fxml.FXMLLoader;
import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
private TableView<Artikel> table;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage stage) throws Exception {
stage.setTitle("Table View Sample");
stage.setWidth(1250);
stage.setHeight(1000);
Parent root = FXMLLoader.load(getClass().getResource("fxml1.fxml"));
Scene scene1 = new Scene(root,300,300);
stage.setScene(scene1);
stage.show();
}
FXML 1.
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.event.ActionEvent?>
<?import javafx.geometry.Pos?>
<?import javafx.collections.FXCollections ?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.StackPane?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="150.0" prefWidth="200.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="Controller" stylesheets="stylesheet.css" spacing="4" fx:id="idScene" >
<TableView fx:id="idTable" >
</TableView>
<HBox alignment="TOP_RIGHT">
<Button fx:id="idNew" text ="Neu" onAction="#onNew"/>
</HBox>
</VBox>
控制器。
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TableView;
import javafx.scene.control.TableColumn;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;
public class Controller implements Initializable {
@FXML
private Button idNew;
@FXML
private TableView idTable;
public void onNew(ActionEvent event) throws IOException {
Parent popUpFenster = FXMLLoader.load(getClass().getResource("fxml2.fxml"));
Scene scene2 = new Scene(popUpFenster,500,500);
Stage stage = new Stage();
stage.setScene(scene2);
stage.initModality(Modality.APPLICATION_MODAL);
stage.showAndWait();
}
@Override
public void initialize(URL url, ResourceBundle rb) {
TableColumn place = new TableColumn("Platz");
TableColumn name = new TableColumn("Name");
TableColumn weight = new TableColumn("Gewicht");
TableColumn price = new TableColumn("Preis");
TableColumn amount = new TableColumn("Anzahl");
idTable.getColumns().addAll(place,name,weight,price,amount);
final ObservableList<Artikel> data = FXCollections.observableArrayList(
new Artikel(1,"Hallo Welt",4,5,3),
new Artikel(1,"Hallo Welt",5,3,4),
new Artikel(2,"Hallo Welt",4,3,1));
//Step : 3# Associate data with columns
place.setCellValueFactory(new PropertyValueFactory<Artikel,Integer>("Platz"));
name.setCellValueFactory(new PropertyValueFactory<Artikel,String>("Name"));
weight.setCellValueFactory(new PropertyValueFactory<Artikel,Integer>("Gewicht"));
price.setCellValueFactory(new PropertyValueFactory<Artikel,Integer>("Preis"));
amount.setCellValueFactory(new PropertyValueFactory<Artikel,Integer>("Anzahl"));
//Step 4: add data inside table
idTable.setItems(data);
}
public class Artikel {
private int Platz;
private String Name;
private int Gewicht;
private int Preis;
private int Anzahl;
public Artikel() {
this.Platz = 0;
this.Name = "Hallo Welt";
this.Gewicht= 0;
this.Preis = 0;
this.Anzahl = 0;
}
public Artikel(int Platz, String Name, int Gewicht, int Preis,int Anzahl) {
this.Platz = Platz;
this.Name = Name;
this.Gewicht = Gewicht;
this.Preis = Preis;
this.Anzahl = Anzahl;
}
public int getPlatz() {return this.Platz;};
public String getName () {return this.Name;}
public int getGewicht() {return this.Gewicht;};
public int getPreis() {return this.Preis;}
public int getAnzahl() { return this.Anzahl;}
}
}
fxml2:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.event.ActionEvent?>
<?import javafx.geometry.Pos?>
<?import javafx.collections.FXCollections ?>
<?import javafx.geometry.Insets?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="290.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="Controller" stylesheets="stylesheet.css" fx:id="idPopUp">
<HBox alignment="CENTER">
<Label text="Platz"/>
<TextField fx:id="idPlace" />
</HBox>
</VBox>
問題:如果您刪除 initialize 或將其注釋掉 - Neu- Button -PopUp - 工作,否則 - 顯示表格但未彈出按鈕,似乎存在沖突
在fxml2.fxml
你有: fx:controller="Controller"
分配的控制器通過以下方式調用fxml2.fxml
:
Parent popUpFenster = FXMLLoader.load(getClass().getResource("fxml2.fxml"));
所以fxml2
調用Controller
,然后Controller
調用fxml2
......
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.