表格单元格在我的tableview中是空的。 JavaFX + Scenebuilder [英] The table cells are empty in my tableview. JavaFX + Scenebuilder
问题描述
我正在尝试让表格单元格在我创建新行时显示字符串。但是所有的行都是空的。谁知道我做错了什么？
这是主要的类：
包应用程序;
I am trying to get the table cells to show the string when i create new rows. But all the rows are just empty. Do anyone know what i am doing wrong? Here is the main class: package application;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Cursor;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("/fxml/BasketCase_GUI_0.3.fxml"));
Scene scene = new Scene(root,1110,740);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setResizable(false);
primaryStage.setScene(scene);
primaryStage.setTitle("Basket Case_Beta");
primaryStage.show();
scene.setCursor(Cursor.DEFAULT);
}
public static void main(String[] args) throws Exception {
launch(args);
}
}
这是正常的，正在工作所以我不要以为你需要担心那个。
This is normal and working so i dont think you need to worry about that one.
这是控制器类。我认为问题可能在哪里。
Here is the controller class. Where I think the problem might be.
package application;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
public class MainController implements Initializable {
@FXML
TableView<Table> TableID;
@FXML
TableColumn<Table, Integer> aPlayerID;
@FXML
TableColumn<Table, String> aLeague;
@FXML
TableColumn<Table, String> aName;
private int aNumber = 1;
SimpleStringProperty str = new SimpleStringProperty();
public MainController() {
str.set("Hello");
}
final ObservableList<Table> data = FXCollections.observableArrayList(
new Table(aNumber++, "hehe", "hoho"),
new Table(aNumber++, "hehe", "hoho"),
new Table(aNumber++, "hehe", "hoho")
);
public void buttonClick(ActionEvent event) {
data.add(new Table(aNumber++, "hehe", "hoho"));
TableID.getColumns().addAll(aPlayerID, aLeague, aName);
}
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
aPlayerID.setCellValueFactory( new PropertyValueFactory<Table, Integer>("bPlayerID"));
aLeague.setCellValueFactory( new PropertyValueFactory<Table, String>("bLeague"));
aName.setCellValueFactory( new PropertyValueFactory<Table, String>("bName"));
TableID.setItems(data);
}
}
这里是tableviewer所需的表类
And here is also the table class thats needed for the tableviewer
package application;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class Table {
private final SimpleIntegerProperty bPlayerID;
private final SimpleStringProperty bLeague;
private final SimpleStringProperty bName;
public Table(int cPlayerID, String cLeague, String cName) {
this.bPlayerID = new SimpleIntegerProperty(cPlayerID);
this.bLeague = new SimpleStringProperty(cLeague);
this.bName = new SimpleStringProperty(cName);
}
public int getbPlayerID() {
return bPlayerID.get();
}
public void setbPlayerID(int v) {
bPlayerID.set(v);
}
public String getbLeague() {
return bLeague.get();
}
public void setbLeague(String v) {
bLeague.set(v);
}
public String getbName() {
return bName.get();
}
public void setbName(String v) {
bName.set(v);
}
}
你们知道可能出现什么问题或建议我怎么能只添加tableviewer的代码仍然可以使用来自scenebuilder的fxml文件的其余部分？
Do you guys know what could be wrong or maybe suggest how I could add just the tableviewer with code that still works with the rest of the fxml file from the scenebuilder?
推荐答案
这些名字你的 GET 的方法是错误的。根据 PropertyValueFactory 文档，如果传入属性名称xyz，属性值factory将首先查找方法 xyzProperty（）属于表行中的对象。如果没有找到，那么它将重新寻找一个名为 getXyz（）的方法（仔细查看那里的大写），将结果包装在 ReadOnlyObjectWrapper 。
The names of your get methods are wrong. According to the PropertyValueFactory documentation, if you pass in a property name of "xyz", the property value factory will first look for a method xyzProperty() belonging to the object in the table row. If it doesn't find that, it will fall back on looking for a method called getXyz() (carefully look at the capitalization there), wrapping the result in a ReadOnlyObjectWrapper.
所以以下方法可行：
package application;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class Table {
private final SimpleIntegerProperty bPlayerID;
private final SimpleStringProperty bLeague;
private final SimpleStringProperty bName;
public Table(int cPlayerID, String cLeague, String cName) {
this.bPlayerID = new SimpleIntegerProperty(cPlayerID);
this.bLeague = new SimpleStringProperty(cLeague);
this.bName = new SimpleStringProperty(cName);
}
public int getBPlayerID() {
return bPlayerID.get();
}
public void setBPlayerID(int v) {
bPlayerID.set(v);
}
public String getBLeague() {
return bLeague.get();
}
public void setBLeague(String v) {
bLeague.set(v);
}
public String getBName() {
return bName.get();
}
public void setBName(String v) {
bName.set(v);
}
}
但是，如
However, as stated in the PropertyValueFactory documentation, the properties in this case would not be "live": in other words if the values change, the table will not automatically update. Additionally, if you wanted to make the table editable, it wouldn't update the properties without some explicit wiring to call the set methods.
最好定义你的表格模型使用属性和绑定教程中的大纲：
It's better to define your table model using the outline in the Properties and Bindings tutorial:
package application;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
public class Table {
private final IntegerProperty bPlayerID;
private final StringProperty bLeague;
private final StringProperty bName;
public Table(int cPlayerID, String cLeague, String cName) {
this.bPlayerID = new SimpleIntegerProperty(cPlayerID);
this.bLeague = new SimpleStringProperty(cLeague);
this.bName = new SimpleStringProperty(cName);
}
public int getBPlayerID() {
return bPlayerID.get();
}
public void setBPlayerID(int v) {
bPlayerID.set(v);
}
public IntegerProperty bPlayerIDProperty() {
return bPlayerID ;
}
public String getBLeague() {
return bLeague.get();
}
public void setBLeague(String v) {
bLeague.set(v);
}
public StringProperty bLeagueProperty() {
return bLeague ;
}
public String getBName() {
return bName.get();
}
public void setBName(String v) {
bName.set(v);
}
public StringProperty bNameProperty() {
return bName ;
}
}
如果你这样做，那么（在Java 8中）您可以使用以下单元格值工厂，而不是 PropertyValueFactory ：
If you do that, then (in Java 8) you can use the following cell value factories, instead of the PropertyValueFactory:
aPlayerID.setCellValueFactory(cellData -> cellData.getValue().bPlayerIDProperty());
这将允许编译器捕获任何错误，而不是仅仅在运行时静默失败。
which will allow the compiler to catch any errors, instead of it just failing silently at runtime.
这篇关于表格单元格在我的tableview中是空的。 JavaFX + Scenebuilder的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
