Javafx GUI没有显示
[英]Javafx GUI doesn't show up
问题描述
Hello I'm a new learner of javaFx fxml and i'm testing table view with fxml.But netbeans show no error in my code and i can't run my GUI application. 
您好，我是javaFx fxml的新手，正在用fxml测试表视图。但是netbeans在我的代码中没有显示错误，并且我无法运行GUI应用程序。
My code of FXMLDocument.fxml is here. 我的FXMLDocument.fxml代码在这里。
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="359.0" prefWidth="473.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="table.FXMLDocumentController">
<children>
<Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
<TableView fx:id="tableview" layoutX="137.0" layoutY="90.0" prefHeight="200.0" prefWidth="200.0">
<columns>
<TableColumn fx:id="id" prefWidth="93.0" text="Id" />
<TableColumn fx:id="name" prefWidth="106.0" text="Name" />
</columns>
</TableView>
</children>
</AnchorPane>
And this is a fxml controller code. 这是一个fxml控制器代码。
package table;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.*;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
/**
*
* @author pyaephyohlaing
*/
public class FXMLDocumentController implements Initializable {
//the table's view and columns
@FXML
TableView<Person>tableview;
@FXML
TableColumn id;
@FXML
TableColumn name;
//the table data
ObservableList<Person>data = FXCollections.observableArrayList();
@Override
public void initialize(URL url, ResourceBundle rb) {
//setup the table data
id.setCellValueFactory(
new PropertyValueFactory<Person,Integer>("id")
);
name.setCellFactory(
new PropertyValueFactory<Person,String>("name")
);
data.add(new Person(1,"Mg Mg"));
tableview.setItems(data);
System.out.println("hello");
}
}
Here is Person class code. 这是Person类代码。 (Person.java) （Person.java）
package table;
import javafx.beans.property.*;
// a class that represents the person data to add into the table view
public class Person {
//a variable that represent the column data neeed to be JavaFx properties(i.e SimpleStringProperty)
//sets as the JavaFx table data property
public SimpleIntegerProperty id;
public SimpleStringProperty name;
public Person(Integer id,String name) {
System.out.println("Hee");
this.id=new SimpleIntegerProperty(id);
this.name=new SimpleStringProperty(name);
}
//getter method
public Integer getId() {
return id.get();
}
public String getName() {
return name.get();
}
}
This is the main Table.java code. 这是主要的Table.java代码。
package table;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
/**
*
* @author pyaephyohlaing
*/
public class Table extends Application {
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
And when i run my project,GUI is not appeared and it shows many errors like that. 当我运行我的项目时，GUI没有出现，并且显示了很多类似的错误。
Executing /Users/pyaephyohlaing/NetBeansProjects/table/dist/run1649041788/table.jar using platform /Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home/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.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) 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:4
I have no idea what's wrong with my code and can anyone help me to fix the error? 我不知道我的代码有什么问题，有人可以帮助我修复错误吗？ Thanks. 谢谢。
1 个解决方案
解决方案1
1 2015-11-28 10:27:55
In the FXMLDocumentController you set the cell factory for Id when I think you meant to set the cellValueFactory for name. 在FXMLDocumentController中，当我认为要为名称设置cellValueFactory时，可以为Id设置单元格工厂。
Change: 更改：
id.setCellFactory(
new PropertyValueFactory<Person,String>("name")
);
To: 至：
name.setCellValueFactory(
new PropertyValueFactory<Person,String>("name")
);
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