我正在忙於編寫教程,並被困在一點上。JavaFx - 如何在TableView中顯示SimpleStringProperty值
基本上在表視圖中啓動新場景並從ObservableList類型Person中顯示值。
person類由3個SimpleStringProperty的firsName,lastName和email組成。
但是,當我運行應用程序似乎顯示錶中的SimpleStringProperty [StringProperty [value:actualvalue]]的值,而不是SimpleStringProperty的值。如果我將Person的類getFirstName方法更改爲返回String firstName.get(),則它會在表中正確顯示值。
我應該使用SimpleStringProperty還是像String這樣的普通對象?
Person類
package co.za.chrispie.addressBook;
import javafx.beans.property.SimpleStringProperty;
public class Person {
private SimpleStringProperty firstName;
private SimpleStringProperty lastName;
private SimpleStringProperty email;
public Person(final String firstName, final String lastName, final String email) {
this.firstName = new SimpleStringProperty(firstName);
this.lastName = new SimpleStringProperty(lastName);
this.email = new SimpleStringProperty(email);
}
public String getFirstName() {
return firstName.get(); //Changes this method to return a String
}
public SimpleStringProperty getLastName() {
return lastName;
}
public SimpleStringProperty getEmail() {
return email;
}
}
控制器類
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package co.za.chrispie.addressBook;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
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 OracleAddressBookController implements Initializable {
@FXML
TableView<Person> table;
@FXML
TableColumn<Person, String> colFirstName;
@FXML
TableColumn<Person, String> colLastName;
@FXML
TableColumn<Person, String> colEmail;
final ObservableList<Person> data = FXCollections.observableArrayList(
new Person("Jaco", "Pieters", "[email protected]"),
new Person("Chrispie", "Pieters", "[email protected]")
);
@Override
public void initialize(URL url, ResourceBundle rb) {
assert colFirstName != null : "fx:id=\"colFirstName\" was not injected: check your FXML file 'OracleAddressBook.fxml'.";
assert colLastName != null : "fx:id=\"colLastName\" was not injected: check your FXML file 'OracleAddressBook.fxml'.";
assert colEmail != null : "fx:id=\"colEmail\" was not injected: check your FXML file 'OracleAddressBook.fxml'.";
configureTable();
}
private void configureTable() {
colFirstName.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
colLastName.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
colEmail.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));
table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
table.setItems(data);
assert table.getItems() == data;
}
}
和前端FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.net.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="500.0" prefWidth="600.0" styleClass="mainFxmlClass" xmlns:fx="http://javafx.com/fxml" fx:controller="co.za.chrispie.addressBook.OracleAddressBookController">
<children>
<Label layoutX="14.0" layoutY="11.0" text="Address Book" />
<TableView fx:id="table" layoutX="14.0" layoutY="35.0" prefHeight="451.0" prefWidth="572.0">
<columns>
<TableColumn prefWidth="75.0" text="First Name" fx:id="colFirstName" />
<TableColumn prefWidth="75.0" text="Last Name" fx:id="colLastName" />
<TableColumn prefWidth="75.0" text="Email" fx:id="colEmail" />
</columns>
</TableView>
</children>
<stylesheets>
<URL value="@oracleaddressbook.css" />
</stylesheets>
</AnchorPane>
我發現這個解釋很有用:[JavaFX Property Architecture](https://wiki.openjdk.java.net/display/OpenJFX/JavaFX+Property+Architecture) – will