JavaFX的 - 如何設置值，標簽內的文本字段？

Question

我試圖將值設置為選項卡內的文本字段。 我有多個標簽，我想為每個標簽內的文本字段設置值。 關於如何在標簽內設置文本字段的文本有任何想法嗎？ 我正在使用下面的代碼來更新文本字段的值，但是在嘗試執行相同操作時卻什么也沒有發生。

碼：

public class FXMLController {
    @FXML
    private Button inputXmlFileBtn;
    @FXML
    private TextField inputXmlName;
    @FXML
    private TabPane xmlData;
    @FXML
    private Tab vendorHeaderFb;
    @FXML
    private TextField vendorHeader1;
    Label label;

    public String inputXmlFileChooser() throws ParserConfigurationException,
            SAXException, IOException, JAXBException {
        FileChooser fileChooser = new FileChooser();
        // Set extension filter
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("XML files (*.xml)", "*.xml"));

        // Open Dialog
        File file = fileChooser.showOpenDialog(null);
        String xmlPath = "";
        xmlPath = file.getPath();

        // Set the path for inputXmlName text field
        if (file != null) {
            inputXmlName.setText(xmlPath);
        }

        //Unmarshall
        label = this.unmarshallXml();
        System.out.println(label.getVendorHeader1());
        vendorHeaderFb = new Tab();
        vendorHeader1 = new TextField();
        vendorHeader1.setText(label.getVendorHeader1());
        vendorHeaderFb.setContent(vendorHeader1);
        return xmlPath;
    }

更新了代碼，包括用於FXML的Pojo類。

public class FXMLController {
    @FXML
    private Button inputXmlFileBtn;
    @FXML
    private TextField inputXmlName;
    @FXML
    private TabPane xmlData;
    @FXML
    private Tab vendorHeaderFb;
    @FXML
    private TextField VendorHeader1;
    Label label;

    public String inputXmlFileChooser() throws ParserConfigurationException,
            SAXException, IOException, JAXBException {
        FileChooser fileChooser = new FileChooser();
        // Set extension filter
        fileChooser.getExtensionFilters().addAll(
                new ExtensionFilter("XML files (*.xml)", "*.xml"));

        // Open Dialog
        File file = fileChooser.showOpenDialog(null);
        String xmlPath = "";
        xmlPath = file.getPath();

        // Set the path for inputXmlName text field
        if (file != null) {
            inputXmlName.setText(xmlPath);
        }

        //Unmarshall
        label = this.unmarshallXml();
        System.out.println(label.getVendorHeader1());
        FXMLProps fxmlProps = new FXMLProps();
        fxmlProps.setVendorHeader1(label.getVendorHeader1());
        System.out.println(fxmlProps.getVendorHeader1());
        VendorHeader1 = new TextField();
        VendorHeader1.setText(fxmlProps.getVendorHeader1());
        //vendorHeaderFb.setContent(vendorHeader1);
        //vendorHeader1.setText(label.getVendorHeader1());
        //vendorHeaderFb.setContent(vendorHeader1);


        return xmlPath;
    }

POJO /屬性類

public class FXMLProps {
    private final SimpleStringProperty VendorHeader1 = new SimpleStringProperty(
            "");

    public FXMLProps() {
    }

    public FXMLProps(String VendorHeader1) {
        setVendorHeader1(VendorHeader1);
    }

    public String getVendorHeader1() {
        return VendorHeader1.get();
    }

    public void setVendorHeader1(String vH1) {
        VendorHeader1.set(vH1);
    }
}

我仍然無法設置文本字段vendorHeader1的值。 有人可以指出出什么問題了嗎？

Answer 1

您必須在TextField的text屬性和用於該值的SimpleStringProperty之間應用Binding 。 您必須以一種啟用其他類中的Binding選項的方式公開FXMLProps的vendor標頭屬性：

public class FXMLProps {

    private final SimpleStringProperty vendorHeader = new SimpleStringProperty("");

    public FXMLProps() {}

    public FXMLProps(String vendorHeader) {
        setVendorHeader(vendorHeader);
    }

    public String getVendorHeader() {
        return VendorHeader1.get();
    }

    public void setVendorHeader(String vendorHeaderText) {
        vendorHeader.set(vendorHeaderText);
    }

    // this is needed for the Binding
    public final SimpleStringProperty vendorHeaderProperty() {
        return vendorHeader;
    }
}

然后在某處你的應用程序（也許在start()你需要創建Binding像

// bind those two properties (TextField, SimpleStringProperty)
Bindings.bindBidirectional(vendorHeader1.textProperty(), fxmlProps.vendorHeaderProperty());