我是javaFX的新手，我正在研究javaFX应用程序。 我得到的错误是我无法从fxml文件中获取子节点，fxml文件是这样的
<children>
<VBox fx:id="sideMenuVBox" alignment="TOP_CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="600.0" minWidth="125.0">
<children>
<Button fx:id="headingButton" maxWidth="1.7976931348623157E308" onAction="#helpButtonOnAction" text="Masters" />
<Button fx:id="openCompanyButton" maxWidth="1.7976931348623157E308" onAction="#openCompanyButtonOnAction" text="Open Company" textAlignment="CENTER" wrapText="true" />
<Button fx:id="newCompanyButton" maxWidth="1.7976931348623157E308" onAction="#newCompanyButtonOnAction" text="New Company" textAlignment="CENTER" wrapText="true" />
<Button fx:id="closeCompanyButton" maxWidth="1.7976931348623157E308" onAction="#closeCompanyButtonOnAction" text="Close Company" textAlignment="CENTER" wrapText="true" />
<Button fx:id="chartOfAccountsButton" maxWidth="1.7976931348623157E308" onAction="#chartOfAccountsButtonOnAction" text="Chart of Accounts" textAlignment="CENTER" wrapText="true" />
<Button fx:id="newUserButton" maxWidth="1.7976931348623157E308" onAction="#newUserButtonOnAction" text="New User" textAlignment="CENTER" wrapText="true" />
<Button fx:id="userSetUpButton" maxWidth="1.7976931348623157E308" onAction="#userSetUpButtonOnAction" text="User SetUp" textAlignment="CENTER" wrapText="true" />
<Button fx:id="unitMasterButton" maxWidth="1.7976931348623157E308" onAction="#unitMasterButtonOnAction" text="Unit Master" textAlignment="CENTER" wrapText="true" />
<Button fx:id="itemMasterButton" maxWidth="1.7976931348623157E308" onAction="#itemMasterButtonOnAction" text="Item Master" textAlignment="CENTER" wrapText="true" />
<Button fx:id="narrationSetUpButton" maxWidth="1.7976931348623157E308" onAction="#narrationSetUpButtonOnAction" text="Narration SetUp" textAlignment="CENTER" wrapText="true" />
<Button fx:id="miscellaneousSetUpButton" maxWidth="1.7976931348623157E308" onAction="#miscellaneousSetUpButtonOnAction" text="Miscellaneous SetUp" textAlignment="CENTER" wrapText="true" />
<Button fx:id="numberingSetUpButton" maxWidth="1.7976931348623157E308" onAction="#numberingSetUpButtonOnAction" text="Numbering SetUp" textAlignment="CENTER" wrapText="true" />
<Button fx:id="sundrySetUpButton" maxWidth="1.7976931348623157E308" onAction="#sundrySetUpButtonOnAction" text="Sundry SetUp" textAlignment="CENTER" wrapText="true" />
<Button fx:id="inventoryFlowButton" maxWidth="1.7976931348623157E308" onAction="#inventoryFlowButtonOnAction" text="Inventory Flow" textAlignment="CENTER" wrapText="true" />
<Button fx:id="challanTypeButton" maxWidth="1.7976931348623157E308" onAction="#challanTypeButtonOnAction" text="Challan Type" textAlignment="CENTER" wrapText="true" />
<Button fx:id="mergeLedgersButton" maxWidth="1.7976931348623157E308" onAction="#mergeLedgersButtonOnAction" text="Merge Ledgers" textAlignment="CENTER" wrapText="true" />
<Button fx:id="transferOpeningBalanceButton" maxWidth="1.7976931348623157E308" onAction="#transferOpeningBalanceButtonOnAction" text="Transfer Opening Balance" textAlignment="CENTER" wrapText="true" />
<Button fx:id="backUpRestoreButton" maxWidth="1.7976931348623157E308" onAction="#backUpRestoreButtonOnAction" text="Back Up & Restore" textAlignment="CENTER" wrapText="true" />
<Button fx:id="helpButton" maxWidth="1.7976931348623157E308" onAction="#helpButtonOnAction" text="Help" textAlignment="CENTER" wrapText="true" />
</children>
</VBox>
</children>
</AnchorPane>
我正在获取VBox，但没有任何其他按钮。 这是相应的控制器代码。 公共类ModifyMenu实现Initializable {
@FXML
private Label titleOfPage;
@FXML
private ComboBox<String> combo;
@FXML
private VBox vbox;
@FXML
private AnchorPane anchor;
private List<String> mastersList;
private List<String> addressBookList;
private List<String> vouchersList;
private List<String> salesPurchaseList;
private List<String> financialRegistersList;
private List<String> inventoryRegistersList;
private List<String> finalReportsList;
private List<String> misReportsList;
@FXML
private AnchorPane content;
public void comboOnAction()
{
String selectedItem=this.combo.getSelectionModel().getSelectedItem();
List<String> resultantList;
if(selectedItem.equals("Masters"))
{
resultantList=this.mastersList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Address Book"))
{
resultantList=this.addressBookList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Vouchers"))
{
resultantList=this.vouchersList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Sales Purchase"))
{
resultantList=this.salesPurchaseList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Financial Registers"))
{
resultantList=this.financialRegistersList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Inventory Registors"))
{
resultantList=this.inventoryRegistersList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("Final Reports"))
{
resultantList=this.finalReportsList;
this.vbox.getChildren().clear();
show(resultantList);
}
else if(selectedItem.equals("MIS Reports"))
{
resultantList=this.misReportsList;
this.vbox.getChildren().clear();
show(resultantList);
}
}
public void show(List<String> menuTypeInString)
{
ObservableList menuObservaleArrayList=
FXCollections.observableArrayList(menuTypeInString);
for(int i=0;i<menuObservaleArrayList.size();i++)
{
HBox hbox=new HBox();
Label dynamicListLabel=new Label();
// dynamicListLabel.setMaxSize(100,10);
dynamicListLabel.setText(menuObservaleArrayList.get(i).toString());
TextField newNameTextField=new TextField();
// newNameTextField.setMaxSize(100,10);
Button makeChangeButton=new Button();
makeChangeButton.setText("Change Name");
makeChangeButton.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent event)
{
String ButtonName=dynamicListLabel.toString();
String inputButtonName = newNameTextField.getText();
System.out.println(getClass().getResource(""));
try {
content=FXMLLoader.load(getClass().getResource
("/com/openlx/kalculate/views/masters/SideMenu.fxml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// AnchorPane childHolder;
// childHolder.getChildren().addAll(content);
//content.getChildrenUnmodifiable().listIterator(i).toString();
System.out.println(content.getChildren().toString());
// ((Pane) content.getChildren()).getChildren();
System.out.println(((Pane) content.getChildren()).getChildren().toString());
/* content.getChildren().clear();
content.getChildren().addAll();
Button btn=(Button) content.lookup(ButtonName);
hbox.getChildren().add(dynamicListLabel);
hbox.getChildren().add(newNameTextField);
hbox.getChildren().add(makeChangeButton);
hbox.getChildren().add(btn);
*/
}
});
hbox.getChildren().add(dynamicListLabel);
hbox.getChildren().add(newNameTextField);
hbox.getChildren().add(makeChangeButton);
vbox.getChildren().add(hbox);
if(newNameTextField.getText()!=null)
{
}
}
}
@Override
public void initialize(URL location, ResourceBundle resources) {
// TODO Auto-generated method stub
List<String> mainList=new ArrayList<String>();
mainList.add("Masters");
mainList.add("Address Book");
mainList.add("Vouchers");
mainList.add("Sales Purchase");
mainList.add("Financial Registers");
mainList.add("Inventory Registers");
mainList.add("Final Reports");
mainList.add("MIS Reports");
ObservableList menuObservaleArrayList=
FXCollections.observableArrayList(mainList);
combo.setItems(menuObservaleArrayList);
mastersList=new ArrayList<String>();
mastersList.add("Open Company");
mastersList.add("New Company");
mastersList.add("Close Company");
mastersList.add("Charts Of Accounts");
mastersList.add("New User");
mastersList.add("User Setup");
mastersList.add("Unit Master");
mastersList.add("Item Master");
mastersList.add("Narration Setup");
mastersList.add("Miscellaneous Setup");
mastersList.add("Numbering Setup");
mastersList.add("Sundry Setup");
mastersList.add("Inventory Flow");
mastersList.add("Challan Type");
mastersList.add("Merge Ledgers");
mastersList.add("Transfering Opening Balance");
mastersList.add("Back Up & Restore");
mastersList.add("Help");
addressBookList=new ArrayList<String>();
addressBookList.add("Show Address Book");
addressBookList.add("Supplier Entry");
addressBookList.add("Customer Entry");
addressBookList.add("Help");
vouchersList=new ArrayList<String>();
vouchersList.add("Cash Reciept");
vouchersList.add("Cash Payement");
vouchersList.add("Bank Reciept");
vouchersList.add("Bank Payement");
vouchersList.add("Journal Voucher");
vouchersList.add("Journal Sales");
vouchersList.add("Journal Purchase");
vouchersList.add("Debit Note");
vouchersList.add("Credit Note");
vouchersList.add("Contra Entry");
vouchersList.add("Help");
salesPurchaseList=new ArrayList<String>();
salesPurchaseList.add("Quotation");
salesPurchaseList.add("Order Acknowledgement");
salesPurchaseList.add("Challan Cum Sales Invoice");
salesPurchaseList.add("Challan");
salesPurchaseList.add("Sales Invoice");
salesPurchaseList.add("Sales Return");
salesPurchaseList.add("Enquiry");
salesPurchaseList.add("Purchase Order");
salesPurchaseList.add("Purchase Invoice");
salesPurchaseList.add("Purchase Return");
salesPurchaseList.add("GRN Cum Purchase Invoice");
salesPurchaseList.add("Goods Reciept Note");
salesPurchaseList.add("Process Existing Voucher");
salesPurchaseList.add("Stock Adjustment Voucher(Add)");
salesPurchaseList.add("Stock Adjustment Voucher(Deduct)");
salesPurchaseList.add("Help");
financialRegistersList=new ArrayList<String>();
financialRegistersList.add("Cash book");
financialRegistersList.add("Cash Reciept Book");
financialRegistersList.add("Cash Payement Book");
financialRegistersList.add("Bank Book");
financialRegistersList.add("Bank Payement Book");
financialRegistersList.add("Bank Reciept Book");
financialRegistersList.add("Day Book");
financialRegistersList.add("Ledger");
financialRegistersList.add("Journal Book");
financialRegistersList.add("Debit Note Book");
financialRegistersList.add("Credit Note Book");
financialRegistersList.add("Cheque Book");
financialRegistersList.add("Customer Book");
financialRegistersList.add("Supplier Book");
financialRegistersList.add("Help");
inventoryRegistersList=new ArrayList<String>();
inventoryRegistersList.add("Quotation Registers");
inventoryRegistersList.add("Order Acknowledgement Registers");
inventoryRegistersList.add("Challan Registers");
inventoryRegistersList.add("Invoice Registers");
inventoryRegistersList.add("Sales Return Registers");
inventoryRegistersList.add("Sales Registers");
inventoryRegistersList.add("Sales Summary");
inventoryRegistersList.add("Enquiry Registers");
inventoryRegistersList.add("Purchase Order Registers");
inventoryRegistersList.add("Purchase Invoice Registers");
inventoryRegistersList.add("Purchase Return Registers");
inventoryRegistersList.add("Goods Reciept Note Registers");
inventoryRegistersList.add("Purchase Registers");
inventoryRegistersList.add("Purchase Summary");
inventoryRegistersList.add("Stock Registers");
inventoryRegistersList.add("Stock Movement");
inventoryRegistersList.add("Stock Adjustment Details");
inventoryRegistersList.add("Custom Stock BAlance");
inventoryRegistersList.add("Help");
finalReportsList=new ArrayList<String>();
finalReportsList.add("Trial Balance");
finalReportsList.add("Income And Expenditure A/C");
finalReportsList.add("Profit And Loss A/C");
finalReportsList.add("Balance Sheet A/C");
finalReportsList.add("Help");
misReportsList=new ArrayList<String>();
misReportsList.add("Group Summary");
misReportsList.add("Statement Of Debtors With Ageing");
misReportsList.add("Statement Of Creditors With AGeing");
misReportsList.add("Sundry Ledgers");
misReportsList.add("Account Status Confirmation");
misReportsList.add("Payement Reminders");
misReportsList.add("Negative Cash Warning");
misReportsList.add("Depraction Statement");
misReportsList.add("Item Ladger");
misReportsList.add("Re-Order Level Report");
misReportsList.add("Rate List");
misReportsList.add("Customer Ledger");
misReportsList.add("Supplier Ledger");
misReportsList.add("Bank Reconciliation");
misReportsList.add("Help");
}
}
这个错误正在发生在这个部分，
@Override
public void handle(ActionEvent event)
{
String ButtonName=dynamicListLabel.toString();
String inputButtonName = newNameTextField.getText();
System.out.println(getClass().getResource(""));
try {
content=FXMLLoader.load(getClass().getResource
("/com/openlx/kalculate/views/masters/SideMenu.fxml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// AnchorPane childHolder;
// childHolder.getChildren().addAll(content);
//content.getChildrenUnmodifiable().listIterator(i).toString();
System.out.println(content.getChildren().toString());
// ((Pane) content.getChildren()).getChildren();
System.out.println(((Pane) content.getChildren()).getChildren().toString());
/* content.getChildren().clear();
content.getChildren().addAll();
Button btn=(Button) content.lookup(ButtonName);
hbox.getChildren().add(dynamicListLabel);
hbox.getChildren().add(newNameTextField);
hbox.getChildren().add(makeChangeButton);
hbox.getChildren().add(btn);
*/
}
});
hbox.getChildren().add(dynamicListLabel);
hbox.getChildren().add(newNameTextField);
hbox.getChildren().add(makeChangeButton);
vbox.getChildren().add(hbox);
我尝试了很多东西，但它只说PArent $ 2不能被投射到javafx.scene。（任何）。
答案 0 :(得分：0)
您的content变量是AnchorPane，因此行
((Pane) content.getChildren()).getChildren();
错误，因为content.getChildren()会返回子列表（ObservableList<Node>），并且无法转换为Pane。
VBox与fx：id =＆＃34; sideMenuVBox＆＃34;是AnchorPane的唯一孩子。你可以把它作为
VBox vb = (VBox) content.getChildren().get(0);
然后您可以通过
获取vbox的按钮子项vb.getChildren();
但是，FXML文件中的所有控件都定义了fx:id属性。您可以使用这些ID直接注入和访问它们。有关更多信息，请研究fx：id的用途。