當我設置數據到ObservableList
它拋出空指針異常,我不明白這個問題。任何人都可以幫我找到解決方案。將數據設置到JavaFX中的TableView時出現空指針異常?
這裏是我的代碼:
@FXML
private Label label;
@FXML
private ObservableList<ObservableList> data;
@FXML
private TableColumn column1;
@FXML
private TableColumn column2;
@FXML
private TableView table;
public void initialize(URL url, ResourceBundle rb) {
// TODO
String selectSql = "select first_name,last_name from hr.employees";
try (Connection conn = ConnectDB.getConnection(); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery(selectSql)) {
System.out.println("Getting Connection....");
while (rs.next()) {
ObservableList<String> temp = FXCollections.observableArrayList();
temp.add(rs.getString(1));
System.out.println("First Name == "+rs.getString(1));
System.out.println("Last Name == "+rs.getString(2));
temp.add(rs.getString(2));
System.out.println("List Value === "+temp);
data.add(temp);
//table.setItems(temp);
}
table.setItems(data);
} catch (Exception e) {
//System.out.println("Error: "+e.getMessage());
Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, e);
}
}
我收到錯誤---> data.add(臨時);
的列表,其中線也異常提高?您有兩個ObservableList s:ObservableList temp = FXCollections.observableArrayList();和其他:是ObservableList 數據 請發佈stacktrace –
pleft
我越來越錯誤---> data.add(temp); – Thirunavukkarasu
可能是@FXMLprivate ObservableList data;不適用於ObservableList類型,並且您的數據對象未實例化。 也許你想這樣寫: ObservableList data = table.getItems() –
pleft