Question

我正在使用IntelliJ和SceneBuilder创建预算管理器GUI。我不明白为什么Scene Builder只识别我的一些@FXML标记，而不是全部。即使当我在.fxml文件中手动输入fx：id时，它也将显示在特定元素的“场景构建器”代码部分中，但不会链接到控制器。具体来说，我正在尝试将项目添加到两个选择框中，但是我正在获得NPE。我不确定发生了什么。

//工作控制器

package budget_master.controller;

import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.stage.Stage;

public class main_scrn_cntrl {

    private Stage primaryStage;

    @FXML
    private Button exit_btn;

    //method to handle exit btn function
    @FXML
    private void handleExitBtn(){
        primaryStage = (Stage) exit_btn.getScene().getWindow();
        primaryStage.close();
    }
}

//正在使用.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.Font?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="budget_master.controller.main_scrn_cntrl">
   <children>
      <BorderPane prefHeight="600.0" prefWidth="800.0">
         <top>
            <FlowPane alignment="CENTER" prefHeight="40.0" prefWidth="200.0" BorderPane.alignment="CENTER">
               <children>
                  <Label text="Budget Master 2019">
                     <font>
                        <Font size="16.0" />
                     </font>
                  </Label>
               </children></FlowPane>
         </top>
         <center>
            <TabPane fx:id="budgetTabs" prefHeight="200.0" prefWidth="200.0" tabClosingPolicy="UNAVAILABLE" BorderPane.alignment="CENTER">
             <tabs>
                <Tab text="Ledger">
                     <content>
                         <fx:include source="ldgr_tab.fxml" />
                     </content>
                </Tab>
                <Tab text="Envelopes" >
                     <content>
                      <fx:include source="env_tab.fxml" />
                     </content>
                </Tab>
                <Tab text="Reports" />
             </tabs>
            </TabPane>
         </center>
         <bottom>
            <FlowPane alignment="BOTTOM_RIGHT" prefHeight="40.0" prefWidth="200.0" BorderPane.alignment="CENTER">
               <children>
                   <ButtonBar prefHeight="40.0" prefWidth="200.0">
                    <buttons>
                      <Button fx:id="exit_btn" mnemonicParsing="false" onAction="#handleExitBtn" text="Exit" />
                    </buttons>
                     <FlowPane.margin>
                        <Insets right="5.0" />
                     </FlowPane.margin>
                  </ButtonBar>
               </children>
            </FlowPane>
         </bottom></BorderPane>
   </children>
</AnchorPane>

//控制器不起作用

package budget_master.controller;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ChoiceBox;
import java.net.URL;
import java.util.ArrayList;
import java.util.ResourceBundle;

/**
 * Created by Jengel1 on 12/24/2018.
 */
public class env_tab_cntrl implements Initializable {

    static ArrayList<String> env_list = new ArrayList();
    static ObservableList<String> env_cb_list = 
FXCollections.observableArrayList(env_list);

    @FXML
    private static ChoiceBox env_to_cb;
    @FXML
    private static ChoiceBox env_from_cb;

    @FXML
    public static void initialize() {

        System.out.println("env init");
        load_env_list();

        env_to_cb.setValue("Select Envelope");
        env_from_cb.setValue("Select Envelope");
        env_to_cb.setItems(env_cb_list);
        env_from_cb.setItems(env_cb_list);
    }

private static void load_env_list(){
    env_list.add("Check Balance");
    env_list.add("Rent");
    env_list.add("Dogs");
}

    @FXML
    @Override
    public void initialize(URL location, ResourceBundle resources) {
        load_env_list();

        env_to_cb.setValue("Select Envelope");
        env_from_cb.setValue("Select Envelope");
        env_to_cb.setItems(env_cb_list);
        env_from_cb.setItems(env_cb_list);
    }
}

//。fxml文件不起作用

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ChoiceBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.FlowPane?>
<?import javafx.scene.text.Font?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="560.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="budget_master.controller.env_tab_cntrl">
   <children>
      <BorderPane prefHeight="490.0" prefWidth="800.0">
         <top>
            <FlowPane alignment="CENTER" prefHeight="30.0" prefWidth="800.0">
               <children>
                    <ChoiceBox fx:id="env_to_cb" prefWidth="150.0">
                       <FlowPane.margin>
                          <Insets left="10.0" right="10.0" />
                       </FlowPane.margin>
                    </ChoiceBox>
                    <ChoiceBox fx:id="env_from_cb" prefWidth="150.0">
                        <FlowPane.margin>
                            <Insets left="10.0" right="10.0" />
                        </FlowPane.margin>
                    </ChoiceBox>
                </children></FlowPane>
         </top>
   </children>
</AnchorPane>

Scene Builder仅识别我的一些FXML标记，但不是全部

0 个答案: