vscode でscene builderが使えない

ヘディングのテキストプログラミング初心者です。

vscodeでscene builderを使用してguiを作成したいと考えています。
いくつかのサイトを参考にして、javafx、scene builderの設定を行い、vscodeで使用できる設定ができていると思います。
ここで、各コントロールのイベントを設定したいと考えております。
しかし、イベント用のコードをどのように挿入したらよいのかわかりません。
未熟なコードとなり大変申し訳ございませんが、ご意見いただければ幸いです。
以下に私の現状を添付致します。

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class App extends Application {
    @Override
    public void start(Stage primaryStage) {
        try {
            FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Mainframe.fxml"));
            Parent root = (Parent) fxmlLoader.load();
            Scene scene = new Scene(root);

            primaryStage.setTitle("test-Window");
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

以下 Mainframe.java

import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import java.util.Optional;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.ButtonType;

public class Mainframe {

    @FXML
    private ResourceBundle resources;

    @FXML
    private URL location;

    @FXML
    private Button button1;

    @FXML
    private TextField textFiled1;

    @FXML
    void handleButtonAction(ActionEvent event) {
        Alert alert = new Alert(AlertType.CONFIRMATION);
        alert.setTitle("Title!");
        alert.setHeaderText("Header!");
        alert.setContentText("You entered: " + textFiled1.getText());
        Optional<ButtonType> result = alert.showAndWait();
        if (result.isPresent() && result.get() == ButtonType.OK) {
            System.out.println("You clicked OK");
        }

    }

    @FXML
    void initialize() {
        assert button1 != null : "fx:id=\"button1\" was not injected: check your FXML file 'Mainframe.fxml'.";
        assert textFiled1 != null : "fx:id=\"textFiled1\" was not injected: check your FXML file 'Mainframe.fxml'.";

    }

}

Mainframe.fxml

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

<!--
  Copyright (c) 2015, 2019, Gluon and/or its affiliates.
  All rights reserved. Use is subject to license terms.

  This file is available and licensed under the following license:

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  - Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
  - Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the distribution.
  - Neither the name of Oracle Corporation nor the names of its
    contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.SeparatorMenuItem?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>

<VBox prefHeight="400.0" prefWidth="640.0" xmlns="http://javafx.com/javafx/18" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Mainframe">
  <children>
    <MenuBar VBox.vgrow="NEVER">
      <menus>
        <Menu mnemonicParsing="false" text="File">
          <items>
            <MenuItem mnemonicParsing="false" text="New" />
            <MenuItem mnemonicParsing="false" text="Open…" />
            <Menu mnemonicParsing="false" text="Open Recent" />
            <SeparatorMenuItem mnemonicParsing="false" />
            <MenuItem mnemonicParsing="false" text="Close" />
            <MenuItem mnemonicParsing="false" text="Save" />
            <MenuItem mnemonicParsing="false" text="Save As…" />
            <MenuItem mnemonicParsing="false" text="Revert" />
            <SeparatorMenuItem mnemonicParsing="false" />
            <MenuItem mnemonicParsing="false" text="Preferences…" />
            <SeparatorMenuItem mnemonicParsing="false" />
            <MenuItem mnemonicParsing="false" text="Quit" />
          </items>
        </Menu>
        <Menu mnemonicParsing="false" text="Edit">
          <items>
            <MenuItem mnemonicParsing="false" text="Undo" />
            <MenuItem mnemonicParsing="false" text="Redo" />
            <SeparatorMenuItem mnemonicParsing="false" />
            <MenuItem mnemonicParsing="false" text="Cut" />
            <MenuItem mnemonicParsing="false" text="Copy" />
            <MenuItem mnemonicParsing="false" text="Paste" />
            <MenuItem mnemonicParsing="false" text="Delete" />
            <SeparatorMenuItem mnemonicParsing="false" />
            <MenuItem mnemonicParsing="false" text="Select All" />
            <MenuItem mnemonicParsing="false" text="Unselect All" />
          </items>
        </Menu>
        <Menu mnemonicParsing="false" text="Help">
          <items>
            <MenuItem mnemonicParsing="false" text="About MyHelloApp" />
          </items>
        </Menu>
      </menus>
    </MenuBar>
    <AnchorPane maxHeight="-1.0" maxWidth="-1.0" prefHeight="-1.0" prefWidth="-1.0" VBox.vgrow="ALWAYS">
      <children>
        <Label alignment="CENTER" layoutX="155.0" layoutY="177.0" style="&#10;" textAlignment="CENTER" textFill="#9f9f9f" wrapText="false">
          <font>
            <Font size="18.0" />
          </font>
        </Label>
            <Button fx:id="button1" layoutX="14.0" layoutY="76.0" mnemonicParsing="false" onAction="#handleButtonAction" text="OK" textFill="#d7064c" />
            <TextField fx:id="textFiled1" layoutX="14.0" layoutY="38.0" />
      </children>
    </AnchorPane>
  </children>
</VBox>

行動規範の内容に同意します

回答1件

ベストアンサー

しかし、イベント用のコードをどのように挿入したらよいのかわかりません。

FXMLLoader#getController()で、Mainframeを取得し、それにあれこれすればいい。

java
1public void start(Stage primaryStage) {
2try {
3FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Mainframe.fxml"));
4Parent root = (Parent) fxmlLoader.load();
5Scene scene = new Scene(root);

java
1    final Mainframe controller = fxmlLoader.getController();
2    controller.button.setOnAction(...);

もしくは、Mainframe#initialize()であれこれするか。

java
1public class Mainframe {
2  ...
3  @FXML
4  void initialize() {
5    button.setOnAction(...);
6  }

投稿2022/06/02 23:39

編集2022/06/02 23:41

shiketa

総合スコア3937

回答へのコメント

sato422

2022/06/03 13:00

ご回答ありがとうございます。 Mainframeを取得する方法では、以下のエラーが表示されます。 The field Mainframe.button1 is not visibleJava(33554503) また、Mainframe#initialize()であれこれしようとすると、以下のエラーが表示されます。 The method setOnAction(EventHandler<ActionEvent>) in the type ButtonBase is not applicable for the arguments 一応、buttonのidは"button1"、fx:idは"button1"、On Actionは"handleButtonAction"としています。参考にしたサイトは・https://danpapa-hry.hateblo.jp/entry/2020/02/21/234915 ・https://java.keicode.com/lib/javafx-scene-builder.php になります。ご回答宜しくお願い致します。