常連

### 前提・実現したいこと

javaFXを学んでいて、いま、スケジュール表を作っています。スケジュール表には、予定を追加したいところをマウスでクリックすると予定を設定できる画面に移り、
そこで設定できるような機能を付けたいので、1つのControllerクラスに2つのFXMLを関連付けてコードを書いていたところ、fx:idを登録したAnchorPane（下のコードのaPane)がnullになっていて、ヌルポが出てしまっていることに気付きました。

2つのfxmlを関連付けるとfx:idはNullになってしまうのでしょうか、教えていただけると助かります。

### 該当のソースコード

```ScheduleTableController
/**
 * Sample Skeleton for 'ScheduleIndividual.fxml' Controller Class
 */

package application;



public class ScheduleTableController {


 @FXML // ResourceBundle that was given to the FXMLLoader
 private ResourceBundle resources;

 @FXML // URL location of the FXML file that was given to the FXMLLoader
 private URL location;

 @FXML // fx:id="pane"
 private VBox pane; // Value injected by FXMLLoader
 
 @FXML // fx:id="aPane"
 private AnchorPane aPane; // Value injected by FXMLLoader
 
 @FXML // fx:id="aPane"
 private VBox scheduleIndividual; // Value injected by FXMLLoader
 
 
 //ここからScheduleSelectのid

 @FXML // fx:id="scheduleName"
 private TextField scheduleName; // Value injected by FXMLLoader

 @FXML // fx:id="sHour"
 private ComboBox<String> sHour; // Value injected by FXMLLoader

 @FXML // fx:id="sakusei"
 private Button sakusei; // Value injected by FXMLLoader

 @FXML // fx:id="packageSelect"
 private ComboBox<?> packageSelect; // Value injected by FXMLLoader

 @FXML // fx:id="month"
 private ComboBox<?> month; // Value injected by FXMLLoader

 @FXML // fx:id="scheduleSelct"
 private AnchorPane scheduleSelect; // Value injected by FXMLLoader

 @FXML // fx:id="year"
 private ComboBox<String> year; // Value injected by FXMLLoader

 @FXML // fx:id="fHour"
 private ComboBox<String> fHour; // Value injected by FXMLLoader

 @FXML // fx:id="fMinute"
 private ComboBox<String> fMinute; // Value injected by FXMLLoader

 @FXML // fx:id="memo"
 private TextArea memo; // Value injected by FXMLLoader

 @FXML // fx:id="sMinute"
 private ComboBox<String> sMinute; // Value injected by FXMLLoader

 @FXML // fx:id="day"
 private ComboBox<String> day; // Value injected by FXMLLoader

 @FXML
 void clickMemo(MouseEvent event) {
 	
 }
 
 @FXML
 void sets(MouseEvent event) {
 	try {
			showSecondWindow();
		} catch (IOException e) {
			e.printStackTrace();
		}
 }

 @FXML
 void jikkou(MouseEvent event) {
 	addScheduleLabel(addData());
 }
 
 void showSecondWindow() throws IOException {

		FXMLLoader loader = new FXMLLoader(getClass().getResource("ScheduleSelect.fxml"));
		AnchorPane root = (AnchorPane) loader.load();
		Scene scene = new Scene(root);
		Stage stage = new Stage();
		stage.setScene(scene);
		stage.showAndWait();

	}
 
 ScheduleData addData() {
 	String name = scheduleName.getText();
 	var sTime = LocalTime.of(Integer.parseInt(sHour.getValue()),Integer.parseInt(sMinute.getValue()));
 	var fTime = LocalTime.of(Integer.parseInt(fHour.getValue()),Integer.parseInt(fMinute.getValue()));
 	String detail = memo.getText();
 	var sd = new ScheduleData(name, sTime, fTime, detail);
 	return sd;
 }
 
 @SuppressWarnings("static-access")
	void addScheduleLabel(ScheduleData data) {
 	var sLabel = new Label();
 		double stNum = (data.getsTime().getHour()+data.getsTime().getMinute()/60)*30+4;
 	 double ftNum = (data.getfTime().getHour()+data.getfTime().getMinute()/60)*30+4;
 	 double tNum = ftNum-stNum;
 		String str = data.gettitle()+"\n"+data.gettime()+"\n"+data.getDetail();
 		sLabel.setText(str);
 		aPane.getChildren().add(sLabel);
 		aPane.setTopAnchor(sLabel, stNum);
 		sLabel.setPrefHeight(tNum);
 		}
	

	@FXML // This method is called by the FXMLLoader when initialization is complete
 void initialize() {
 		
 		
 		
 	 
 				
 assert pane != null : "fx:id=\"pane\" was not injected: check your FXML file 'ScheduleIndividual.fxml'.";
 
 }
}
```
```Select
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane fx:id="scheduleSelect" prefHeight="400.0" prefWidth="300.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.ScheduleTableController">
 <children>
 <Label layoutX="77.0" layoutY="14.0" prefHeight="27.0" prefWidth="127.0" text="予定を追加する" textAlignment="CENTER" AnchorPane.leftAnchor="77.0" AnchorPane.rightAnchor="96.0" AnchorPane.topAnchor="14.0">
 
 
 
 </Label>
 <Label layoutX="5.0" layoutY="53.0" prefHeight="20.0" prefWidth="46.0" text="パッケージ" AnchorPane.leftAnchor="5.0" AnchorPane.topAnchor="53.0" />
 <Label layoutX="14.0" layoutY="93.0" text="名前" />
 <Label layoutX="14.0" layoutY="133.0" prefHeight="17.0" prefWidth="28.0" text="日付" />
 <Label layoutX="14.0" layoutY="172.0" text="時間" />
 <Label layoutX="17.0" layoutY="259.0" text="メモ" />
 <ComboBox fx:id="packageSelect" editable="true" layoutX="66.0" layoutY="51.0" prefHeight="25.0" prefWidth="121.0" promptText="新規作成の場合は入力" />
 <TextField fx:id="scheduleName" layoutX="64.0" layoutY="89.0" prefHeight="25.0" prefWidth="127.0" />
 <ComboBox fx:id="year" layoutX="53.0" layoutY="129.0" prefHeight="25.0" prefWidth="50.0" />
 <Label layoutX="107.0" layoutY="133.0" prefHeight="17.0" prefWidth="14.0" text="年" />
 <Label layoutX="224.0" layoutY="93.0" text="＊必須" />
 <Label layoutX="248.0" layoutY="160.0" text="＊必須" />
 <ComboBox fx:id="sMinute" editable="true" layoutX="120.0" layoutY="168.0" prefHeight="25.0" prefWidth="36.0" />
 <ComboBox fx:id="sHour" editable="true" layoutX="64.0" layoutY="169.0" prefHeight="25.0" prefWidth="50.0" />
 <Label layoutX="114.0" layoutY="161.0" prefHeight="20.0" prefWidth="6.0" text=":">
 
 
 
 </Label>
 <Label layoutX="100.0" layoutY="198.0" prefHeight="20.0" prefWidth="20.0" text="～">
 
 
 
 </Label>
 <Label layoutX="175.0" layoutY="190.0" prefHeight="20.0" prefWidth="6.0" text=":">
 
 
 
 </Label>
 <ComboBox fx:id="fHour" editable="true" layoutX="125.0" layoutY="198.0" prefHeight="25.0" prefWidth="50.0" />
 <ComboBox fx:id="fMinute" editable="true" layoutX="181.0" layoutY="197.0" prefHeight="25.0" prefWidth="36.0" />
 <TextArea fx:id="memo" layoutX="53.0" layoutY="259.0" onMouseClicked="#clickMemo" prefHeight="91.0" prefWidth="226.0" />
 <Button fx:id="sakusei" layoutX="113.0" layoutY="359.0" mnemonicParsing="false" onMouseClicked="#jikkou" prefHeight="27.0" prefWidth="64.0" text="作成" />
 <Label layoutX="180.0" layoutY="133.0" prefHeight="17.0" prefWidth="14.0" text="月" />
 <ComboBox fx:id="month" layoutX="125.0" layoutY="129.0" prefHeight="25.0" prefWidth="50.0" />
 <ComboBox fx:id="day" layoutX="197.0" layoutY="129.0" prefHeight="25.0" prefWidth="50.0" />
 <Label layoutX="252.0" layoutY="133.0" prefHeight="17.0" prefWidth="14.0" text="日" />
 </children>
</AnchorPane>

```
```Table
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import javafx.geometry.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>

<fx:root fx:id="scheduleIndividual" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="130.0" styleClass="ScheduleTable" type="VBox" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.ScheduleTableController">
 <children>
 <AnchorPane prefHeight="100.0" prefWidth="130.0">
 <children>
 <Label text="日付" textAlignment="CENTER" AnchorPane.bottomAnchor="60.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="60.0" AnchorPane.topAnchor="0.0">
 
 
 
 </Label>
 <CheckBox mnemonicParsing="false" text="CheckBox" AnchorPane.leftAnchor="20.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="40.0" />
 <CheckBox mnemonicParsing="false" text="CheckBox" AnchorPane.leftAnchor="20.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="57.0" />
 <CheckBox mnemonicParsing="false" text="CheckBox" AnchorPane.leftAnchor="20.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="74.0" />
 </children>
 </AnchorPane>
 <ScrollPane prefHeight="400.0" prefWidth="130.0" vbarPolicy="ALWAYS">
 <content>
 <HBox minWidth="130.0" prefHeight="740.0" prefWidth="130.0">
 <children>
 <AnchorPane prefHeight="740.0" prefWidth="30.0">
 <children>
 <Label text="0:00" AnchorPane.topAnchor="0.0" />
 </children>
 </AnchorPane>
 <AnchorPane fx:id="aPane" onMouseClicked="#sets" prefHeight="740.0" prefWidth="100.0" />
 </children>
 </HBox>
 </content>
 </ScrollPane>
 <TextArea prefHeight="100.0" prefWidth="130.0" text="感想" />
 </children>
</fx:root>

```
### 試したこと

ここに問題に対して試したことを記載してください。

### 補足情報（FW/ツールのバージョンなど）

ここにより詳細な情報を記載してください。

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