FXML과 JavaFX를 사용하여 토글 버튼을 사용하여 부울 변수를 설정하는 방법은 무엇입니까?

Question

나는 새로운 애호가 코더입니다. 나는 이것을 알아낼 수 없으며 지금까지 검색은 쓸모 없었다. FXML 파일에서 두 개의 토글 버튼을 사용하고 있는데 클릭하면 부울 변수를 정의하고 싶습니다. 그런 다음 나중에 해당 변수를 사용하여 일부 코드를 실행하기 위해 이동하는 경로를 나중에 드라이브하고 싶습니다. 변수를 정의하는 방법을 알 수 없습니다. 어떤 안내도 환영합니다.

FXML 파일 코드 (장면 빌더에 의해 생성) :

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

<?import java.lang.*?> 
<?import java.net.*?> 
<?import javafx.geometry.*?> 
<?import javafx.scene.text.*?> 
<?import javafx.scene.control.*?> 
<?import javafx.scene.layout.*?> 

<GridPane alignment="CENTER" hgap="10" styleClass="root" vgap="10" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="bmi.calculator.BMICalculatorController"> 

<padding><Insets bottom="10" left="25" right="25" top="25" /></padding> 
    <children> 


    <Text id="header-text" text="BMI Calculator" GridPane.columnIndex="0" GridPane.columnSpan="3" GridPane.rowIndex="0" /> 

    <Label text="Please enter your age:" GridPane.columnIndex="0" GridPane.rowIndex="1" /> 

    <TextField fx:id="ageBox" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="1" /> 

    <Label text="Enter your height in inches:" GridPane.columnIndex="0" GridPane.rowIndex="2" /> 

    <TextField fx:id="heightBox" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="2" /> 

    <Label text="Enter your weight in pounds:" GridPane.columnIndex="0" GridPane.rowIndex="3" /> 

    <TextField fx:id="weightBox" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="3" /> 

    <Label text="Do you use tobbaco?" GridPane.columnIndex="0" GridPane.rowIndex="4" /> 

    <ToggleButton onAction="#handleToggleYesAction" mnemonicParsing="false" prefHeight="31.0" prefWidth="85.0" text="Yes" GridPane.columnIndex="1" GridPane.rowIndex="4" /> 
    <ToggleButton onAction="#handleToggleNoAction" mnemonicParsing="false" prefHeight="31.0" prefWidth="85.0" text="No" GridPane.columnIndex="2" GridPane.rowIndex="4" /> 

    <HBox alignment="BOTTOM_RIGHT" spacing="10" GridPane.columnIndex="1" GridPane.columnSpan="2" GridPane.rowIndex="6"> 
     <children> 
      <Button onAction="#handleCalculateButtonAction" text="Calculate" /> 
     </children> 
    </HBox> 

    <Text fx:id="outputText1" wrappingWidth="211.0" GridPane.columnIndex="1" GridPane.rowIndex="8" /> 

    </children> 

    <stylesheets> 
     <URL value="@Login.css" /> 
    </stylesheets> 
    <columnConstraints> 
     <ColumnConstraints maxWidth="200.0" minWidth="180.0" prefWidth="200.0" /> 
     <ColumnConstraints maxWidth="100.0" minWidth="35.0" prefWidth="85.0" /> 
     <ColumnConstraints maxWidth="100.0" minWidth="25.0" prefWidth="85.0" /> 
    </columnConstraints> 
    <rowConstraints> 
    <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
     <RowConstraints /> 
    </rowConstraints> 

</GridPane> 

및 컨트롤러 :

package bmi.calculator; 

import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.scene.control.TextField; 
import javafx.scene.control.ToggleGroup; 
import javafx.scene.text.Text; 

public class BMICalculatorController { 
    @FXML private Text outputText1; 
    @FXML private TextField ageBox; 
    @FXML private TextField heightBox; 
    @FXML private TextField weightBox; 

    @FXML protected void handleToggleYesAction(ActionEvent t) { 
     boolean tobaccoToggle = true; 
    } 

    @FXML protected void handleToggleNoAction(ActionEvent t) { 
     boolean tobaccoToggle = false; 
    } 

    @FXML protected void handleCalculateButtonAction(ActionEvent event) { 

     //obtains the variables we need to work with 
     boolean tobacco = tobaccoToggle; //error is here 
     double weight = Double.parseDouble(weightBox.getText()); 
     double height = Double.parseDouble(heightBox.getText()); 
     int age = Integer.parseInt(ageBox.getText()); 

     //Disregard everything else below here for now - I'll be changing it up some later. 
     //performs BMI calculation 
     double bmi; 
     double stepOne; 
     stepOne = weight/height; 
     double stepTwo; 
     stepTwo = stepOne/height; 
     bmi = stepTwo*703; 

     //round BMI to two decimal places 
     double roundedbmi = bmi; 
     roundedbmi = roundedbmi * 100; 
     roundedbmi = Math.round(roundedbmi); 
     roundedbmi = roundedbmi/100; 

     //transform height to feet and inches 
     int height2 = (int)Math.round(height); 
     int heightFeet = height2/12; 
     int heightInches = height2%12; 

     //transform weight to int 
     int weight2 = (int)Math.round(weight); 

     outputText1.setText("Your BMI is " + roundedbmi); 

     //tell the user what they enetered 
     System.out.println("Your height is " + heightFeet + " feet and " + heightInches + " inches."); 
     System.out.println("Your weight is " + weight2 + " pounds."); 
     System.out.println("Your BMI is " + roundedbmi); 
     System.out.println("Your tobacco use is " + tobacco); 
    } 
} 

오류의 라인 (36)에서 발생 나는 아래 코드의 두 가지 소스를 게시합니다 컨트롤러 : 기호, 기호를 찾을 수 없습니다. tobaccoToggle

Answer 1

클래스 'BMWalculatorController'클래스에 'tobaccoToggle'필드를 정의해야합니다. 범위 문제로 인해 오류가 발생했습니다. 'handleToggleYesAction'의 코드에서 tobaccoToggle 변수가 호출되면 함수가 호출 될 때 만들어지고 함수가 끝나면 종료됩니다. 그리고 'handleToggleNoAction'에서 같은 문제가 발생했습니다.

다음은 코드입니다.

package bmi.calculator; 

import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.scene.control.TextField; 
import javafx.scene.control.ToggleGroup; 
import javafx.scene.text.Text; 

public class BMICalculatorController { 
    @FXML private Text outputText1; 
    @FXML private TextField ageBox; 
    @FXML private TextField heightBox; 
    @FXML private TextField weightBox; 
    private boolean tobaccoToggle; 

    @FXML protected void handleToggleYesAction(ActionEvent t) { 
     tobaccoToggle = true; 
    } 

    @FXML protected void handleToggleNoAction(ActionEvent t) { 
     tobaccoToggle = false; 
    } 

    @FXML protected void handleCalculateButtonAction(ActionEvent event) { 

     //obtains the variables we need to work with 
     boolean tobacco = tobaccoToggle; //error is here 
     double weight = Double.parseDouble(weightBox.getText()); 
     double height = Double.parseDouble(heightBox.getText()); 
     int age = Integer.parseInt(ageBox.getText()); 

     //Disregard everything else below here for now - I'll be changing it up some later. 
     //performs BMI calculation 
     double bmi; 
     double stepOne; 
     stepOne = weight/height; 
     double stepTwo; 
     stepTwo = stepOne/height; 
     bmi = stepTwo*703; 

     //round BMI to two decimal places 
     double roundedbmi = bmi; 
     roundedbmi = roundedbmi * 100; 
     roundedbmi = Math.round(roundedbmi); 
     roundedbmi = roundedbmi/100; 

     //transform height to feet and inches 
     int height2 = (int)Math.round(height); 
     int heightFeet = height2/12; 
     int heightInches = height2%12; 

     //transform weight to int 
     int weight2 = (int)Math.round(weight); 

     outputText1.setText("Your BMI is " + roundedbmi); 

     //tell the user what they enetered 
     System.out.println("Your height is " + heightFeet + " feet and " + heightInches + " inches."); 
     System.out.println("Your weight is " + weight2 + " pounds."); 
     System.out.println("Your BMI is " + roundedbmi); 
     System.out.println("Your tobacco use is " + tobacco); 
    } 
}