Java FX BarChart가 원하는대로 작동하지 않습니다.

Question

주어진 기준에 따라 값을 표시하는 막대 차트 기반을 만들려고합니다. 어떻게 든 차트가 예상대로 작동하지 않습니다. 클릭 횟수에 따라 막대 수에 계속 추가됩니다. 아래 이미지를보십시오. 이 그래프를 생성하는 버튼 이벤트가 있으며 버튼을 클릭 한 횟수만큼 막대가 증가하고 있습니다.

package com.naveen; 

import javafx.collections.FXCollections; 
import javafx.collections.ObservableList; 
import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.geometry.Side; 
import javafx.scene.chart.BarChart; 
import javafx.scene.chart.CategoryAxis; 
import javafx.scene.chart.NumberAxis; 
import javafx.scene.chart.PieChart; 
import javafx.scene.chart.PieChart.Data; 
import javafx.scene.chart.XYChart; 
import javafx.scene.chart.XYChart.Series; 
import javafx.scene.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.TextField; 

public class AppController { 

    @FXML 
    Label total_energy_result, downstream_energy_result, upstream_energy_result, error; 
    @FXML 
    TextField temperature; 
    @FXML 
    TextField moisture; 
    @FXML 
    TextField natural_gas; 
    @FXML 
    TextField diesel; 
    @FXML 
    TextField light_fuel_gas; 
    @FXML 
    TextField lpg; 

    @FXML 
    PieChart chart; 

    @FXML 
    NumberAxis yAxis; 

    @FXML 
    CategoryAxis xAxis; 

    @FXML 
    BarChart<String, Double> bar_chart; 

    @FXML 
    Button calculate_total_energy, generate_chart; 

    private double downstream_energy; 
    private double natural_gas_percent; 
    private double diesel_percent; 
    private double light_fuel_gas_percent; 
    private double lpg_percent; 
    private double upstream_energy; 
    private double total_energy; 

    public void doStuff(ActionEvent e) { 

     calculate_total_energy.setOnAction(event -> { 
      downstream_energy = (26352.77 * Double.parseDouble(moisture.getText())) 
        + (537.98 * Double.parseDouble(temperature.getText())) - 32598.9; 
      natural_gas_percent = (Double.parseDouble(natural_gas.getText()) * 0.111868434193638)/100; 
      diesel_percent = (Double.parseDouble(diesel.getText()) * 0.16015875221474)/100; 
      light_fuel_gas_percent = (Double.parseDouble(light_fuel_gas.getText()) * 0.155217414842077)/100; 
      lpg_percent = (Double.parseDouble(lpg.getText()) * 0.0890627449471606)/100; 

      upstream_energy = downstream_energy 
        * (natural_gas_percent + diesel_percent + light_fuel_gas_percent + lpg_percent); 

      total_energy = downstream_energy + upstream_energy; 

      total_energy_result.setText(Math.round(total_energy) + " BTU"); 
      downstream_energy_result.setText(Math.round(downstream_energy) + " BTU"); 
      upstream_energy_result.setText(Math.round(upstream_energy) + " BTU"); 

      chart.setData(getData()); 
      chart.setClockwise(false); 
      chart.setLegendSide(Side.BOTTOM); 
      chart.setLabelsVisible(true); 
      chart.setLabelLineLength(10); 

      xAxis.setLabel("Fuel Type"); 
      yAxis.setLabel("%"); 

      XYChart.Series<String, Double> series1 = new Series<String, Double>(); 
      XYChart.Series<String, Double> series2 = new Series<String, Double>(); 
      XYChart.Series<String, Double> series3 = new Series<String, Double>(); 
      XYChart.Series<String, Double> series4 = new Series<String, Double>(); 

      series1.getData() 
        .add(new XYChart.Data<String, Double>("Natural", Double.parseDouble(natural_gas.getText()))); 
      series2.getData().add(new XYChart.Data<String, Double>("Diesel", Double.parseDouble(diesel.getText()))); 
      series3.getData() 
        .add(new XYChart.Data<String, Double>("Light Fuel", Double.parseDouble(light_fuel_gas.getText()))); 
      series4.getData().add(new XYChart.Data<String, Double>("LPG", Double.parseDouble(lpg.getText()))); 
      bar_chart.getData().addAll(series1,series2,series3,series4); 

     }); 
    } 

    private ObservableList<Data> getData() { 
     ObservableList<Data> observableList = FXCollections.observableArrayList(); 
     observableList.addAll(new PieChart.Data("DownStream", downstream_energy), 
       new PieChart.Data("UpStream", upstream_energy)); 
     return observableList; 
    } 

} 

Answer 1

다음은 코드를 수정 한 것입니다.

XYChart.Series<String, Double> series1 = new XYChart.Series<>(); 
    XYChart.Series<String, Double> series2 = new XYChart.Series<>(); 
    XYChart.Series<String, Double> series3 = new XYChart.Series<>(); 
    XYChart.Series<String, Double> series4 = new XYChart.Series<>(); 

      xAxis.setLabel("Fuel Type"); 
      yAxis.setLabel("%"); 

      series1.getData() 
        .add(new XYChart.Data<String, Double>("Natural", Double.parseDouble(natural_gas.getText()))); 
      series2.getData().add(new XYChart.Data<String, Double>("Diesel", Double.parseDouble(diesel.getText()))); 
      series3.getData() 
        .add(new XYChart.Data<String, Double>("Light Fuel", Double.parseDouble(light_fuel_gas.getText()))); 
      series4.getData().add(new XYChart.Data<String, Double>("LPG", Double.parseDouble(lpg.getText()))); 

      bar_chart.getData().add(series1); 
      bar_chart.getData().add(series2); 
      bar_chart.getData().add(series3); 
      bar_chart.getData().add(series4); 

      bar_chart.setLegendVisible(false);