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我试图创建一个基于条形图的图表，显示基于给定条件的值。不知何故，图表并不像我预期的那样。取决于我点击的次数，它会一直添加到条的数量。请看下面的图片。有一个按钮事件会生成此图形，并且条形按照单击按钮的次数增加。 
Java FX BarChart无法正常工作
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;
}
}
您似乎是在动作侦听器中设置动作侦听器*（取决于FXML文件中的内容）。然后在该动作侦听器中，您将四个新系列添加到条形图中的现有系列。如果你解释了你实际上想要做的事情，也许它会有所帮助，因为这似乎是预期的行为。 –
我从方法签名中删除了该ActionEvent。现在，想法是显示xAxis上的燃料类型及其在yAxis上的值。我有四类燃料类型。请让我知道如何去做。 –
如果删除参数，则不会有任何区别。它仍然是一个动作处理器方法，不是吗？不确定你想要做什么。 –