我正在练习使用JavaFX制作饼图。以下是开发饼图的代码。如果我使用Group和StackPane来制作，输出结果没有任何区别。我已经在代码中注释了使用Group的部分，只是好奇两者之间的区别。
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.scene.chart.PieChart.Data;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class ChartApp1 extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
PieChart pieChart = new PieChart();
//Group p=new Group();
pieChart.setData(getChartData());
primaryStage.setTitle("PieChart");
StackPane root = new StackPane();
root.getChildren().add(pieChart);
//p.getChildren().add(pieChart);
primaryStage.setScene(new Scene(root, 400, 250));
primaryStage.show();
}
private ObservableList<PieChart.Data> getChartData() {
ObservableList<PieChart.Data> answer = FXCollections.observableArrayList();
answer.addAll(new PieChart.Data("java", 17.56),
new PieChart.Data("C", 17.06),
new PieChart.Data("C++", 8.25),
new PieChart.Data("C#", 8.20),
new PieChart.Data("ObjectiveC", 6.8),
new PieChart.Data("PHP", 6.0),
new PieChart.Data("(Visual)Basic", 4.76),
new PieChart.Data("Other", 31.37));
return answer;
}
}