回答編集履歴

  いろいろやり方はありますが、わかりやすそうなのはこうでしょうか。

 

  ```Java

  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.stage.Stage;

 

  public class PieChartSample extends Application {

  @Override

  public void start(Stage stage) {

  Scene scene = new Scene(new Group());

  stage.setTitle("Imported Fruits");

  stage.setWidth(500);

  stage.setHeight(500);

 

  ObservableList<PieChart.Data> pieChartData = FXCollections.observableArrayList();

  int[] pa = new int[]{ 1, 2, 3 };

 

  for (int i = 0; i < pa.length; i++) {

  pieChartData.add(new PieChart.Data(Integer.toString(i), pa[i]));

  }

 

  final PieChart chart = new PieChart(pieChartData);

  chart.setTitle("Imported Fruits");

 

  ((Group) scene.getRoot()).getChildren().add(chart);

  stage.setScene(scene);

  stage.show();

  }

 

  public static void main(String[] args) {

  launch(args);

  }

  }

  ```