In JavaFX, the PieChart control is used to create a pie chart that displays data as a series of slices, where the size of each slice represents the value of the corresponding data point.

Here's an example of how to create a simple pie chart in JavaFX:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.PieChart;
import javafx.stage.Stage;

public class PieChartExample extends Application {
    @Override
    public void start(Stage stage) {
        // Define the pie chart data
        PieChart.Data slice1 = new PieChart.Data("Jan", 23);
        PieChart.Data slice2 = new PieChart.Data("Feb", 14);
        PieChart.Data slice3 = new PieChart.Data("Mar", 15);
        PieChart.Data slice4 = new PieChart.Data("Apr", 24);
        PieChart.Data slice5 = new PieChart.Data("May", 34);
        PieChart.Data slice6 = new PieChart.Data("Jun", 36);
        PieChart.Data slice7 = new PieChart.Data("Jul", 22);

        // Create the pie chart and add the data
        PieChart pieChart = new PieChart();
        pieChart.getData().addAll(slice1, slice2, slice3, slice4, slice5, slice6, slice7);

        // Set the chart title
        pieChart.setTitle("Pie Chart Example");

        // Create the scene and show the chart
        Scene scene = new Scene(pieChart, 800, 600);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

In this example, we create a PieChart control and add data to it using the getData() method. Each slice of the pie is represented by a PieChart.Data object, which takes a label and a value as parameters. We then set the chart title and display the chart in a Scene. When the application is run, the pie chart will be displayed with the slices representing the data points.

JavaFX PieChart control provides a lot of customization options, such as styling the chart and its components, handling user interactions, and supporting animation. With these features, developers can create advanced and interactive pie charts for their JavaFX applications.