JavaFX选项卡将进程指示器设置为标题

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class JavaFXTabWithProgressIndicator extends Application {

    @Override
    public void start(Stage primaryStage) {
        TabPane tabPane = new TabPane();

        // 创建第一个选项卡
        Tab tab1 = new Tab("Tab 1");
        tab1.setClosable(false);

        // 创建进程指示器和标题
        ProgressIndicator progressIndicator1 = new ProgressIndicator();
        Label label1 = new Label("Loading...");
        VBox vbox1 = new VBox(progressIndicator1, label1);
        vbox1.setAlignment(Pos.CENTER);
        tab1.setGraphic(vbox1);

        // 创建第二个选项卡
        Tab tab2 = new Tab("Tab 2");
        tab2.setClosable(false);

        // 创建进程指示器和标题
        ProgressIndicator progressIndicator2 = new ProgressIndicator();
        Label label2 = new Label("Saving...");
        VBox vbox2 = new VBox(progressIndicator2, label2);
        vbox2.setAlignment(Pos.CENTER);
        tab2.setGraphic(vbox2);

        tabPane.getTabs().addAll(tab1, tab2);

        Scene scene = new Scene(tabPane, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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