在javafx网格窗格中添加不可见的行

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.stage.Stage;

public class GridPaneExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane gridPane = new GridPane();

        // 添加行约束
        RowConstraints rowConstraints1 = new RowConstraints();
        rowConstraints1.setPrefHeight(0); // 设置行高为0，使其不可见
        gridPane.getRowConstraints().add(rowConstraints1);

        RowConstraints rowConstraints2 = new RowConstraints();
        rowConstraints2.setPrefHeight(30); // 设置行高为30
        gridPane.getRowConstraints().add(rowConstraints2);

        // 添加控件
        Label label1 = new Label("可见行");
        gridPane.add(label1, 0, 1);

        Label label2 = new Label("不可见行");
        gridPane.add(label2, 0, 0);

        Scene scene = new Scene(gridPane, 200, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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