java - 我在 setConstraints(button,0,0); 中遇到错误 孩子在红色下划线

Question

编码

    AnchorPane Anchorpane = new AnchorPane();
    BorderPane BorderPane = new BorderPane();
    GridPane gridPane= new GridPane();
    gridPane.setPadding(new Insets( 10, 10, 10,10));
    gridPane.setVgap(7);
    gridPane.setHgap(10);

    Button b1 = new Button("1");
    gridPane.setConstraints(b1,0,0);


    primaryStage.show();

输入行和列值后，孩子变红了

标签： java