用标签填充网格窗格

Question

我有这个构造函数，我正在尝试用标签填充网格窗格。我撞到了一堵砖墙，不知道出了什么问题。我需要在 1 行中创建 13 个标签。

构造 函数：

public class Labels {
   @FXML
    GridPane gridPane = new GridPane();
    public Labels(String labelname, int columnIndex, int rowIndex) {
        Label label = new Label();
        gridPane.setColumnIndex(label, columnIndex);
        gridPane.setRowIndex(label, rowIndex);
        label.setId(labelname+columnIndex);
        label.setVisible(true);
        label.setText("test");
    }   
}

控制器中的回路：

for(int i2=0; i2<13; i2++){
        Labels labels = new Labels("label", i2, 3);
 }

Answer 1

您没有将Label s添加到GridPane 中。此外，您为每个Label都使用新的GridPane，并且从不在任何地方使用这些GridPane。

public class Labels {
    private GridPane gridPane = new GridPane();
    public GridPane getGridPane() {
        return gridPane; 
    }
    public void addLabel(String labelname, int columnIndex, int rowIndex) {
        Label label = new Label();
        GridPane.setColumnIndex(label, columnIndex);
        GridPane.setRowIndex(label, rowIndex);
        label.setId(labelname+columnIndex);
        label.setText("test");
        gridPane.getChildren().add(label);
    }   
}

Labels labels = new Labels();
for(int i2=0; i2<13; i2++){
    labels.addLabel("label", i2, 3);
}
GridPane gridPane = labels.getGridPane();
// TODO: display gridPane

Answer 2

(总是发布一个mcve(

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class LabelsRow extends Application {
    GridPane gridPane;
    @Override
    public void start(Stage primaryStage) {
        gridPane = new GridPane();
        for(int i2=0; i2<13; i2++){
            new Labels("label "+i2 , i2, 3);
        }
        Scene scene = new Scene(gridPane);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    public class Labels {
        Labels labels;
        Labels(String labelname, int columnIndex, int rowIndex) {
            Label label = new Label();
            //gridPane.setColumnIndex(label, columnIndex);
            //gridPane.setRowIndex(label, rowIndex);
            gridPane.add(label, columnIndex, rowIndex);
            label.setId(labelname+columnIndex);
            label.setVisible(true);
            label.setText(labelname);
        }
    }
    public static void main(String[] args) {
        launch(args);
    }
}