Java 13 の新しい JavaFX レイアウト コンポーネントを使用して複雑なユーザー インターフェイスを実装する

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class FlowPaneExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        FlowPane flowPane = new FlowPane();
        flowPane.setPadding(new Insets(20));
        flowPane.setVgap(10);
        flowPane.setHgap(10);

        Button button1 = new Button("Button 1");
        Button button2 = new Button("Button 2");
        Button button3 = new Button("Button 3");

        flowPane.getChildren().addAll(button1, button2, button3);

        Scene scene = new Scene(flowPane, 400, 300);
        
        primaryStage.setScene(scene);
        primaryStage.setTitle("FlowPane Example");
        primaryStage.show();
    }

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

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.ColumnConstraints;
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();
        gridPane.setHgap(10);
        gridPane.setVgap(10);

        ColumnConstraints column1 = new ColumnConstraints(100);
        ColumnConstraints column2 = new ColumnConstraints(100);

        RowConstraints row1 = new RowConstraints(50);
        RowConstraints row2 = new RowConstraints(50);

        gridPane.getColumnConstraints().addAll(column1, column2);
        gridPane.getRowConstraints().addAll(row1, row2);

        Button button1 = new Button("Button 1");
        Button button2 = new Button("Button 2");
        Button button3 = new Button("Button 3");
        Button button4 = new Button("Button 4");

        gridPane.add(button1, 0, 0);
        gridPane.add(button2, 1, 0);
        gridPane.add(button3, 0, 1);
        gridPane.add(button4, 1, 1);

        Scene scene = new Scene(gridPane, 400, 300);

        primaryStage.setScene(scene);
        primaryStage.setTitle("GridPane Example");
        primaryStage.show();
    }

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