import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;

public class App extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        GridPane grid = new GridPane();
        grid.setVgap(10);
        grid.setHgap(10);
        grid.setPadding(new Insets(10, 10, 10, 10));

        Label baseLabel = new Label("Alap: ");
        GridPane.setConstraints(baseLabel, 0, 0);

        TextField baseInput = new TextField();
        GridPane.setConstraints(baseInput, 1, 0);

        Label heightLabel = new Label("Magasság: ");
        GridPane.setConstraints(heightLabel, 0, 1);

        TextField heightInput = new TextField();
        GridPane.setConstraints(heightInput, 1, 1);

        Button calcButton = new Button("Számít");
        GridPane.setConstraints(calcButton, 1, 2);

        grid.getChildren().addAll(baseLabel, baseInput, heightLabel, heightInput, calcButton);

        Scene scene = new Scene(grid, 300, 150);
        primaryStage.setScene(scene);

        primaryStage.show();
    }

}