import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class ResizeWindowApp extends Application {

    @Override
    public void start(Stage primaryStage) {
        // Button
        Button button = new Button("Resize to 400x400");

        // On button click: try to resize
        button.setOnAction(e -> {
            primaryStage.setWidth(400);
            primaryStage.setHeight(400);
        });

        StackPane root = new StackPane(button);
        Scene scene = new Scene(root, 300, 300);

        // Set up stage
        primaryStage.setTitle("Resize Example");
        primaryStage.setScene(scene);
        primaryStage.setMinWidth(100);  // Optional: min size
        primaryStage.setMinHeight(100);
        primaryStage.setMaxWidth(300);  // Max size limit
        primaryStage.setMaxHeight(300);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(ResizeWindowApp.class, args);
    }
}