JavaFX: Create Multiple Windows (Double Windows) - Guide

To achieve double windows in JavaFX, you can follow these steps:
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1. Create a new JavaFX project in your preferred IDE.
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2. In the main class, extend the `javafx.application.Application` class and override the `start()` method.
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import javafx.application.Application;\
import javafx.scene.Scene;\
import javafx.scene.control.Button;\
import javafx.scene.layout.StackPane;\
import javafx.stage.Stage;\
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public class DoubleWindows extends Application {\
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    @Override\
    public void start(Stage primaryStage) {\
        // Create the first window\
        StackPane root1 = new StackPane();\
        Button button1 = new Button("Open Second Window");\
        root1.getChildren().add(button1);\
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        Scene scene1 = new Scene(root1, 300, 200);\
        primaryStage.setTitle("First Window");\
        primaryStage.setScene(scene1);\
        primaryStage.show();\
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        // Create the second window\
        Stage secondaryStage = new Stage();\
        StackPane root2 = new StackPane();\
        Button button2 = new Button("Close Second Window");\
        root2.getChildren().add(button2);\
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        Scene scene2 = new Scene(root2, 300, 200);\
        secondaryStage.setTitle("Second Window");\
        secondaryStage.setScene(scene2);\
        secondaryStage.show();\
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        // Handle button actions\
        button1.setOnAction(e -> secondaryStage.show());\
        button2.setOnAction(e -> secondaryStage.close());\
    }\
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    public static void main(String[] args) {\
        launch(args);\
    }\
}\
```\
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3. In the \`start()\` method, create two instances of the \`Stage\` class. These will represent your windows.\
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4. Create the necessary UI components for each window and add them to their respective root layout (e.g., \`StackPane\`).\
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5. Create \`Scene\` objects for both windows, specifying the root layout and the desired width and height.\
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6. Set the title of each window using \`stage.setTitle("Window Title")\`.\
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7. Set the scene of each window using \`stage.setScene(scene)\`.\
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8. Show both windows using \`stage.show()\`.\
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9. Handle button actions to control the visibility of the second window. In the example above, clicking the \"Open Second Window\" button on the first window will show the second window, and clicking the \"Close Second Window\" button on the second window will close it.\
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10. Run the application and you should see two windows displayed.