如何修改ControlsFX Notification背景：Java/CSS实现白背景改绿背景

Hey there! I’ve dealt with this exact issue before when customizing ControlsFX’s Notification component. Since it doesn’t expose a getStylesheet() method, we’ve got two solid ways to change that white background to green—let’s break them down:

This is quick and straightforward if you only need to customize a single Notification instance:

• First, create your Notification as usual, then grab its underlying Popup object using getPopup()
• Access the root content node of the Popup (it’s the first element in the content list)
• Apply the background color style directly to this node—you can also adjust text color to ensure readability against the green background

Here’s the code example:

// Create your Notification
Notification notification = Notification.create()
        .title("Custom Notification")
        .text("This has a green background!")
        .show();

// Wait for the popup to be shown before modifying styles (avoids null issues)
notification.getPopup().setOnShown(event -> {
    Node rootNode = notification.getPopup().getContent().get(0);
    // Set green background and white text
    rootNode.setStyle("-fx-background-color: #2ecc71; -fx-text-fill: white;");
    // If you need to target the inner label specifically:
    rootNode.lookup(".label").setStyle("-fx-text-fill: white;");
});

If you want all Notification instances in your app to have the green background, use a global CSS file. ControlsFX’s Notification uses the .notification CSS class for its root container, so we can target that:

First, create a CSS file (e.g., notification-styles.css) with these rules:

/* Target the Notification's root container */
.notification {
    -fx-background-color: #2ecc71; /* A nice green shade */
    -fx-border-color: #27ae60; /* Optional: add a darker green border */
    -fx-border-width: 2px;
}

/* Ensure text is readable on green background */
.notification .label {
    -fx-text-fill: white;
}

/* Customize the title label if needed */
.notification .title-label {
    -fx-text-fill: white;
    -fx-font-weight: bold;
}

Then, load this CSS file into your JavaFX application or scene:

// Option 1: Load for the entire application
Application.setUserAgentStylesheet(getClass().getResource("/notification-styles.css").toExternalForm());

// Option 2: Load for a specific Scene only
Scene scene = new Scene(new BorderPane());
scene.getStylesheets().add(getClass().getResource("/notification-styles.css").toExternalForm());

Just make sure your CSS file is placed correctly in your project’s resources folder so the getResource() call can find it.

内容的提问来源于stack exchange，提问作者code kiler