This Swing Java Tutorial describes developing graphical user interfaces (GUIs). Click the Launch button to run the TranslucentWindowDemo example using Java™. Invoking setBackground(new Color(0,0,0,0)) on the window causes the.

Try this: Click the Launch button to run the TranslucentWindowDemo example using. This example requires or later. Alternatively, to compile and run the example yourself, consult the. • You can create a window with per-pixel translucency, where each pixel has its own alpha value.

With this feature you can, for example, create a window that fades away to nothing by defining a gradient in the alpha values. The following screen capture shows a window with gradient translucency from the top (fully translucent) to the bottom (fully opaque). Try this: Click the Launch button to run the ShapedWindowDemo example using. This example requires or later. Alternatively, to compile and run the example yourself, consult the.

Not all platforms support all of these capabilities. An UnsupportedOperationException exception is thrown when code attempts to invoke the setShape or setOpacity methods on a platform that does not support these capabilities. Therefore, it is best practice to first check that the platform supports the capability that you want to implement. The GraphicsDevice class provides the method that you can use for this purpose.

You pass one of three enum values, defined in, to this method: • TRANSLUCENT – The underlying platform supports windows with uniform translucency, where each pixel has the same alpha value. • PERPIXEL_TRANSLUCENT – The underlying platform supports windows with per-pixel translucency. This capability is required to implement windows that fade away. • PERPIXEL_TRANSPARENT – The underlying platform supports shaped windows. The GraphicsConfiguration class also provides the method to determine if PERPIXEL_TRANSLUCENT translucency is supported by the given GraphicsConfiguration object.

Import static java.awt.GraphicsDevice.WindowTranslucency.*; // Determine what the default GraphicsDevice can support. Ntfs for mac. GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice gd = ge.getDefaultScreenDevice(); boolean isUniformTranslucencySupported = gd.isWindowTranslucencySupported(TRANSLUCENT); boolean isPerPixelTranslucencySupported = gd.isWindowTranslucencySupported(PERPIXEL_TRANSLUCENT); boolean isShapedWindowSupported = gd.isWindowTranslucencySupported(PERPIXEL_TRANSPARENT). Note: None of these capabilities work on windows in full-screen mode. Invoking any of the relevant methods while in full-screen mode causes an IllegalComponentStateException exception to be thrown.

You can create a window where each pixel has the same translucency by invoking the method in the Window class. The float argument passed to this method represents the translucency of the window and should be a value between 0 and 1, inclusive. The smaller the number, the more transparent the window. There is also a corresponding method. The example creates a window that is 55 percent opaque (45 percent translucent).