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javamultiple-monitors

Java - Detecting the main monitor

I'd like to know if it's possible to detect the main monitor of a computer in Java, and if so I'd like to know how to(I.e. code example).

Solution

  • If you have an JFrame running, the following will give you the list of devices:

    GraphicsEnvironment gEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] dDevices= gEnvironment.getScreenDevices();

    Not sure, but the first one should be the default one.

    You can also try:

    GraphicsEnvironment gEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice dDevice= gEnvironment.getDefaultScreenDevice();

    Which returns the default screen device.