Detect Which Screen Monitor Your Coordinates Belong To Using Java

Posted by tech on November 23, 2009

Getting a screen’s size is simple using Toolkit class’ getScreenSize(). But what if you are working using more than 1 screen monitor, say a dual monitor? The ToolKit class won’t apply in this case. There are a few set of classes in Java that can do the trick namely GraphicsEnvironment and GraphicsDevice.

Let us say you have a coordinate and you want to know which screen monitor is belongs to (monitor 1 or monitor 2). This method will do just that.

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public static int getDisplayLocation(int x, int y) {
     GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
     GraphicsDevices[] gDevs = ge.getScreenDevices();
     Point p = new Point(x, y);
     for (int i=0; i