Fetching screen resolution using Java

Question

Can someone guide me how can I fetch the screen resolution (width x height) in pixels using a JFrame and Java swing methods?

Answer 1

You can fetch the screen resolution using the Toolkit.getScreenSize() method of Java. Try following the below code:

Dimension screenRes = Toolkit.getDefaultToolkit().getScreenSize();
double width = screenRes.getWidth();
double height = screenRes.getHeight();

If you have a multi-monitor configuration, you need to use the following :

GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
int width = gd.getDisplayMode().getWidth();
int height = gd.getDisplayMode().getHeight();

If you want to get the screen resolution in DPI you'll have to use the getScreenResolution() method on Toolkit.

For more info you can refer below:

• javadoc - Toolkit.getScreenSize()
• Java bug 5100801- Toolkit.getScreenSize() does not return the correct dimension on multimon, linux

Hope this helps!

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Thanks!