How can I get screen resolution in java?

java, resolution, screen, swing

Solution

You can get the screen size with the `Toolkit.getScreenSize()` method.

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

On a multi-monitor configuration you should use this :

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`.

Resources :

- javadoc - Toolkit.getScreenSize()

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

Problem

How can one get the screen resolution (width x height) in pixels? I am using a JFrame and the java swing methods.

Original source