How do I get the screen resolution in Java?

Getting Screen Resolution in Java

In Java, there are several methods to obtain the screen resolution, which represents the width and height of the display area in pixels.

By leveraging the Toolkit class, you can retrieve the overall screen size or target specific monitors in a multi-monitor setup. Here's how you can accomplish this:

Getting Overall Screen Resolution

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

Targeting a Specific Monitor

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

Retrieving DPI

double resolution = Toolkit.getDefaultToolkit().getScreenResolution();

Conclusion

These methods provide flexible ways to access the screen resolution in Java, whether it's for managing window positions, optimizing image rendering, or any other display-related purpose.

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