如何在Java中获取当前监视器的宽度和高度

Question

how to get width and height of screen of current monitor in multimonitor scenarios in java.

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

This piece of code gives the width and height of same monitor even if I run in other monitor.

How do you get the width and height of current monitor. Please help.

Answer 1

It depends on what you mean by the current screen. If it is the screen where the mouse cursor is, you can get the device with:

GraphicsDevice gd = MouseInfo.getPointerInfo().getDevice();

On the other hand, if you need the device where a window is located, use:

GraphicsDevice gd = frame.getGraphicsConfiguration().getDevice();

From these you can obtain the dimensions:

int width = gd.getDisplayMode().getWidth();
int height = gd.getDisplayMode().getHeight();

Answer 2

In addition to the comment, you may obtain all available monitors:

GraphicsDevice.getLocalGraphicsEnvironment().getScreenDevices()

and know them resolutions

Answer 3

Try:

GraphicsDevice gd[] = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();

Then you'll have all your monitor in the array.

Now get width and height:

int width = gd[n].getDisplayMode().getWidth();
int height = gd[n].getDisplayMode().getHeight();

Answer 4

You can get screen dimensions using Toolkit as follows:

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

For multi-screen try following:

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