How to get the width and height of current monitor in java

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.

Here is your answer: http://stackoverflow.com/questions/3680221/how-can-i-get-the-monitor-size-in-java — MuGiK, Dec 11 '14 at 09:33
Hi MuGiK, thanks.. I need the resolution of current monitor in use. It gives me default device and not current device I believe. Please help me identifying the size of current monitor in use and not default monitor. GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(); — sridhar, Dec 11 '14 at 09:35

score 1 · Answer 1 · edited Dec 11 '14 at 09:48

1

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();

edited Dec 11 '14 at 09:48

pherris

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answered Dec 11 '14 at 09:39

MuGiK

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how do u identify current monitor .. MuGik. – sridhar Dec 11 '14 at 09:41
'n' is the index of the monitor – MuGiK Dec 11 '14 at 09:42
thanks .. MuGik. I will re-arrange my question. I need to find size of current monitor in use. – sridhar Dec 11 '14 at 09:44

score 1 · Answer 2 · answered Dec 11 '14 at 09:48

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();

score 0 · Answer 3 · answered Dec 11 '14 at 09:37

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

GraphicsDevice.getLocalGraphicsEnvironment().getScreenDevices()

and know them resolutions

answered Dec 11 '14 at 09:37

cybersoft

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thanks... cybersoft.. I need the current device and not default device. how do i find it. – sridhar Dec 11 '14 at 09:37
I think it is not possible to know on which device are located your application. – cybersoft Dec 11 '14 at 09:39
You can also look at this example: https://docs.oracle.com/javase/7/docs/api/java/awt/GraphicsDevice.html – cybersoft Dec 11 '14 at 09:49

score 0 · Answer 4 · answered Dec 11 '14 at 09:46

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();

How to get the width and height of current monitor in java

4 Answers4