In this example we are going to see how to retrieve information about the display of your device. You can use this in your application in order to present to the user all the information he needs to know about the display he is working on.
Basically to retrieve display information for your device, you should follow these steps:
- Use
GraphicsEnvironment.getLocalGraphicsEnvironment()to get the graphics information of your device. - Use
GraphicsEnvironment.getScreenDevicesto get the screen devices of your system. This will return you an array ofGraphicsDevice. - You can now iterate through the array and use
graphicsDevices[i].getIDstring()to get the id of each display device. - Use
graphicsDevices[i].getDisplayModes()to get the display modes of this specific device in the array. This will return you an rray ofDisplayModeobjects concerning this specific device. - You can iterate through that array and use
displayModes[j].getWidth(),displayModes[j].getHeight(),displayModes[j].getBitDepth(),displayModes[j].getRefreshRate(), to get all the crucial information about the device.
Let’s see the code:
package com.javacodegeeks.snippets.desktop;
import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class DisplayInfo {
public static void main(String[] args) {
GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] graphicsDevices = graphicsEnvironment.getScreenDevices();
for (int i=0; i<graphicsDevices.length; i++) {
System.out.println("Graphics device " + graphicsDevices[i].getIDstring());
DisplayMode[] displayModes = graphicsDevices[i].getDisplayModes();
for (int j=0; j<displayModes.length; j++) {
int screenWidth = displayModes[j].getWidth();
int screenHeight = displayModes[j].getHeight();
int bitDepth = displayModes[j].getBitDepth();
int refreshRate = displayModes[j].getRefreshRate();
System.out.println("Display mode : " + j + "nScreen Width : "+ screenWidth + "nScreen Height : " + screenHeight + "nBitDepth : " + (bitDepth==DisplayMode.BIT_DEPTH_MULTI?"Multi":bitDepth) + "nRefresh rate : " + (refreshRate==DisplayMode.REFRESH_RATE_UNKNOWN?"Unknown":refreshRate) + "n");
}
}
}
}Example Output:
Graphics device :0.0
Display mode : 0
Screen Width : 1280
Screen Height : 1024
BitDepth : Multi
Refresh rate : Unknown
Graphics device :0.1
Display mode : 0
Screen Width : 1280
Screen Height : 800
BitDepth : Multi
Refresh rate : Unknown
This was an example on how to retrieve display device information.
