Java active displays

Window myWindow = ....
// ...
GraphicsConfiguration config = myWindow.getGraphicsConfiguration();
GraphicsDevice myScreen = config.getDevice();
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
// AFAIK - there are no guarantees that screen devices are in order... 
// but they have been on every system I've used.
GraphicsDevice[] allScreens = env.getScreenDevices();
int myScreenIndex = -1;
for (int i = 0; i < allScreens.length; i++) {
    if (allScreens[i].equals(myScreen))
    {
        myScreenIndex = i;
        break;
    }
}
System.out.println("window is on screen" + myScreenIndex);

Source: stackoverflow.com

Java active displays

    public static GraphicsDevice getWindowDevice(Window window) {
    Rectangle bounds = window.getBounds();
    return asList(GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()).stream()

            // pick devices where window located
            .filter(d -> d.getDefaultConfiguration().getBounds().intersects(bounds))

            // sort by biggest intersection square
            .sorted((f, s) -> Long.compare(//
                    square(f.getDefaultConfiguration().getBounds().intersection(bounds)),
                    square(s.getDefaultConfiguration().getBounds().intersection(bounds))))

            // use one with the biggest part of the window
            .reduce((f, s) -> s) //

            // fallback to default device
            .orElse(window.getGraphicsConfiguration().getDevice());
}

public static long square(Rectangle rec) {
    return Math.abs(rec.width * rec.height);
}

Source: stackoverflow.com

Similar codes

6 votes378 views2 answers
Get absolute path from relative java
Java
0 vote400 views1 answer
Code for fibonacci numbers using For loop in Java
Java
0 vote364 views1 answer
Run jar with logback config file
Java
0 vote425 views1 answer
Jframe open another frame using button actionlistener
Java
0 vote345 views1 answer
Intent from notification with extra to activity
Java
0 vote322 views1 answer
Which package contains the Math classin java?
Java
0 vote346 views1 answer
Java 8 stream option
Java
0 vote352 views1 answer
What does java.util.scanner mean
Java
0 vote354 views2 answers
Java find index of first alpha character in string
Java
0 vote371 views1 answer
Do not concatenate text displayed with setText. Use resource string with placeholders.
Java