import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
public static void main(String[] argv) throws Exception {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
for (int i = 0; i < gs.length; i++) {
DisplayMode dm = gs[i].getDisplayMode();
int refreshRate = dm.getRefreshRate();
if (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) {
System.out.println("Unknown rate");
}
int bitDepth = dm.getBitDepth();
int numColors = (int) Math.pow(2, bitDepth);
}
}
}