Question

I have a fullscreen JFrame that I developed on my MacBook, and it worked great. The background was able to change colors and stuff. Now I moved it over to my Windows box and the background is white, and it doesn’t seem to want to change when I tell it to. Why could that be?

This is the code for setting up my windows (in a nutshell):

JFrame frame;
DisplayMode dm;
frame = new JFrame();
frame.setBackground(new Color(0.3F, 0.3F, 0.3F));
dm = new DisplayMode(Main.width, Main.height, 32, DisplayMode.REFRESH_RATE_UNKNOWN);
screen = new ScreenManager();
screen.setFullScreen(dm, frame);

This is the code for setting JFrames fullscreen.

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Window;

import javax.swing.JFrame;

public class ScreenManager
{
    public static GraphicsDevice vc;

    public ScreenManager()
    {
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        vc = env.getDefaultScreenDevice();
    }

    public void setFullScreen(DisplayMode dm, JFrame window)
    {
        window.setUndecorated(true);
        window.setResizable(false);
        vc.setFullScreenWindow(window);
        if (dm != null && vc.isDisplayChangeSupported())
        {
            try
            {
                vc.setDisplayMode(dm);
            }
            catch (IllegalArgumentException e)
            {
                //No need to do anything.
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
        }
    }
}

Answer 1

The only thing I could think of is the JFrame is being set to a color–this won’t do anything.

Try this

JFrame frame = new JFrame();
frame.getContentPane().setBackground(new Color(0.3F, 0.3F, 0.3F));

You’d be setting the color of the pane itself instead of just the Frame.