Change screen resolution in Java

Question

I have a program that uses visual scripting (sikuli-script) to allow the users to create their own visual scripts. The program needs to work across multiple systems that cou

Answer 1

Therefore is there a way that I can change the resolution settings in windows through java code?

1.yes is possible, why not

import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.image.BufferStrategy;

public class MultiBufferTest {

    private Frame mainFrame;
    private static Color[] COLORS = new Color[]{
        Color.red, Color.blue, Color.green, Color.white, Color.black,
        Color.yellow, Color.gray, Color.cyan, Color.pink, Color.lightGray,
        Color.magenta, Color.orange, Color.darkGray};
    private static DisplayMode[] BEST_DISPLAY_MODES = new DisplayMode[]{
        new DisplayMode(640, 480, 32, 0),
        new DisplayMode(640, 480, 16, 0),
        new DisplayMode(640, 480, 8, 0)};

    public MultiBufferTest(int numBuffers, GraphicsDevice device) {
        try {
            GraphicsConfiguration gc = device.getDefaultConfiguration();
            mainFrame = new Frame(gc);
            mainFrame.setUndecorated(true);
            mainFrame.setIgnoreRepaint(true);
            device.setFullScreenWindow(mainFrame);
            if (device.isDisplayChangeSupported()) {
                chooseBestDisplayMode(device);
            }
            Rectangle bounds = mainFrame.getBounds();
            mainFrame.createBufferStrategy(numBuffers);
            BufferStrategy bufferStrategy = mainFrame.getBufferStrategy();
            for (float lag = 2000.0f; lag > 0.00000006f; lag = lag / 1.33f) {
                for (int i = 0; i < numBuffers; i++) {
                    Graphics g = bufferStrategy.getDrawGraphics();
                    if (!bufferStrategy.contentsLost()) {
                        g.setColor(COLORS[i]);
                        g.fillRect(0, 0, bounds.width, bounds.height);
                        bufferStrategy.show();
                        g.dispose();
                    }
                    try {
                        Thread.sleep((int) lag);
                    } catch (InterruptedException e) {
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            device.setFullScreenWindow(null);
        }
    }

    private static DisplayMode getBestDisplayMode(GraphicsDevice device) {
        for (int x = 0; x < BEST_DISPLAY_MODES.length; x++) {
            DisplayMode[] modes = device.getDisplayModes();
            for (int i = 0; i < modes.length; i++) {
                if (modes[i].getWidth() == BEST_DISPLAY_MODES[x].getWidth()
                        && modes[i].getHeight() == BEST_DISPLAY_MODES[x].getHeight()
                        && modes[i].getBitDepth() == BEST_DISPLAY_MODES[x].getBitDepth()) {
                    return BEST_DISPLAY_MODES[x];
                }
            }
        }
        return null;
    }

    public static void chooseBestDisplayMode(GraphicsDevice device) {
        DisplayMode best = getBestDisplayMode(device);
        if (best != null) {
            device.setDisplayMode(best);
        }
    }

    public static void main(String[] args) {
        try {
            int numBuffers = 2;
            if (args != null && args.length > 0) {
                numBuffers = Integer.parseInt(args[0]);
                if (numBuffers < 2 || numBuffers > COLORS.length) {
                    System.err.println("Must specify between 2 and " + COLORS.length + " buffers");
                    System.exit(1);
                }
            }
            GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
            GraphicsDevice device = env.getDefaultScreenDevice();
            MultiBufferTest test = new MultiBufferTest(numBuffers, device);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.exit(0);
    }
}

2.don't do that, could annoying users, and on code lack can to change resolution in Native OS (my coworker has more than 100shortcuts on three screen, any change for resolution to change shotcuts size and location, result is simple mess)

3.use JLabel for Icons(layed with proper LayoutManager into container), or put Icons to the JList or JTable, then you never / don't care about something

4.use only LayoutManager rather than possitioning or change for screen resolution, you can set for smaller Size (for JFrame) on the screen for Apps start_up, let's user decide about final Dimmension on her/his screen