Java Antialiasing Help

[EAUX92yv]

I have been doing some Java work and watching tutorials. I am running into a problem: My program no longer runs. Can someone please point out my error to me?

import java.awt.*;
import javax.swing.JFrame;
public class Main extends JFrame {
	public static void main (String [] args){
		DisplayMode dm = new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN);
		Main m = new Main();
		m.run(dm);
	}
	public void run (DisplayMode dm){
		setBackground(Color.WHITE);
		setForeground (Color.BLACK);
		setFont(new Font("Arial", Font.PLAIN, 24));
		Screen s = new Screen();
		try{
			s.setFullScreen(dm, this);
			try{
				Thread.sleep(5000);
			}catch (Exception ex){}
		}finally{
			s.restoreScreen();
		}
	}
	public void paint (Graphics g) {
	if (g instanceof Graphics2D){
		Graphics2D g2 = (Graphics2D) g;
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
	}
	g.drawString("This is a test", 200, 200);
	}
}

import java.awt.*;
import javax.swing.JFrame;
public class Screen {
	private GraphicsDevice vc;
	public Screen (){
		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(Exception ex) {}
		}
	}
	public Window getFullScreenWindow(){
		return vc.getFullScreenWindow();
	}
	public void restoreScreen () {
		Window w = vc.getFullScreenWindow();
		if (w !=null){
			w.dispose();
		}
		vc.setFullScreenWindow(null);
	}
}

When I remove this if statement,

if (g instanceof Graphics2D){
		Graphics2D g2 = (Graphics2D) g;
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
	}

my program outputs fine. But with the if statement, I get a black screen for five seconds. Thanks in advance!

[N36fSL3A]

This would be better if you moved it to general C++ programming.

[Paoletti301]

not really considering it isnt c++

this is the perfect place for it

[N36fSL3A]

Meh. I guess so. But if it was me I'd do that.

[LB]

AFAIK both AWT and Swing are both deprecated in favor of JavaFX. Have you tried messing with JavaFX? I've used it and it's actually quite nice ;)

[coder777]

one problem might be on line 13. The misplaced ;

[LB]

Haha, a common argument for people who like opening braces on the same line is that it prevents that very mistake.

[EAUX92yv]

I tried removing that ;, but that didn't fix it. And this post should not have been in general C++, being that it is Java.

EDIT: Here is the program output:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Antialiased text mode is not compatible with Global antialiasing enable key
	at sun.java2d.SunGraphics2D.setRenderingHint(Unknown Source)
	at Main.paint(Main.java:26)
	at javax.swing.RepaintManager$3.run(Unknown Source)
	at javax.swing.RepaintManager$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.access$1000(Unknown Source)
	at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$200(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)