在 JAVA 中，使用 setDisplayMode 更改全屏应用程序的分辨率

I am running the code on a MacbookAir, running OSX Lion, with a screen resolution of 1440x900. The problem is, despite getting a blue background as I had expected, the text only appears on around upper left of the screen. The position of the text would continue to move down and right as I increase it's position until it reaches beyond 1440x900 when it disappears. I am guessing that the screen resolution is still set at 1440x900 as oppose to 800x600.

这是我的主要课程:

import java.awt.*;
import javax.swing.JFrame;

public class bucky extends JFrame {
    public static void main(String[] args){

        DisplayMode dm = new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN);
        bucky b = new bucky();
        b.run(dm);
    }

    public void run(DisplayMode dm){
        setBackground(Color.BLUE); // Setting background color
        setForeground(Color.WHITE);
        setFont(new Font("Arial", Font.PLAIN, 24));

        //The Screen variable is going to be a screen object
        Screen s = new Screen();
        try{
            s.setFullScreen(dm, this); //this refers to whatever object we are working on, ie 's'
            try{
                //Once it is set to full screen, and wait for 5 second
                Thread.sleep(5000);
            }catch(Exception ex){};
        }
        finally{
            s.restoreScreen();
        }
    }

    public void paint(Graphics g){
        g.drawString("Test", 400, 300);
    }

}

这里是 Screen 类的构造函数和 Screen 类的方法，它将应用程序设置为全屏

private GraphicsDevice vc; // Gives an interface to graphics card/video card.

public Screen(){
    //env is environment variable, containing all graphics manipulation objects
    GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();

    //When we get environment and getDegaultScreen Device, we get access to the entire monitor, not just a window
    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){}
        }

    }