Java Swing - 如何更改显示模式

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import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class Main {
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setSize(800, 600);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment()
        .getDefaultScreenDevice();
    device.setFullScreenWindow(frame);
    device.setDisplayMode(new DisplayMode(800, 600, 32, 60));
    frame.setVisible(true);
    JButton btn = new JButton();
    btn.setText("Button");
    JPanel panel = new JPanel();
    panel.add(btn);
    frame.add(panel);
    btn.addActionListener(e->{
        JOptionPane.showMessageDialog(frame.getContentPane(), "JOptionPane");
    });
  }
}
 
 
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