java - 全屏边框问题

Question

我有这段代码，它基本上初始化一个新的 JFrame 并将其设置为全屏

public class FullScreenFrameTest extends JFrame {

    public FullScreenFrameTest() {
        super();
        initFrame();
        setVisible(true);

        //full screen
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice device = env.getDefaultScreenDevice();
        device.setFullScreenWindow(this);
        //end full screen
    }

    public void initFrame() {
        Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setUndecorated(true);
        setLocation(0, 0); //tried removing this, still doesn't work
        setSize(screen.width, screen.height);
    }

    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception e) {
        }
        new FullScreenFrameTest();
    }
}

问题是它有时能工作，有时不能，特别是在 Ubuntu 上:有时我看到它是全屏的，有时会显示两个栏。我错过了什么？

更新

有截图:

Answer 1

确保使用 invokeLater() 在事件分派(dispatch)线程上构建 GUI .

更新:这是 SSCCE这似乎始终有效。

import java.awt.EventQueue;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class FullScreenFrameTest extends JFrame {

    public FullScreenFrameTest() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setUndecorated(true);
        add(new JLabel("Test", JLabel.CENTER));
        GraphicsEnvironment env =
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice device = env.getDefaultScreenDevice();
        device.setFullScreenWindow(this);
        setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                new FullScreenFrameTest();
            }
        });
    }
}