全屏框架问题 [英] Full screen frame issue

问题描述

我有这段代码，基本上可以初始化一个新的JFrame并将其设置为全屏显示

I have this code, which basically initializes a new JFrame and sets it full screen

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();
    }
}

问题在于它有时可以正常工作，有时却不能正常工作，尤其是在Ubuntu上:有时我会全屏查看它，有时会显示两个条.我想念什么?

The problem is that it sometimes it does work and sometimes it doesn't, especially with Ubuntu: sometimes i see it full screen, sometimes the two bars are shown. What am i missing?

更新

有一个屏幕截图:

推荐答案

请确保使用

Make sure to build your GUI on the event dispatch thread with invokeLater().

更新:这是一个 SSCCE ，它似乎可以正常工作.

Update: Here's an SSCCE that seems to work consistently.

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();
            }
        });
    }
}

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