如何在OSX上使用Java进行全屏显示

I've been trying and failing to use the java full screen mode on the primary display of an OSX system. Whatever I've tried I can't seem to get rid of the 'apple' menu bar from the top of the display. I really need to paint over the entire screen. Can anyone tell me how to get rid of the menu?

我一直在尝试并且未能在OSX系统的主显示器上使用java全屏模式。无论我尝试过什么,我似乎都无法摆脱显示屏顶部的“苹果”菜单栏。我真的需要在整个屏幕上画画。谁能告诉我如何摆脱菜单?

I've attached an example class which exhibits the problem - on my system the menu is still visible where I would expect to see a completely blank screen.

我附上了一个展示问题的示例类 - 在我的系统上,菜单仍然可见,我希望看到一个完全空白的屏幕。

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

public class FullScreenFrame extends JFrame implements KeyListener {

    public FullScreenFrame () {
        addKeyListener(this);
        setUndecorated(true);
        GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

        if (gd.isFullScreenSupported()) {
            try {
                gd.setFullScreenWindow(this);
            }
            finally {
                gd.setFullScreenWindow(null);
            }
        }
        else {
            System.err.println("Full screen not supported");
        }

        setVisible(true);
    }

    public void keyTyped(KeyEvent e) {}
    public void keyPressed(KeyEvent e) {}
    public void keyReleased(KeyEvent e) {
        setVisible(false);
        dispose();
    }

    public static void main (String [] args) {
        new FullScreenFrame();
    }
}

3 个解决方案

#1

I think your problem is here:

我认为你的问题在这里:

try {
        gd.setFullScreenWindow(this);
}
finally {
        gd.setFullScreenWindow(null);
}

finally blocks are always executed, so what happens here is that you window becomes full screen for a brief instant (if that) and then relinquishes the screen immediately.

最后块总是被执行,所以这里发生的是你的窗口在短暂的瞬间变成全屏(如果那样),然后立即放弃屏幕。

Also, setVisible(true) is not necessary when you have previously called setFullScreenWindow(this), according to the Javadocs.

另外,根据Javadocs,如果之前调用过setFullScreenWindow(this),则不需要setVisible(true)。

So I would change the constructor to this:

所以我会将构造函数更改为:

public FullScreenFrame() {
    addKeyListener(this);

    GraphicsDevice gd =
            GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

    if (gd.isFullScreenSupported()) {
        setUndecorated(true);
        gd.setFullScreenWindow(this);
    } else {
        System.err.println("Full screen not supported");
        setSize(100, 100); // just something to let you see the window
        setVisible(true);
    }
}

#2

On OS X (10.7 and higher), it is better to use the native fullscreen mode available. You should use:

在OS X(10.7及更高版本)上,最好使用可用的本机全屏模式。你应该使用:

com.apple.eawt.FullScreenUtilities.setWindowCanFullScreen(window,true);
com.apple.eawt.Application.getApplication().requestToggleFullScreen(window);

where window is the window (JFrame, etc) that you want to take fullscreen

其中window是您要全屏拍摄的窗口(JFrame等)

#3

Thats a bit pedantic, the answer is to follow the tutorial completely, which has the essentials and is somewhat more expansive than would fit in a post. The above sample does not work because it is missing a validate(); and some content. I suspect the Java Tutorial will not disappear any time soon. Below is a modified version

这有点迂腐,答案是完全遵循教程,它具有基本功能,并且比在帖子中更适合扩展。上面的示例不起作用,因为它缺少validate();和一些内容。我怀疑Java Tutorial不会很快消失。以下是修改后的版本

package test;

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

public class FullScreenFrame extends JFrame implements KeyListener {

    public FullScreenFrame () {
        addKeyListener(this);
        setUndecorated(true);
        GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

    if (gd.isFullScreenSupported()) {
        try {
            this.getContentPane().addKeyListener(this);
            this.getContentPane().setLayout(new BorderLayout());
            this.getContentPane().add("Center", new JLabel("Full Screen, back to normal in 10 seconds"));
            gd.setFullScreenWindow(this);
            validate();
            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } finally {
            gd.setFullScreenWindow(null);
        }
    } else {
        System.err.println("Full screen not supported");
    }

}

public void keyTyped(KeyEvent e) {
    System.out.println("keyTyped:" +  e.getKeyChar() + "source:"  + e.getSource() );
}
public void keyPressed(KeyEvent e) {
    System.out.println("keyPressed:" + e.getKeyChar() + "source:"  + e.getSource() );
}
public void keyReleased(KeyEvent e) {
    System.out.println("keyReleased:" + e.getKeyChar() + "source:"  + e.getSource() );
       setVisible(false);
        dispose();
    }

    public static void main (String [] args) {
        new FullScreenFrame();
    }
}

#1