isFullScreenSupported对于监视器始终为true [英] isFullScreenSupported always true for monitors

问题描述

给出以下代码

 GraphicsDevice screen = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0];
 if (screen.isFullScreenSupported()) {
      //is it always true for monitors?
 }

screen.isFullScreenSupported()是否始终适用于监视器?

Is screen.isFullScreenSupported() always true for monitors?

推荐答案

否，可能不正确.

SecurityManager可能不允许您使用全屏控制.主要是因为人们可以轻易地伪造整个屏幕，以便从不怀疑的用户那里获取密码(您可以嘲笑银行网站).

The SecurityManager might disallow you the full screen control. Mainly because one could easily fake whole screen in order to grab a password from not-suspecting user (you could mock a bank website).

它可以是错误的:

• 在小程序中
• 在WebStart应用程序中
• 在无头模式下运行

JavaDOC:

JavaDOC of GraphicsDevice.isFullScreenSupported:

如果此GraphicsDevice支持全屏独占，则返回true 模式.如果安装了SecurityManager，则其checkPermission方法 将使用AWTPermission("fullScreenExclusive")进行调用. isFullScreenSupported仅在授予该权限的情况下返回true

Returns true if this GraphicsDevice supports full-screen exclusive mode. If a SecurityManager is installed, its checkPermission method will be called with AWTPermission("fullScreenExclusive"). isFullScreenSupported returns true only if that permission is granted

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