Java AWT需要X11，如何使用xvfb (ubuntu 14.04)

Question

我有一个需要X11显示变量的java应用程序，我得到的异常是：

    Caused by: java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
        at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)
        at java.awt.Window.<init>(Window.java:536)
        at java.awt.Frame.<init>(Frame.java:420)

我已经在ubuntu机器上安装了Xvfb：

root      1470  1469  0 02:40 pts/3    00:00:00 Xvfb :1 -screen 0 1152x900x8

但是我仍然得到这个错误。

当我启动Xvfb时，我得到了以下响应：

Initializing built-in extension Generic Event Extension
Initializing built-in extension SHAPE
Initializing built-in extension MIT-SHM
Initializing built-in extension XInputExtension
Initializing built-in extension XTEST
Initializing built-in extension BIG-REQUESTS
Initializing built-in extension SYNC
Initializing built-in extension XKEYBOARD
Initializing built-in extension XC-MISC
Initializing built-in extension SECURITY
Initializing built-in extension XINERAMA
Initializing built-in extension XFIXES
Initializing built-in extension RENDER
Initializing built-in extension RANDR
Initializing built-in extension COMPOSITE
Initializing built-in extension DAMAGE
Initializing built-in extension MIT-SCREEN-SAVER
Initializing built-in extension DOUBLE-BUFFER
Initializing built-in extension RECORD
Initializing built-in extension DPMS
Initializing built-in extension Present
Initializing built-in extension DRI3
Initializing built-in extension X-Resource
Initializing built-in extension XVideo
Initializing built-in extension XVideo-MotionCompensation
Initializing built-in extension SELinux
Initializing built-in extension GLX
[dix] Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
[dix] Could not init font path element /usr/share/fonts/X11/100dpi/:unscaled, removing from list!
[dix] Could not init font path element /usr/share/fonts/X11/75dpi/:unscaled, removing from list!
[dix] Could not init font path element /usr/share/fonts/X11/Type1, removing from list!
[dix] Could not init font path element /usr/share/fonts/X11/100dpi, removing from list!
[dix] Could not init font path element /usr/share/fonts/X11/75dpi, removing from list!

它没有返回给我，所以我按下'CTRL + C‘来取回控制权，但在查看'ps aux | grep Xvfb’之后，我可以看到进程正在运行，所以我不确定它是否工作。

任何帮助都将不胜感激。

谢谢

Answer 1

您不会收到错误，这些是关于旧字体的警告消息。在后台(和/或使用nohup)启动虚拟X服务器，如下所示

 nohup Xvfb :1 -screen 0 1152x900x8 &

然后，要使用它，在本地主机上将显示设置为:1，如下所示

 export DISPLAY="localhost:1"