Question

我在CentOS服务器上运行Java应用程序时遇到问题。当我触发下面的命令时：

java -jar the-application.jar

我收到以下错误：

No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
at java.awt.Window.<init>(Window.java:535)
at java.awt.Frame.<init>(Frame.java:420)
at java.awt.Frame.<init>(Frame.java:385)
at javax.swing.JFrame.<init>(JFrame.java:174)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)
at java.awt.EventQueue.access$300(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:706)
at java.awt.EventQueue$3.run(EventQueue.java:704)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:218)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:133)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:122)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:118)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:110)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

我尝试使用下面的命令定义DISPLAY变量，但这次只更改了错误并且命令再次失败：

设置DISPLAY变量的命令：

export DISPLAY=:0.0

错误：

Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.

根据不同论坛的建议，我也分别尝试了以下的varibales，但没有运气：

export DISPLAY=:0
export DISPLAY=:99
export DISPLAY=:99.0
export DISPLAY=:1
export DISPLAY=:1.0
export DISPLAY=127.0.0.1:0
export DISPLAY=127.0.0.1:0.0
export DISPLAY=127.0.0.1:99
export DISPLAY=127.0.0.1:99.0
export DISPLAY=127.0.0.1:1
export DISPLAY=127.0.0.1:1.0

我尝试了“xhost + localhost”命令，这样可能会有所帮助，但是，我收到以下错误：

-bash: xhost: command not found

任何人都可以帮我解决这个问题吗？提前谢谢大家。

Answer 1

您应该在系统上安装lightDm，如下所述：

http://siripong-computer-tips.blogspot.co.uk/2015/02/how-to-add-cinnamon-lightdm-to-centos-7.html

如果您在VMware上运行CentOS，您也应该在VMware上安装相关工具。

线程“main”java.awt.AWTError中的异常：无法使用'：0.0'作为DISPLAY变量的值连接到X11窗口服务器

1 个答案: