在~/.bashrc环境变量文件最下方加入：
export DISPLAY=:0.0
然后，刷新环境变量以使其生效：
source ～/.bashrc
参考：http://stackoverflow.com/questions/662421/no-x11-display-variable-what-does-it-mean
Linux下运行Java项目时，出现No X11 DISPLAY variable was set, but this program performed an operation which requires it.的问题解决
原文：http://www.cnblogs.com/EasonJim/p/6832657.html
