OpenJDK7

http://cduym.iteye.com/blog/1892416

https://www.jianshu.com/p/d68c3848ecea

https://blog.csdn.net/y444400/article/details/65487458#commentBox

http://download.java.net/openjdk/jdk7/promoted/b147/openjdk-7-fcs-src-b147-27_jun_2011.zip

sudo apt-get install build-essential gawk m4 openjdk-6-jdk libasound2-dev libcups2-dev libxrender-dev xorg-dev xutils-dev x11proto-print-dev binutils libmotif3 libmotif-dev ant

error:

https://focusvirtualization.blogspot.tw/2016/11/current-java-version-on-my-ubuntu-gcc.html

https://blog.csdn.net/my_computer/article/details/37879469