http://www.importnew.com/15311.html
http://ifeve.com/%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3g1%E5%9E%83%E5%9C%BE%E6%94%B6%E9%9B%86%E5%99%A8/
https://www.cnblogs.com/oldtrafford/p/6883796.html
http://blog.csdn.net/lc0817/article/details/53868439
https://www.jianshu.com/p/e99000058840
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https://segmentfault.com/a/1190000004682407
jvm 三色着色