java note

java hashcode 31

https://segmentfault.com/a/1190000010799123  科普：为什么 String hashCode 方法选择数字31作为乘子

thread sample : need rss url

http://www.jedi.be/blog/2009/04/30/download-all-original-pictures-from-flickr-and-picasa-via-rss-in-iphoto/

http://picasaweb.google.com/data/feed/base/user/xquesada/albumid/5308588300458757601?alt=rss&kind=photo&hl=en_US

upnp 

Google word:   upnp port list

http://192.168.0.1:5000/rootDesc.xml

http://zderadicka.eu/check-upnp-port-mapping-on-you-router/

http://mailinglists.945824.n3.nabble.com/Port-forwarding-in-Android-td2367832.html

https://github.com/kaklakariada/portmapper/blob/master/src/main/java/org/chris/portmapper/router/cling/ClingPortMappingExtractor.java

https://blog.csdn.net/chenxiaodan_danny/article/details/53929813   [JAVA] float,double大数据不要科学计数方法显示 . 纠结了很久计算ResPriceProvider价格时，最好改为 转 BigDecimal 然后调用 toPlainString方法 来解决。