Chvalov

String name = null;
NotNull = false
NotEmpty = false
NotBlank = false

String nam = "";
NotNull = true
NotEmpty = false
NotBlank = false

String name = "  ";
NotNull = true
NotEmpty = true
NotBlank = false

String name = "zojian"
NotNull = true
NotEmpty = true
NotBlank = true

<?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_name">Название апликухи</string>
 </resources>

mWebView.getSettings().setUserAgentString("USER AGENT");

<video width="320" height="240" controls>
  <source src="https://r6---sn-3c27sn7k.googlevideo.com/videoplayback?ratebypass=yes&ei=KXJuWtLaOIHwyAXUiKF4&sparams=dur,ei,expire,id,initcwndbps,ip,ipbits,ipbypass,itag,lmt,mime,mip,mm,mn,ms,mv,nh,pl,ratebypass,requiressl,source&ipbits=0&source=youtube&mime=video%2Fmp4&requiressl=yes&expire=1517209226&pl=21&itag=22&id=o-AM194Ng5bZ7S2qgPEswUEOjPD3iQgTaAjEBHBi1poYuG&lmt=1512363979241221&signature=4B1723BE6BF6191909D246CD914089E4AA2E3C8E.21885E7469A795C0085DF847D3D5618294B516AC&dur=452.069&key=cms1&ip=91.234.127.222&video_id=bvfzNMAlFao&title=%D0%9C%D0%B0%D1%81%D1%82%D0%B5%D1%80+%D1%83%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BA%D0%B8+windows+-+%D0%97%D0%B0%D0%B3%D0%BE%D1%80%D0%B5%D1%86%D1%8C%D0%BA%D0%B0+%D0%9B.+%D0%A1.+%D0%B8+%D0%A2%D0%B8%D0%BD%D0%B0+%D0%9A%D0%B0%D1%80%D0%BE%D0%BB%D1%8C&rm=sn-u32n5-3ufe7z,sn-f5fy76&req_id=295fe597b6d936e2&redirect_counter=2&cms_redirect=yes&ipbypass=yes&mip=93.175.192.186&mm=29&mn=sn-3c27sn7k&ms=rdu&mt=1517187635&mv=m&nh=IgpwcjAxLmticDAzKgkxMjcuMC4wLjE" type="video/mp4">
Your browser does not support the video tag.
</video>

### Database for MySQL ###
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/library?useSSL=false&useUnicode=yes&characterEncoding=UTF-8
spring.datasource.username=root