title: Migration of Java Application from 1.5 to 1.8
body: <p>We are working in the project of migrating a application(built in java 5)
  to java 8 for better performance,</p>
  
  <p>But , we are not sure that
  1. upgrade an environment or
  2.Build that complete app in java 8 from scratch,</p>
  
  <p>and how it will improve the performance !</p>
  
  <p>And we know that, There will be some Deprecated API's from version to version.
  so, while upgrading is it possible to get error or miss some functionality ?</p>
  
  <p>How can We rectify that?</p>
  
  <p>Please comment your suggestions !</p>