title: An example that shows the requirement of ThreadLocal usage
body: <p>As far as I know, In Java, ThreadLocal class enables us to create a virtual thread scope. So a thread can not accesses to another's variable or something else.</p>
  
  <p>Could you please give some piece of code that coder needs to use ThreadLocal and after usage of ThreadLocal everything is ok.</p>
  
  <p>Thanks.</p>