title: Eclipe LUNA - "The import java.sql cannot be resolved"
body: <p>I have Eclipse LUNA and JDK 8 installed on my computer.
  I get the message "The import java.sql cannot be resolved" on the import lines.</p>
  
  <p>i checked the jre definition (windows -> reference -> java -> installed JREs
  and it is setup there to the folder of the jre on my computer.</p>
  
  <p>what is the problem?</p>