Refactor the AlertService and MapAlertDAO classes:

  • Create a new package-private interface, named AlertDAO, that contains the same methods as MapAlertDAO.
  • MapAlertDAO should implement the AlertDAO interface.
  • AlertService should have a constructor that accepts AlertDAO.
  • The raiseAlert and getAlertTime methods should use the object passed through the constructor.
Java SE 8 
 

  •   MapAlertDAO implements AlertDAO interface: Wrong answer
  •   AlertService accepts AlertDAO in its constructor: Wrong answer
  •   The raiseAlert and getAlertTime methods use AlertDAO passed through constructor: Wrong answer

Tags
Java Refactoring Public
Easy

10min

Score Distribution
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