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jv-oop

  • Create class Machine containing methods public abstract void doWork() and public abstract void stopWork().
  • Create classes Truck, Bulldozer, Excavator that will inherit from Machine.
  • In those classes override doWork(), so it will print message that certain machine started its work.
  • Override stopWork() as well. It should print messages that certain machine stopped its work.
  • In Main class create an object of each class.
  • Start work of all machines and then stop them.

Try to avoid these common mistakes, while solving task