Machine classes

[WOLFnik5]

Create abstract Machine class with doWork() and stopWork() methods
Add Truck, Bulldozer and Excavator classes extending Machine
Implement MainApp with array of machines and looped work calls

[mateacademy-ai-mentor]

Review Summary

Your solution meets the functional requirements: the abstract Machine defines doWork() and stopWork(), each concrete class (Truck, Bulldozer, Excavator) overrides them with English messages, and MainApp iterates over a Machine[] calling both methods. Well done on using polymorphism correctly and keeping method signatures public.

Minor style notes to address next time (non-blocking):

• [CHECKLIST] Remove redundant empty lines:
  • Machine.java: delete the blank line between the two abstract method declarations.
  • MainApp.java line 6: remove the extra blank line inside main.
  • Truck.java: remove the blank line between doWork() and the @Override of stopWork().
• Optional: keep spacing consistent in array literals (e.g., add a space after commas).

Overall, nice work—functionality is correct and clear. Keep polishing formatting to align fully with the checklist.

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Footnotes

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[mateacademy-ai-mentor]

This violates checklist item: "Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature." Remove the blank line between the two abstract method declarations so there is no empty line after the doWork() signature. See the checklist guidance for this rule.

[mateacademy-ai-mentor]

This violates checklist item: "Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature." Remove the blank line at line 6 to avoid redundant empty lines and match the style guidance.

[mateacademy-ai-mentor]

This violates checklist item: "Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature." Remove the blank line between the doWork() method and the @Override for stopWork() so there are no redundant empty lines in the class.