Abstract class and 3 inherited classes. Loop in main

[Moskerito]

Added abstract class and 3 inherited classes with methods. Modified main class to call these methods in a loop

[mateacademy-ai-mentor]

Review Summary

Your solution is approved because all core functional requirements are correctly implemented: Machine is an abstract class with public abstract void doWork() and public abstract void stopWork(), Truck, Bulldozer, and Excavator extend it and override these methods with clear English messages, and MainApp uses a Machine[] and polymorphism to call these methods in a loop. The design and access modifiers are appropriate, and there are no functional issues or violations that would block task completion.

The only remaining issues are minor style points about redundant empty lines, for example: in Bulldozer.java and Truck.java you have extra blank lines after the package declaration, immediately after the class declaration, and between methods, and in Excavator.java and MainApp.java there are unnecessary blank lines inside the class/method bodies. These relate to [CHECKLIST ITEM #1], which asks you to avoid redundant empty lines after class declarations or method signatures. To polish your code, remove those extra blank lines so that there is no blank line right after class Name { or directly between consecutive method signatures/bodies, and keep the body compact but readable.

Functionally you did a solid job: your messages are informative and clearly identify each machine, and you are correctly using the abstract type Machine for variables and arrays. Keep focusing on these small formatting details, as they will help you meet automated style checks and maintain clean, professional code in future tasks.

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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. You have an extra blank line between the package and class declaration and also inside the class body that should be removed.

[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. There is an unnecessary blank line right after the class declaration.

[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. There is an unnecessary blank line between methods inside the class.

[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. You have an extra blank line between the package and class declaration and also inside the class body that should be removed.

[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. There is an unnecessary blank line right after the class declaration.

[mateacademy-ai-mentor]

This violates checklist item #1: Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature. There is an extra blank line between the class declaration and the first method; remove it to comply with the style requirement.

[mateacademy-ai-mentor]

This violates checklist item #1: Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature. There is an extra empty line inside main between variable declarations and array creation that you can remove.

[mateacademy-ai-mentor]

This violates checklist item #1: Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature. There is an unnecessary blank line after the package declaration that should be removed.

[mateacademy-ai-mentor]

This violates checklist item #1: Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature. There is an extra blank line right after the class declaration.

[mateacademy-ai-mentor]

This violates checklist item #1: Please don't add redundant empty lines to your code. We don't need them after class declaration or method signature. There is an unnecessary blank line between the two methods inside the class.