11.4. Object Class and Method Overriding (Java-Specific)

Try these first

1. 1.

   What is the Object class in Java?

   Hint

   Think about where all classes start from.

2. 2.

   What does method overriding allow in Java?

   Hint

   Consider how subclasses can change behaviors.

3. 3.

   What method is used to compare two objects for equality in Java?

   • compare()
   • equals()
   • isSame()

   Hint

   Think of how you'd compare two items.

4. 4.

   True or False: Every class in Java inherits from the Object class.

   • True
   • False

   Hint

   Consider the root of the class hierarchy.

5. 5.

   Create a Java class hierarchy with a superclass Vehicle and subclasses Car and Truck. Override a method in both subclasses and demonstrate polymorphism.

   Hint

   Think of how methods might behave differently in subclasses.

6. 6.

   Why is method overriding also beneficial for code testing?

   Hint

   Consider how testing frameworks often need different behaviors from the same method.