11.3. OOP Terminology and Concepts

Try these first

1. 1.

   What is the purpose of a constructor in a class?

   Hint

   Think about what happens when an object is created.

2. 2.

   What does the 'this' keyword do?

   Hint

   It helps differentiate instance variables from parameters.

3. 3.

   What is the purpose of a constructor in a class?

   • To define class behavior
   • To initialize objects
   • To retrieve values

   Hint

   Think about the role of object creation.

4. 4.

   The 'this' keyword refers to:

   • True
   • False

   Hint

   It differentiates the object's attributes from method parameters.

5. 5.

   Create a Java program with a class 'Student' that has a final variable 'ID', a static variable 'totalStudents', and appropriate constructors. Show how they interact through instantiation.

   Hint

   Remember to declare final fields in the constructor and to use static correctly.

6. 6.

   Design a Java class called 'BankAccount' with methods to deposit and withdraw money. The method to withdraw should be static and the variable holding balance should be final. Explain why this design might be problematic.

   Hint

   Consider how final affects the balance variable.