24.2.2. Inspecting Class Members

Try these first

1. 1.

   What method would you use to access private fields of a class?

   Hint

   Think about which method gives you access regardless of visibility.

2. 2.

   Which method provides only accessible methods of a class?

   Hint

   Consider what 'accessible' means in this context.

3. 3.

   What does getDeclaredFields() return?

   • Only public fields
   • All fields regardless of visibility
   • Only static fields

   Hint

   Consider what 'declared' implies.

4. 4.

   True or False: getMethods() retrieves private methods.

   Hint

   Think about method accessibility.

5. 5.

   Write a program using reflection that inspects a custom class with multiple private fields and methods, modifies a field, and invokes a method dynamically. Document your code with comments explaining each step.

   Hint

   Start with defining the class first, then apply reflection methods.

6. 6.

   Construct a scenario where using reflection might cause performance issues in a large-scale application. Discuss how you would mitigate this issue.

   Hint

   Consider how often you need to access and modify fields/methods dynamically.