Practice Creating Objects Using Reflection (7.2.5) - Annotations and Reflection API

Practice: Creating Objects Using Reflection

Lesson 7.2.5Annotations and Reflection API

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8 questions

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6 sample questions

Question 1.
What method do you use to get a Class object from its name?
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Think about how we reference classes in Java.
Question 2.
How do you create an instance of a class using reflection?
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Remember the method that allows constructor invocation.
3Question 3.
How do you create an object of a class using reflection?
- Using `new Class()`
- Using `clazz.newInstance()`
- Using `clazz.getDeclaredConstructor().newInstance()`
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Focus on how constructors are called.
4Question 4.
True or False: Reflection can access private members of a class.
- True
- False
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Consider the permissions granted by reflection.
Question 5.
Create a Java program that uses reflection to instantiate an object of a class you define, accesses its private field, and prints its value.
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Use `getDeclaredField` and `setAccessible(true)` for accessing the private field.
Question 6.
Write a code snippet that shows how to handle exceptions that may arise when using reflection to create an object.
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Look at the exceptions that are thrown when construction fails.

4 more questions in this section. Enroll free to practise them all.