Java Reflection: Advanced Feature and Usage
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Questions and Answers

What can be used to examine or modify the runtime behavior of a class?

  • The java)lang package
  • The java)lang.Class class (correct)
  • The java)lang.reflect package
  • The Reflection API

    • What is the main purpose of the Reflection API?

  • To break the principles of encapsulation
  • To get information about the structure of objects
  • To get the instance of Class class
  • To get the object of Class class (correct)

    • What is a disadvantage of using reflection?

  • It can be slow (correct)
  • It is difficult to use
  • It can break the principles of encapsulation
  • It is not a feature of the language

    • What is the main purpose of java reflection?

    <p>To inspect and modify the runtime behavior of a class</p> Signup and view all the answers

    What is usually recommended when using reflection?

    <p>To avoid using it</p> Signup and view all the answers

    Study Notes

    • Reflection is a process of examining or modifying the run time behavior of a class at run time.

    • The java.lang.Class class provides many methods that can be used to get metadata, examine and change the run time behavior of a class.

    • The java.lang and java.lang.reflect packages provide classes for java reflection.

    • The Reflection API is mainly used in:

    • getting the object of Class class

    • getting the instance of Class class

    • using the .class syntax

    • determining the class object

    • using reflection, one can break the principles of encapsulation.

    • Reflection is an advanced feature that can be used by programmers or developers who have a good knowledge of the basics of the language.

    • Reflection can be used to get information about the structure of objects or the methods that are implemented by objects.

    • Reflection can be slow because it has to perform a lot of operations on the objects that it is looking at.

    • It is usually advisable to avoid using reflection because it can slow down the application.

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    Description

    Learn about the Java Reflection API, its capabilities, and its impact on runtime behavior. Understand when to use reflection and its potential drawbacks for application performance.

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