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certainly! java reflection is a powerful feature that allows you to inspect and manipulate classes, methods, fields, and other components of the java language at runtime. it's commonly used in frameworks, libraries, and tools for dynamic behavior, but it can also be a topic of interest in interviews.

below is a comprehensive tutorial on java reflection, including common interview questions and answers, along with code examples.

what is java reflection?

java reflection is part of the `java.lang.reflect` package and enables developers to inspect classes, interfaces, fields, and methods at runtime without knowing their names at compile time. it allows you to:

inspect class properties (methods, fields, constructors).
invoke methods dynamically.
access and modify fields.
create new instances of classes.

common java reflection interview questions

#### 1. what is reflection in java?

**answer**: reflection is a feature in java that allows the program to analyze and manipulate its own structure at runtime. it is used to inspect classes, interfaces, fields, and methods, and can be useful for various purposes, such as debugging, testing, and implementing frameworks.

#### 2. how do you obtain the class object in java?

**answer**: you can obtain the class object using three methods:
using the class name: `classname.class`
using the `getclass()` method of an object: `object.getclass()`
using `class.forname("fully.qualified.classname")`

**example**:


#### 3. how do you get the fields of a class using reflection?

**answer**: you can use the `getdeclaredfields()` method to get all fields, including private fields.

**example**:


#### 4. how do you invoke a method using reflection?

**answer**: you can use the `method` class to invoke methods. you first retrieve the method using `getdeclaredmethod()`, and then invoke it using the `invoke()` method.

**example**:


#### 5. how do you access and modify private fields using reflection?

**answer**: you ...

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