Скачать или смотреть java reflection method

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certainly! java reflection is a powerful feature that allows you to inspect and manipulate classes, methods, fields, and other elements of the java language at runtime. this capability is particularly useful for frameworks, libraries, and applications that require dynamic behavior.

key concepts of java reflection

1. **class class**: the `class` class in java represents a class or an interface in a running java application. it provides methods to get information about the class, such as its methods, fields, constructors, and annotations.

2. **method class**: the `method` class represents a method of a class or interface. it allows you to invoke the method, get its modifiers, return type, and parameter types.

3. **field class**: the `field` class represents a field of a class or interface. it allows you to get and set the value of a field.

4. **constructor class**: the `constructor` class represents a constructor of a class. it allows you to create instances of the class dynamically.

basic example

let's create a simple example to demonstrate java reflection. we will create a class `person` with a private field and a method, and then use reflection to access those elements.

#### step 1: create the person class



#### step 2: use reflection to access the person class

now, let’s write a program that uses reflection to access the private field `name`, the constructor, and the method `displayinfo`.



explanation of the code

1. **loading the class**: we use `class.forname("person")` to load the `person` class at runtime.

2. **accessing the constructor**: we retrieve the constructor using `getdeclaredconstructor()` and make it accessible using `setaccessible(true)`. this allows us to create an instance of `person` even though it's not publicly accessible.

3. **creating an instance**: we create an instance of `person` by invoking the constructor with `newinstance()`.

4. **accessing the private field**: we use `getdeclaredfield("name")` to access the ...

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