How to access private methods using Java reflection?

To access private methods in Java using reflection, you can follow these steps:

1. To obtain a Class object: first, use the Class.forName() method to get the Class object of the class you want to manipulate. For example, if you need to access the private method of a class named “Example”, you can use the following code:

Class<?> clazz = Class.forName("Example");

1. To obtain a Method object: next, use the getDeclaredMethod() method to obtain the Method object for a private method. This method requires two parameters: the name of the private method and the types of its parameters. For example, if you want to obtain a private method named “privateMethod”, you can use the following code:

Method method = clazz.getDeclaredMethod("privateMethod", parameterTypes);

1. To make a method accessible, since private methods are not accessible by default, you need to use the setAccessible() method to set it as accessible. For example, you can use the following code:

method.setAccessible(true);

1. To call the method: finally, invoke the private method using the invoke() method. For example, you can use the following code:

Object result = method.invoke(object, args);

object is an object instance that contains private methods, and args is an array of parameters passed to the private methods.

It should be noted that accessing private methods through reflection may violate the principle of encapsulation, so it should be used with caution and only in justified and reasonable scenarios.