Java反射的陷阱：避免常见的错误和误解

import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectionExample {

public static void main(String[] args) {
// Get the class of the object
Class<?> clazz = Object.class;

// Get the public fields of the class
Field[] fields = clazz.getFields();

// Print the names of the public fields
for (Field field : fields) {
System.out.println(field.getName());
}

// Get the public methods of the class
Method[] methods = clazz.getMethods();

// Print the names of the public methods
for (Method method : methods) {
System.out.println(method.getName());
}

// Get the private field "name" of the class
Field nameField = clazz.getDeclaredField("name");

// Set the value of the private field "name" to "John Doe"
nameField.setAccessible(true);
nameField.set(null, "John Doe");

// Get the value of the private field "name"
String name = (String) nameField.get(null);

// Print the value of the private field "name"
System.out.println(name);

// Get the private method "sayHello" of the class
Method sayHelloMethod = clazz.getDeclaredMethod("sayHello");

// Invoke the private method "sayHello"
sayHelloMethod.setAccessible(true);
sayHelloMethod.invoke(null);
}
}