如何在REPL中使用具有默认(包)或私有访问级别的成员？

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

Class<?> clazz = Class.forName("com.example.MyClass");

Field privateField = clazz.getDeclaredField("myPrivateField");
privateField.setAccessible(true);

Field packagePrivateField = clazz.getDeclaredField("myPackagePrivateField");
packagePrivateField.setAccessible(true);

Method privateMethod = clazz.getDeclaredMethod("myPrivateMethod");
privateMethod.setAccessible(true);

Constructor<?> privateConstructor = clazz.getDeclaredConstructor();
privateConstructor.setAccessible(true);

Object instance = privateConstructor.newInstance();
Object result = privateMethod.invoke(instance);

Object value = privateField.get(instance);
privateField.set(instance, newValue);

import com.example.MyClass;

MyClass instance = new MyClass();
Object packagePrivateFieldValue = instance.getPackagePrivateField();