如何使用bytebuddy将私有字段添加到类中

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.DynamicType;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.FieldAccessor;

public class ByteBuddyExample {
    public static void main(String[] args) throws IllegalAccessException, InstantiationException {
        // 创建一个新的类
        DynamicType.Unloaded<?> dynamicType = new ByteBuddy()
                .subclass(Object.class)
                .name("MyClass")
                .defineField("privateField", String.class)
                .make();

        // 加载类并实例化
        Class<?> loadedClass = dynamicType.load(ByteBuddyExample.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)
                .getLoaded();
        Object instance = loadedClass.newInstance();

        // 设置私有字段的值
        loadedClass.getDeclaredField("privateField").setAccessible(true);
        loadedClass.getDeclaredField("privateField").set(instance, "Hello, ByteBuddy!");

        // 获取私有字段的值
        String privateFieldValue = (String) loadedClass.getDeclaredField("privateField").get(instance);
        System.out.println(privateFieldValue);
    }
}