如何从Java泛型类中提取出满足编译器要求的类？

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public class GenericClassExtractor<T> {
    private Class<T> extractedClass;

    public GenericClassExtractor() {
        Type genericSuperclass = getClass().getGenericSuperclass();
        if (genericSuperclass instanceof ParameterizedType) {
            Type[] actualTypeArguments = ((ParameterizedType) genericSuperclass).getActualTypeArguments();
            if (actualTypeArguments.length > 0) {
                extractedClass = (Class<T>) actualTypeArguments[0];
            }
        }
    }

    public Class<T> getExtractedClass() {
        return extractedClass;
    }

    public static void main(String[] args) {
        GenericClassExtractor<String> extractor = new GenericClassExtractor<>();
        Class<String> extractedClass = extractor.getExtractedClass();
        System.out.println(extractedClass);
    }
}