如何获取泛型变量的实例类型

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

public class GenericClass<T> {
    private Class<T> type;

    public GenericClass() {
        Type superClass = getClass().getGenericSuperclass();
        if (superClass instanceof ParameterizedType) {
            ParameterizedType parameterizedType = (ParameterizedType) superClass;
            Type[] typeArguments = parameterizedType.getActualTypeArguments();
            if (typeArguments.length > 0) {
                type = (Class<T>) typeArguments[0];
            }
        }
    }

    public Class<T> getType() {
        return type;
    }
}

public class Main {
    public static void main(String[] args) {
        GenericClass<String> genericClass = new GenericClass<>();
        Class<String> type = genericClass.getType();
        System.out.println(type);  // 输出：class java.lang.String
    }
}