判断一个类是Java原生类型还是用户自定义类型

方法：打印出这个类的类加载器可判断：类.class.getClassLoader();，核心类库加载器会返回：null

/**
 * 判断一个类是JAVA类型还是用户定义类型
 * @param clz
 * @return
 */
public static boolean isJavaClass(Class<?> clz) {   
    return clz != null && clz.getClassLoader() == null;   
}

public static void main(String... args) {
  System.out.println(isJavaClass(Integer.class)); // true
  System.out.println(isJavaClass(BugMeNot.class)); // false
}

https://blog.csdn.net/sinat_33852001/article/details/82492949
https://blog.csdn.net/redennc/article/details/22620875
https://blog.csdn.net/oygen/article/details/88330292