如何检查成员变量是否是Java中带有反射的Map？

Question

I know that I can check for a List by using

 Collection.class.isAssignableFrom(field.getType()) 

But how can I check if a Field in a class is an implementation of a Map?

    void myMethod(Class<?> classToCheck) {
        Field[] fields = classToCheck.getDeclaredFields();

        for(Field field:fields) {
           // check if field implements Map<?,?>
        }
    }

Answer 1

You can use the Field#getType() method which will return you the Class<?> of the field.

for(Field field:fields) {
    Class<?> clazz = field.getType();
    boolean isItAMap = Map.class.isAssignableFrom(clazz);
}

Answer 2

您可以尝试使用：

Map.class.isAssignableFrom(field.getType())