将列表作为参数传递给 java.lang.reflect.Method

Question

I have a method which looks like this;

public void update(List<Object> obj);

I want to be able to use java.lang.reflect.Method to invoke the method. Do anyone know how to go about doing this?

Answer 1

Use the Class class to get the method:

Class<?> clazz = theObject.getClass();
Method method = clazz.getMethod("update", List.class);

and then invoke the method:

method.invoke(theObject, new ArrayList<Object>());

Generics are erased at runtime. They're a compile-time thing. You may thus use List.class to refer to a List<Object> .

Answer 2

yes, you can do

myObject.getClass()
    .getMethod("update", List.class)
    .invoke(myObject, myListOfObject);