type of parameter when using java reflection

Question

In a library, there is a function takes a Class object as parameter:

public void libMethod(Class<?> cls){...}

I need to invoke this library function in Java Reflection way.

For example I have a class :

public MySchool extends School{...}

I want to pass MySchool class to the library function. I tried:

//I can successfully get library class & a instance of it
Class<?> libClass = GET_LIB_CLASS();

//How can I define the type for the parameter?
Method m = libClass.getDeclaredMethod("libMethod", new Class[]{MySchool.class});
return m.invoke(libClass.newInstance(), MySchool.class);

I tried in above way, but it doesn't work.

How can I define the type for the parameter in my above java reflection way ?

Rohit Jain · Accepted Answer · 2014-02-03 15:31:44Z

1

Note that your method takes argument of type Class<?>. The argument you pass to the Class#getDeclaredMethod() is an array of Class instances for the format parameter types of that method, which in this case will be Class.class, and not MySchool.class.

So, you should get the method as:

Method m = libClass.getDeclaredMethod("libMethod", new Class[]{Class.class});

edited Feb 3, 2014 at 15:31

answered Feb 3, 2014 at 15:21

Rohit Jain

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