Question

I’m trying to pass an instance of a class to another object, but i can’t get it to work.

I currently have this:

class MyClass
{
    public void myFunc()
    {
        OtherClass bla = new OtherClass(this);
    }

    public void callback()
    {
        // code...
    }
}

class OtherClass
{
    public OtherClass(Class<?> obj)
    {
        // do some stuff...

        // Call method from obj
        Method method = obj.getMethod("callback", SomeObject.getClass());
        method.invoke(obj, SomeObject);
    }
}

But now it gives me the following error:

The constructor OtherClass(MyClass) is undefined

So it is expecting me to give the class name hardcode in the constructor. How can i make it a generic type, so that it accepts all classes?

Answer 1

Should be:

OtherClass bla = new OtherClass(this.getClass(), this);

And:

public OtherClass(Class<?> clazz, Object obj)
{
    // do some stuff...

    // Call method from obj
    Method method = clazz.getMethod("callback", SomeObject.getClass());
    method.invoke(obj, SomeObject);
}

EDIT

Reading my code, and your comment again, this can be done in even a simpler way, by passing only one parameter:

OtherClass bla = new OtherClass(this);

and:

public OtherClass(Object obj)
{
    Class<?> clazz = obj.getClass();
    // do some stuff...

    // Call method from obj
    Method method = clazz.getMethod("callback", SomeObject.getClass());
    method.invoke(obj, SomeObject);
}