Java extend class with a reflected class

Question

I tried to make a reflection to my code but I came across a problem because I had to extend class with reflected class, it was something like this:

I have this classes reflected:

"some.package.a.SomeClass"
"some.package.b.SomeClass"

and now I need to extend another class with one of them

public MyClass extends SomeClass {
    @Override
    public Object...

is there any way that I can achieve this?

Reflection is something you do at runtime, extending classes is usually done at/before compile time. Are you using runtime byte code generation (cglib, byte buddy, ...)? — Hero Wanders, Sep 23 '18 at 11:25
aw, if extending is done in compiling process then I cant do this, thanks for explaining... — DisplayName, Sep 23 '18 at 11:30
Possible duplicate of [Extending class at runtime](https://stackoverflow.com/questions/19233923/extending-class-at-runtime) — Joe, Feb 02 '19 at 13:01

score 0 · Answer 1 · answered Sep 23 '18 at 11:29

Using off-the-shelf Java, you cannot extend a class given to you only through reflection. There are third-party libraries that let you overcome this restriction (see this Q&A).

Extending a class requires defining a new class, and compiling it into bytecode. Reflection happens at run-time. It is inherently a read-only API, so you cannot emit new classes with it.

Implementing an interface gives you another option of using a Proxy, but you cannot specify your own base class.

Java extend class with a reflected class

1 Answers1