Question

I am currently working on a project where I have to make some method generic (to make the code more readable).

The projects has two classes: Box and MyList.
The constructor for ‘Box’ accepts to generic parameters; the constructor for ‘MyList’ only one.

public class Box<A, B> {}

That is the class for the box.

public class MyList<T> {}

And thats the class for MyList.

In the class ‘Box’ I have a method that looks like this:

public static MyList enclose (Box <MyList <Integer, String>> t) {
// Here comes some code that is not important right now.
}

What I want now, is to make this method generic so that it not only takes in parameters like a Box. Has anyone an idea?

Answer 1

It is not completely clear what you want to do, and the number of generic parameters do not match your classes but maybe this does the work?

public <T> static MyList<T> enclose (Box <MyList <T>, String> t) {
// Here comes some code that is not important right now.
}

Or if you want to avoid talking about MyList, maybe this:

public <T> static T enclose (Box <T, String> t) {
// Here comes some code that is not important right now.
}

The second version has the type of the first generic parameter of the Box object as its return type…