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Java Introduction to Functional Programming Functional Programming Fundamentals Function Composition

Andrey Serebryanskiy
Andrey Serebryanskiy
5,756 Points
Posted by Andrey Serebryanskiy
Andrey Serebryanskiy
5,756 Points

When using andThen function does not returns String for some reason

Hi!

In the second FixMe I wrote this line:

homeValueIndex -> usdToArgentinePesoConverter.andThen(argentineCurrencyFormatter));

However, for some reason it returns ?extends<V> istead of String. Here is a screenshot of what exactly IntelliJ writes if I hover on the error:

I made no changes to other code in the challenge.

Can you please explain me, what am I doing wrong?

Thank you in advance.

1 Answer

Carlos Ramirez
Carlos Ramirez
5,084 Points

Hello Andrey,

First drop the lambda, see the variable "homeValueIndex " is not being used so, it is better to just pass the function reference that you already have.

Check this:

usdToArgentinePesoConverter.andThen(argentineCurrencyFormatter)

Regards

Andrey Serebryanskiy
Andrey Serebryanskiy
5,756 Points
Andrey Serebryanskiy
Andrey Serebryanskiy
5,756 Points

Thank you very much, it helped and I understood my mistake)