How to get a list of specific fields values from objects stored in a list?

Question

Say I have an list of objects with two fields field1 and field2, both of String type.

How do I get a list of all field1 values wit

Answer 1

Let the object be of the following class.

public class Bike {

    String bikeModel;
    Int price;
}

And now there is list of bikes called bikeList of type List

So now we want a list of bikemodels of all the bikes in the above list.

bikeList.map{ Bike b -> b.bikeModel }.toCollection(arrayListOf())

returns an array list of first field of all the bike objects in the bikeList