Let's say, I have an array of complex data type objects. For example: FullName[100]
. Each FullName
object has has 2 class member variables: String FirstName
and String LastName
. Now, from this array of FullName
objects, I want to retrieve an array of String FirstNames[]
.
How can I do this without the extensive for loop application?
You can try to take a look at Functional Programming in Java and apply
map
function from one of the libraries.In Java 8 you can do something like this:
I'm not sure why avoiding a loop is so important, but you could do it like this: You could store the names in String arrays and use the Flyweight pattern for your FullName class. So your FullName instances hold a reference to these arrays, and indices that point to the correct elements in the array.