asked on

Core java. Create the class with method that transform a collection of customer objects to string object collection.

Let there is pretty straightforward class

public class Employees {
    String lastName;

    Employees(String str) {
        this.lastName = str;

    }

    public String getLastName() {
        return lastName;
    }
}

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public class EmployeesTest {

    public static void main(String[] args) { 
        new Employees("Smith");
        new Employees("Page");
        new Employees("Musk");
        new Employees("Dorsy");
        new Employees("Gates");
       
    }
}

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I need to create some transform method that convert my employees collection into a String collection with last names of the employees. It is be best if the argument(s) of the method will be at topest level of collection hierarchy as much as possible ( Collection at best if it is possible ) .

CollectionUtils.transform(stringList, employeesList);

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Thx in advance.

ASKER CERTIFIED SOLUTION

zzynx

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SunnyX

ASKER

   public static Collection<String> transform(Collection<String> strCollection, Collection myCollection) {
        Iterator it = myCollection.iterator();
        while (it.hasNext()) {
            strCollection.add(it.next().toString());
        }
        return strCollection;
    }

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Like this ?
is there a way to do it smarter ?

SunnyX

ASKER

thx for the help

gurpsbassi

why are you passing in the string collection as the first argument: transform(Collection<String> strCollection, Collection myCollection) {

You don't need to.

zzynx

>> thx for the help
You're welcome.
Thanx 4 axxepting