CODEWITHSUNDEEP
javajava-stream
arena
arena

Reputation: 233

Create object from list using stream/map java 8

I have a list of objects. I would like to create individual objects from this list with a method and not calling always: personList.get(0), personList.get(1), etc. The object name should be the Person name from the list element.

List<Person> personList = ...;

I'd like to iterate over the personList and create new objects by name for each object from the list.

Person class contains name attribute with a getter.

How can I do that?

Upvotes: 4

Views: 9059

Answers (2)

jkchu
jkchu

Reputation: 98

Just a simple forEach loop:

personList.forEach(p -> {
  T newObject = new T(p.getName());
  // Do what you need to do with each new object
});

If you are trying to do something more complicated, then Aonminè's answer is probably what you really need.

Upvotes: -1

Ousmane D.
Ousmane D.

Reputation: 56423

Just stream the list and invoke the map operation as follows:

personList.stream()
          .map(x -> new T(x.getName()))
          .collect(Collectors.toList());

Where T is the new type of elements you want to create e.g. Student, Person, Employee etc..

Upvotes: 7

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