Calling objects method and return same object using functional api

Question

At the moment I have:

cardLabels = cards.stream()
            .map(ImageSupplier::getCard)
            .map(JLabel::new)
            .collect(toList());

cardLabels.stream().forEach(container::add);

I can write lambda expression:

.map(c ->{ 
  JLabel label = new JLabel(c);
  container.add(label);
  return label;
 })

but it seems long. Is there something that I can call like .doStuff(container::add) with would return stream of JLabel?

Answer 1

Perhaps you are looking for peek:

return cards.stream()
            .map(ImageSupplier::getCard)
            .map(JLabel::new)
            .peek(container::add);

Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.

This is an intermediate operation.