Modify property value of the objects in list using Java 8 streams

Question

I have a list of Fruit objects in ArrayList and I want to modify fruitName to its plural name.

Refer the example:

@Data
@Al         


        

Answer 1

You can use peek to do that.

List newList = fruits.stream()
    .peek(f -> f.setName(f.getName() + "s"))
    .collect(Collectors.toList());