Java 8 modify stream elements

Question

I wanted to write pure function with Java 8 that would take a collection as an argument, apply some change to every object of that collection and return a new collection aft

Answer 1

To make this more elegant way I would suggest create a Method with in the class.

 public class SampleDTO {
 private String text;
public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

public SampleDTO(String text) {
    this.text = text;
}

public SampleDTO getSampleDTO() {
    this.setText(getText()+"xxx");
    return this;
}
    }

and add it like:

List output =list.stream().map(SampleDTO::getSampleDTO).collect(Collectors.toList();