Java 8 stream join and return multiple values

Question

I\'m porting a piece of code from .NET to Java and stumbled upon a scenario where I want to use stream to map & reduce.

class Content
{
  private String          


        

Answer 1

You can use proper lambda for BinaryOperator in reduce function.

Content c = contentList
            .stream()
            .reduce((t, u) -> new Content(
                                  t.getA() + ',' + u.getA(),
                                  t.getB() + ',' + u.getB(), 
                                  t.getC() + ',' + u.getC())
                   ).get();