Java Lambdas and Closures

Question

I hear lambdas are coming soon to a Java near you (J8). I found an example of what they will look like on some blog:

SoccerService soccerService = (teamA, te         


        

Answer 1

See this page for a full version of that example (however, the relevant parts are shown below).

The types are inferred from the SoccerService interface and SoccerResult enum, not shown in your snippet:

enum SoccerResult{
    WON, LOST, DRAW
}

interface SoccerService {
    SoccerResult getSoccerResult(Integer teamA, Integer teamB);
}

The benefit (of lambdas versus standard anonymous classes) is just reduced verbosity:

(x, y) => x + y

versus something like:

new Adder()
{
  public int add(int x, int y)
  {
    return x + y;
  }
}

For the difference between a closure and a lambda, see this question.