Tag: Project Lambda

JDK 8: State of the Collections

Posted on by lukaseder
Here’s the latest publication by Brian Goetz, Oracle’s project lead for JSR 335, a.k.a. Project Lambda. Here’s a nice example showing new collection features, such as “Streams” using method references: 

List<String> strings = ...
int sumOfLengths = strings.stream()
                          .map(String::length)
                          .reduce(0, Integer::plus);
Another nice example showing the use of lambda expressions: 

int sum = shapes.stream()
                .filter(s -> s.getColor() == BLUE)
                .map(s -> s.getWeight())
                .sum();
See more, here: http://cr.openjdk.java.net/~briangoetz/lambda/sotc3.html