JDK 8: State of the Collections

lukaseder

13 years ago

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&lt;String&gt; 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 -&gt; s.getColor() == BLUE)
                .map(s -&gt; s.getWeight())
                .sum();

See more, here: http://cr.openjdk.java.net/~briangoetz/lambda/sotc3.html