Java 8 Lambda 表达式

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Basic concept: Lambda 表达式是对象，只有一个函数的function Interface

定义有三种函数接口: Function< T, R> , Consumer<>, Predicate

常用的Collections 函数式:

foreach 用的是Consumer

filter which takes a Predicate interface as a parameter.

MapReduce example:

public void distinctPrimary(String... numbers) {
        List<String> l = Arrays.asList(numbers);
        List<Integer> r = l.stream()
                .map(e -> new Integer(e))
                .filter(e -> Primes.isPrime(e))
                .distinct()
                .collect(Collectors.toList());
        System.out.println("distinctPrimary result is: " + r);
    }

官方文档

http://www.oracle.com/webfolder/technetwork/tutorials/obe/java/Lambda-QuickStart/index.html

一些links

http://blog.csdn.net/ioriogami/article/details/12782141

http://www.oschina.net/translate/java-8-lambda-expressions-examples

http://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html

http://www.oschina.net/question/12_59047

http://www.infoq.com/cn/articles/Java-se-8-lambda

http://www.open-open.com/lib/view/open1365053088359.html

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