Initialize a Java Map with lambda

InitializeMapWithLambdaExample.java

/**
 * quick and neat way to initialize a Map since Java 8
 */
Map<Integer, String> map = Collections.unmodifiableMap(
  Stream.of(
    new SimpleEntry<>(0, "zero"),
    new SimpleEntry<>(1, "one"),
    new SimpleEntry<>(2, "two"),
    new SimpleEntry<>(3, "three")
  ).collect(Collectors.toMap(
      (e) -> e.getKey(), (e) -> e.getValue()
  )));

Embedded at blog post http://www.smart.biz.pl/techblog/code-for-maintainability-functional-programming-in-java