Enthuware

void forEach(Consumer<? super T> action)
Performs an action for each element of this stream.
This is a terminal operation.

The behavior of this operation is explicitly nondeterministic. For parallel stream pipelines, this operation does not guarantee to respect the encounter order of the stream, as doing so would sacrifice the benefit of parallelism. For any given element, the action may be performed at whatever time and in whatever thread the library chooses. If the action accesses shared state, it is responsible for providing the required synchronization.

Parameters:

Integer[] intArray = {1, 2, 3, 4, 5, 6, 7, 8 };
List<Integer> listOfIntegers =
    new ArrayList<>(Arrays.asList(intArray));

System.out.println("With forEachOrdered:");
listOfIntegers
    .parallelStream()
    .forEachOrdered(e -> System.out.print(e + " "));
System.out.println("");

// output:
// With forEachOrdered:
// 8 7 6 5 4 3 2 1

The [above pipeline] uses the method forEachOrdered, which processes the elements of the stream in the order specified by its source, regardless of whether you executed the stream in serial or parallel. Note that you may lose the benefits of parallelism if you use operations like forEachOrdered with parallel streams.