What is new in Java 8 - Part 2

Stream handling in Java8:

The better way of usage of main components of collections called streams. This is not replacement of collections but we can say this is an enhancement over collections.

In Stream it is one-time-use object, once it is traversed it cannot be re-traversed. Stream traverse is of two modes

•    Sequential
•   Parallel

In sequential Traversing:

As the name indicates as Sequential each item in the stream is read processed, then the next item is read till it reaches end of stream.

Ex:

            List <Library> book = list.getStream.collect(Collectors.toList()); 

Parallel Traverse:

On parallel traverse, the array is split into multiple segments, each of which is processed individually on a different thread. The results are then put back together for the output.

Ex: 

List <Library> book = list.getStream.parallel().collect(Collectors.toList());

Parallel Traverse by Split model:

Parallel stream flow:  

    List originalList = someData;

            split1 = originalList(0, mid);

            split2 = originalList(mid,end);

            new Runnable(split1.process());

            new Runnable(split2.process());

            List revisedList = split1 + split2;