Java 8 stream hidden features

we can make use of

Stream.ofNullable - return the same result as above

2.stream.iterate()- create infinite stream, creating certain pattern like 0,2,4,6,8.......

This create infinite stream

To break this infinite stream, we need to add termination, so we make use of limit as below

Collectors.collectingAndThen

to perform addtional transformation on collectors.

for ex: avg salary of employee

stream.takeWhile, stream.dropWhile

Collectors.teeing()

allows you to collect 2 collectors parallel and combine the result.

stream.concat

Collectors.partioningBy

allows you to partition a stream by certain condition