DoubleStream count() returns the count of elements in the stream. DoubleStream count() is present in java.util.stream.DoubleStream. This is a special case of a reduction i.e, it takes a sequence of input elements and combines them into a single summary result.
Note : This is a terminal operation i.e, it may traverse the stream to produce a result or a side-effect. After the terminal operation is performed, the stream pipeline is considered consumed, and can no longer be used.
Example 1 : Count the elements in DoubleStream.
Example 2 : Count distinct elements in DoubleStream.
Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course.