What are we doing here<br /> <br /> list.stream().collect(Collectors.groupingBy(ClassA::getElement1,<br /> Collectors.averagingDouble(ClassA::getelement2)));

Interview Questions and Answers

Q1. What are we doing here

list.stream().collect(Collectors.groupingBy(ClassA::getElement1,
Collectors.averagingDouble(ClassA::getelement2)));

Core Java

Ans. We are averaging elements of a collection by element1 grouped by element1

* list is the reference of collection
* element1 is the member element returned by getElement1 method of ClassA
* element2 is the member element returned by getElement2 method of ClassA

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list.stream().collect(Collectors.groupingBy(ClassA::getElement1,
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