Java 8 Stream Collectors groupingby, count, sum, sort

In this Java 8 Stream Collectors groupingby post, we will show you how to use Stream Collectors to group by, count, sum and sort a List that is offered by the Java 8 Collectors API. The Java 8 Stream API lets us process collections of data in a declarative way.

Let’s dig deeper via various examples:

1. Group by, Count and Sort
Group by a List and display the total count of it. Then add sorting that result .

Output

2. Group by, Count and Sort on a list of objects
We have a pojo as below

Group by the name and Count or Sum the age on the people list.

Output

Group by Price and Collectors.mapping example

Output
Java 8 Stream Collectors groupingby

That’s all about Java 8 Stream Collectors groupingby examples.

References
Collectors (Java Platform SE 8 )

Download complete source code, click link below

Java8StreamCollectors.zip (1 download)

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