groupingBy Collector Program plan: Import the required packages. Create a class “ReduceToMapDemo1”. Define the “main” method. Create a stream “names” for reducing to map. Create a key “KeyMapper” for a string. Key for string is the length of the string. Reduce the stream and get the map using “groupingBy()” method and the key “keymapper”. Print the map.

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Chapter 18, Problem 8PC

Program Plan Intro

groupingBy Collector

Program plan:

Import the required packages.

Create a class “ReduceToMapDemo1”.

Define the “main” method.

Create a stream “names” for reducing to map.

Create a key “KeyMapper” for a string. Key for string is the length of the string.

Reduce the stream and get the map using “groupingBy()” method and the key “keymapper”.

Print the map.

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