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java-8-exercises's Introduction

Prepare project for your favorite IDE

Use gradle to import dependencies and create ide-specific project files. Gradle wrapper scripts are included (no need to download anything new)

./gradlew eclipse   # Eclipse
./gradlew idea      # IntelliJ IDEA

# use gradlew.bat on Windows

ToUpperCase (map)

Convert elements of a collection to upper case.

FilterCollection (filter)

Filter collection so that only elements with less then 4 characters are returned.

FlatCollection (flatMap)

Flatten multidimensional collection

OldestPerson (max, comparator)

Get oldest person from the collection

Sum (reduce)

Sum all elements of a collection

Kids (filter, map)

Get names of all kids (under age of 18)

PeopleStats (summaryStatistics)

Get people statistics: average age, count, maximum age, minimum age and sum og all ages.

Partitionaing (partitioningBy)

Partition adults and kids

Grouping (groupingBy)

Group people by nationality

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