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fastutil

fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.
http://fastutil.di.unimi.it/
Apache License, Version 2.0
Sebastiano Vigna
binary specific footprint type insertion practical priority sets collections lists classes files text with extends provides providing fastutil access framework memory maps java queues fast also small arrays
Files download
File Operation
fastutil-8.2.1.jar download
fastutil-8.2.1.pom download
fastutil-8.2.1-sources.jar download
Apache Maven 
<dependency>
  <groupId>it.unimi.dsi</groupId>
  <artifactId>fastutil</artifactId>
  <version>8.2.1</version>
</dependency>
Gradle Groovy 
implementation 'it.unimi.dsi:fastutil:8.2.1'
Gradle Kotlin 
implementation("it.unimi.dsi:fastutil:8.2.1")
Scala SBT 
libraryDependencies += "it.unimi.dsi" % "fastutil" % "8.2.1"
Groovy Grape 
@Grapes(
  @Grab(group='it.unimi.dsi', module='fastutil', version='8.2.1')
)
Apache Ivy 
<dependency org="it.unimi.dsi" name="fastutil" rev="8.2.1" />
Leiningen 
[it.unimi.dsi/fastutil "8.2.1"]
Apache Buildr 
'it.unimi.dsi:fastutil:jar:8.2.1'
Dependencies

test

|-- junit:junit:4.12