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fastutil

fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists, and queues with a small memory footprint and fast access and insertion; it provides also big (64-bit) arrays, sets and lists, sorting algorithms, fast, practical I/O classes for binary and text files, and facilities for memory mapping large files. Note that if you have both this jar and fastutil-core.jar in your dependencies, fastutil-core.jar should be excluded.
http://fastutil.di.unimi.it/
Apache License, Version 2.0
Sebastiano Vigna
binary both specific have footprint mapping type insertion practical excluded dependencies sorting sets algorithms note lists collections facilities classes files text with extends your provides providing access fastutil framework should memory that maps java core queues fast also small this arrays large
Files download
File Operation
fastutil-8.5.8.jar download
fastutil-8.5.8.pom download
fastutil-8.5.8-sources.jar download
Apache Maven 
<dependency>
  <groupId>it.unimi.dsi</groupId>
  <artifactId>fastutil</artifactId>
  <version>8.5.8</version>
</dependency>
Gradle Groovy 
implementation 'it.unimi.dsi:fastutil:8.5.8'
Gradle Kotlin 
implementation("it.unimi.dsi:fastutil:8.5.8")
Scala SBT 
libraryDependencies += "it.unimi.dsi" % "fastutil" % "8.5.8"
Groovy Grape 
@Grapes(
  @Grab(group='it.unimi.dsi', module='fastutil', version='8.5.8')
)
Apache Ivy 
<dependency org="it.unimi.dsi" name="fastutil" rev="8.5.8" />
Leiningen 
[it.unimi.dsi/fastutil "8.5.8"]
Apache Buildr 
'it.unimi.dsi:fastutil:jar:8.5.8'
Dependencies

test

|-- junit:junit:4.12