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, ...

GS Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings.

Types that extend and augment the Java Collections Framework.

GS Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings.

Java implementation of a concurrent trie hash map from Scala collections library

The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.

Brownies Collections complements the Java Collections Framework. GapList combines the strengths of both ArrayList and LinkedList.

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 ...

Highly Scalable Java

feature-rich collections framework for Java, offering alternatives to standard Java Collections.