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fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists, and queues with a small memory footprint and fast operations; 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. This jar (fastutil-core.jar) contains data structures based on integers, longs, doubles, and objects, only; fastutil.jar contains all classes. If you have both jars in your dependencies, this jar should be excluded.

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/**
 * Classes and static methods that make object and primitive-type I/O easier and faster.
 *
 * 
 * Classes in this package provide very efficient, unsynchronized buffered
 * {@linkplain it.unimi.dsi.fastutil.io.FastBufferedInputStream input} and
 * {@linkplain it.unimi.dsi.fastutil.io.FastBufferedOutputStream output} streams (with support for
 * {@linkplain it.unimi.dsi.fastutil.io.RepositionableStream repositioning}, too) and
 * {@linkplain it.unimi.dsi.fastutil.io.FastByteArrayInputStream fast streams} based on byte arrays.
 *
 * 
 * Static containers provide instead a wealth of methods that can be used to
 * {@linkplain BinIO#storeObject(Object, CharSequence) serialize} or
 * {@linkplain BinIO#loadObject(CharSequence) deserialize} very easily objects and
 * {@linkplain BinIO#storeInts(int[], CharSequence) arrays}, even
 * {@linkplain TextIO#storeInts(int[], CharSequence) in text form}.
 */
package it.unimi.dsi.fastutil.io;