程序包 cn.ponfee.commons.collect

接口概要

接口	说明
StreamForker.Results

类概要

类	说明
ArrayHashKey	The class use in Object array as hash map key Use for HashMap key
ByteArrayComparator	The utility for compare two byte array For compare
ByteArrayTrait	Represents the class has an byte[] array args constructor and a toByteArray method For serialize
ByteArrayWrapper	The class use in byte array as hash map key For HashMap key
Collects	集合工具类
Comparators	For collection order
DelegatedIntSpliterator<T>	Delegated int spliterator
DoubleListViewer<E>	Double(tow-dimensional) list viewer
FilterableIterator<T>	遍历集合，选取符合条件的元素，用于增强for循环场景 for (String s : FilterableIterator.of("", null, "a")) { System.out.println(s); }
ImmutableArrayList<E>	Representing immutable List
ImmutableHashList<K extends Comparable<K>,V>	Immutable hash map & list structure
LRUCache<K,V>	LRU cache based LinkedHashMap
Maps	Map Utilities
StreamForker<T>	The class use in fork Stream, from book "Java 8 In Action" Usage: Stream<Integer> stream = Stream.of(1, 2, 3, 4, 4, 5, 5); StreamForker.Results results = new StreamForker<>(stream) .fork(1, s -> s.max(Integer::compareTo)) // 直接聚合 .fork(2, s -> s.distinct().reduce(0, Integer::sum)) .getResults();
ValueSortedMap<K,V>	Extends TreeMap sort by value: ValueSortedMap valueSortedMap = ValueSortedMap.nullsFirst(a map); Also use like this: Map<String, Integer> originMap = ImmutableMap.of("b", 2, "a", 1); TreeMap<String, Integer> sortedByValueMap = new TreeMap<>(Comparator.comparing(originMap::get)); sortedByValueMap.putAll(originMap);