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java.util.stream 包的共享 API

java.util.stream 包的共享 API

请参阅共享 API，以了解所有包和类的概述。

BaseStream

void close()
boolean equals(Object)
int hashCode()
boolean isParallel()
Iterator iterator()
BaseStream sequential()
Spliterator spliterator()
null toString()
BaseStream unordered()

Collector

static Collector of(Supplier, BiConsumer, BinaryOperator, Collector.Characteristics[])
static Collector of(Supplier, BiConsumer, BinaryOperator, Function, Collector.Characteristics[])
BiConsumer accumulator()
Set characteristics()
BinaryOperator combiner()
boolean equals(Object)
Function finisher()
int hashCode()
Supplier supplier()
null toString()

Collector.Characteristics

static Collector.Characteristics CONCURRENT
static Collector.Characteristics IDENTITY_FINISH
static Collector.Characteristics UNORDERED
static Collector.Characteristics valueOf(null)
static Collector.Characteristics[] values()
int compareTo(Enum)
boolean equals(Object)
int hashCode()
null name()
int ordinal()
null toString()

Collectors

static Collector averagingDouble(ToDoubleFunction)
static Collector averagingInt(ToIntFunction)
static Collector averagingLong(ToLongFunction)
static Collector collectingAndThen(Collector, Function)
static Collector counting()
static Collector groupingBy(Function)
static Collector groupingBy(Function, Collector)
static Collector groupingBy(Function, Supplier, Collector)
static Collector joining()
static Collector joining(CharSequence)
static Collector joining(CharSequence, CharSequence, CharSequence)
static Collector mapping(Function, Collector)
static Collector maxBy(Comparator)
static Collector minBy(Comparator)
static Collector partitioningBy(Predicate)
static Collector partitioningBy(Predicate, Collector)
static Collector reducing(BinaryOperator)
static Collector reducing(def, BinaryOperator)
static Collector reducing(def, Function, BinaryOperator)
static Collector summarizingDouble(ToDoubleFunction)
static Collector summarizingInt(ToIntFunction)
static Collector summarizingLong(ToLongFunction)
static Collector summingDouble(ToDoubleFunction)
static Collector summingInt(ToIntFunction)
static Collector summingLong(ToLongFunction)
static Collector toCollection(Supplier)
static Collector toList()
static Collector toMap(Function, Function)
static Collector toMap(Function, Function, BinaryOperator)
static Collector toMap(Function, Function, BinaryOperator, Supplier)
static Collector toSet()
boolean equals(Object)
int hashCode()
null toString()

DoubleStream

static DoubleStream.Builder builder()
static DoubleStream concat(DoubleStream, DoubleStream)
static DoubleStream empty()
static DoubleStream of(double[])
boolean allMatch(DoublePredicate)
boolean anyMatch(DoublePredicate)
OptionalDouble average()
Stream boxed()
void close()
def collect(Supplier, ObjDoubleConsumer, BiConsumer)
long count()
DoubleStream distinct()
boolean equals(Object)
DoubleStream filter(DoublePredicate)
OptionalDouble findAny()
OptionalDouble findFirst()
DoubleStream flatMap(DoubleFunction)
void forEach(DoubleConsumer)
void forEachOrdered(DoubleConsumer)
int hashCode()
boolean isParallel()
PrimitiveIterator.OfDouble iterator()
DoubleStream limit(long)
DoubleStream map(DoubleUnaryOperator)
IntStream mapToInt(DoubleToIntFunction)
LongStream mapToLong(DoubleToLongFunction)
Stream mapToObj(DoubleFunction)
OptionalDouble max()
OptionalDouble min()
boolean noneMatch(DoublePredicate)
DoubleStream peek(DoubleConsumer)
OptionalDouble reduce(DoubleBinaryOperator)
double reduce(double, DoubleBinaryOperator)
DoubleStream sequential()
DoubleStream 跳过(long)
DoubleStream 排序()
Spliterator.OfDouble 分割迭代器()
double 求和()
DoubleSummaryStatistics 汇总统计()
double[] 转换为数组()
null toString()
BaseStream unordered()

DoubleStream.Builder

void 接受(double)
DoubleStream.Builder 添加(double)
DoubleConsumer 然后(DoubleConsumer)
DoubleStream 构建()
boolean equals(Object)
int hashCode()
null toString()

IntStream

static IntStream.Builder 构建器()
static IntStream 连接(IntStream, IntStream)
static IntStream 空流()
static IntStream of(int[])
static IntStream 范围(int, int)
static IntStream 闭区间范围(int, int)
boolean 全部匹配(IntPredicate)
boolean 任意匹配(IntPredicate)
DoubleStream 转换为DoubleStream()
LongStream 转换为LongStream()
OptionalDouble 平均值()
Stream 装箱()
void close()
def 收集(Supplier, ObjIntConsumer, BiConsumer)
long 计数()
IntStream 去重()
boolean equals(Object)
IntStream 过滤(IntPredicate)
OptionalInt 查找任意一个()
OptionalInt 查找第一个()
IntStream 扁平化映射(IntFunction)
void 遍历(IntConsumer)
void 按顺序遍历(IntConsumer)
int hashCode()
boolean isParallel()
PrimitiveIterator.OfInt 迭代器()
IntStream 限制(long)
IntStream 映射(IntUnaryOperator)
DoubleStream 映射到DoubleStream(IntToDoubleFunction)
LongStream 映射到LongStream(IntToLongFunction)
Stream 映射到Stream(IntFunction)
OptionalInt 最大值()
OptionalInt 最小值()
boolean 没有任何匹配(IntPredicate)
IntStream 窥探(IntConsumer)
OptionalInt 规约(IntBinaryOperator)
int 规约(int, IntBinaryOperator)
IntStream 顺序流()
IntStream 跳过(long)
IntStream 排序()
Spliterator.OfInt 分割迭代器()
int 求和()
IntSummaryStatistics 汇总统计()
int[] 转换为数组()
null toString()
BaseStream unordered()

IntStream.Builder

void 接受(int)
IntStream.Builder 添加(int)
IntConsumer 然后(IntConsumer)
IntStream 构建()
boolean equals(Object)
int hashCode()
null toString()

LongStream

static LongStream.Builder 构建器()
static LongStream 连接(LongStream, LongStream)
static LongStream 空流()
static LongStream of(long[])
static LongStream 范围(long, long)
static LongStream 闭区间范围(long, long)
boolean 全部匹配(LongPredicate)
boolean 任意匹配(LongPredicate)
DoubleStream 转换为DoubleStream()
OptionalDouble 平均值()
Stream 装箱()
void close()
def 收集(Supplier, ObjLongConsumer, BiConsumer)
long 计数()
LongStream 去重()
boolean equals(Object)
LongStream 过滤(LongPredicate)
OptionalLong 查找任意一个()
OptionalLong 查找第一个()
LongStream 扁平化映射(LongFunction)
void 遍历(LongConsumer)
void 按顺序遍历(LongConsumer)
int hashCode()
boolean isParallel()
PrimitiveIterator.OfLong 迭代器()
LongStream 限制(long)
LongStream 映射(LongUnaryOperator)
DoubleStream 映射到DoubleStream(LongToDoubleFunction)
IntStream 映射到IntStream(LongToIntFunction)
Stream 映射到Stream(LongFunction)
OptionalLong 最大值()
OptionalLong 最小值()
boolean 没有任何匹配(LongPredicate)
LongStream 窥探(LongConsumer)
OptionalLong 规约(LongBinaryOperator)
long 规约(long, LongBinaryOperator)
LongStream sequential() 顺序流
LongStream skip(long) 跳过指定数量的元素
LongStream sorted() 排序
Spliterator.OfLong spliterator() 获取流的Spliterator
long sum() 求和
LongSummaryStatistics summaryStatistics() 获取统计摘要
long[] toArray() 转换为long数组
null toString()
BaseStream unordered()

LongStream.Builder LongStream构建器

void accept(long) 接收一个long值
LongStream.Builder add(long) 添加一个long值到构建器
LongConsumer andThen(LongConsumer) 组合两个LongConsumer
LongStream build() 构建LongStream
boolean equals(Object)
int hashCode()
null toString()

Stream 流

static Stream.Builder builder() 创建Stream构建器
static Stream concat(Stream, Stream) 连接两个流
static Stream empty() 创建空流
static Stream of(def[]) 由数组创建流
boolean allMatch(Predicate) 所有元素都匹配Predicate
boolean anyMatch(Predicate) 至少一个元素匹配Predicate
void close()
def collect(Collector) 收集流元素
def collect(Supplier, BiConsumer, BiConsumer) 使用自定义收集器收集流元素
long count() 计数
Stream distinct() 去重
boolean equals(Object)
Stream filter(Predicate) 过滤
Optional findAny() 查找任意一个元素
Optional findFirst() 查找第一个元素
Stream flatMap(Function) 扁平化映射
DoubleStream flatMapToDouble(Function) 扁平化映射到DoubleStream
IntStream flatMapToInt(Function) 扁平化映射到IntStream
LongStream flatMapToLong(Function) 扁平化映射到LongStream
void forEach(Consumer) 遍历每个元素
void forEachOrdered(Consumer) 按顺序遍历每个元素
int hashCode()
boolean isParallel()
Iterator iterator()
Stream limit(long) 限制元素数量
Stream map(Function) 映射
DoubleStream mapToDouble(ToDoubleFunction) 映射到DoubleStream
IntStream mapToInt(ToIntFunction) 映射到IntStream
LongStream mapToLong(ToLongFunction) 映射到LongStream
Optional max(Comparator) 查找最大值
Optional min(Comparator) 查找最小值
boolean noneMatch(Predicate) 没有元素匹配Predicate
Stream peek(Consumer) 执行一个操作，但不改变流
Optional reduce(BinaryOperator) 规约
def reduce(def, BinaryOperator) 规约，指定初始值
def reduce(def, BiFunction, BinaryOperator) 规约，指定初始值和组合函数
BaseStream sequential()
Stream skip(long) 跳过指定数量的元素
Stream sorted() 排序
Stream sorted(Comparator) 根据Comparator排序
Spliterator spliterator()
def[] toArray() 转换为数组
def[] toArray(IntFunction) 使用自定义函数转换为数组
null toString()
BaseStream unordered()

Stream.Builder Stream构建器

void accept(def) 接收一个对象
Stream.Builder add(def) 向构建器添加一个对象
Consumer andThen(Consumer) 组合两个Consumer
Stream build() 构建Stream
boolean equals(Object)
int hashCode()
null toString()

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