stream

java.util.Collection#stream

default Stream<E> stream() {

return StreamSupport.stream(spliterator(), false);

}

java.util.stream.StreamSupport#stream(java.util.Spliterator<T>, boolean)

java.util.stream.AbstractPipeline#AbstractPipeline(java.util.Spliterator<?>, int, boolean)

java.util.stream.ReferencePipeline#filter

java.util.stream.AbstractPipeline#AbstractPipeline(java.util.stream.AbstractPipeline<?,E_IN,?>, int)

java.util.stream.ReferencePipeline#map

java.util.stream.AbstractPipeline#AbstractPipeline(java.util.stream.AbstractPipeline<?,E_IN,?>, int)

java.util.stream.ReferencePipeline#collect(java.util.stream.Collector<? super P_OUT,A,R>)

java.util.stream.AbstractPipeline#evaluate(java.util.stream.TerminalOp<E_OUT,R>)

java.util.stream.ReduceOps.ReduceOp#evaluateSequential

java.util.stream.AbstractPipeline#wrapSink

//

java.util.stream.AbstractPipeline#copyInto

spliterator.forEachRemaining(wrappedSink);--执行access

java.util.ArrayList.ArrayListSpliterator#forEachRemaining

流处理和非流处理的区别：

流就好比一两条流水线，一条流水线里有很多操作。

如果是非流就是每个操作是一个流水线，几个操作就几个流水线，时间多了n个操作的倍数。

流和并行流：jdk8的并行流少用，对操作的封装有冗余（浪费了大部分时间）。