如何在Iterable上执行Stream功能? [英] How to perform Stream functions on an Iterable?
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问题描述
在Java 8中, Stream
类没有任何方法来包装 Iterable
。
In Java 8, the Stream
class does not have any method to wrap a an Iterable
.
相反,我从 Iterable
获取 Spliterator
然后从 StreamSupport
获取 Stream
,如下所示:
Instead, I am obtaining the Spliterator
from the Iterable
and then obtaining a Stream
from StreamSupport
like this:
boolean parallel = true;
StreamSupport.stream(spliterator(), parallel)
.filter(Row::isEmpty)
.collect(Collectors.toList())
.forEach(this::deleteRow);
是否有其他生成方法 Stream
在我错过的 Iterable
上的操作?
Is there some other way of generating Stream
operations on an Iterable
that I am missing?
推荐答案
我的类似问题标记为重复,但这里是我用来避免一些样板的辅助方法:
My similar question got marked as duplicate, but here is the helper methods I've used to avoid some of the boilerplate:
public static <T> Stream<T> stream(Iterable<T> in) {
return StreamSupport.stream(in.spliterator(), false);
}
public static <T> Stream<T> parallelStream(Iterable<T> in) {
return StreamSupport.stream(in.spliterator(), true);
}
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