List<A> aList;
List<B> bList; // aList is larger than bList

for (int i=0; i<bList.size(),i++) {
  aList.get(i).doSomethingWith(bList.get(i));
}

for (int j=i; j<aList.size(),j++) {
  aList.get(j).doSomething();
}

解决方法@H_404_8@

您需要并行处理这两个列表,所以我认为您不能自己流式传输列表.但是,您可以流式传输索引并对其进行处理：

IntStream.range(0,aList.size())
    .parallel()
    .forEach(i -> {
        if (i < bList.size()) aList.get(i).doSomethingWith(bList.get(i));
        else aList.get(i).doSomething();
    });