【java8】stream的map和filter怎么混用？

Question

 List<SoReturnPicVO> collect = picList.stream().filter(x -> x.getType() == 1).collect(Collectors.toList());
            List<String> collect2 = collect.stream().map(x -> x.getPicUrl()).collect(Collectors.toList());

我要将实体里的一个字段取出来List-String,但是要根据另一个字段进行判断，我写成了两句，请问怎么能把这两句合并一下，写成一句

Answer 1

 picList.stream().filter(x -> x.getType() == 1).map(x -> x.getPicUrl()).collect(Collectors.toList());