Stream 上的 collect 操作是否会关闭流和底层资源? [英] Does collect operation on Stream close the stream and underlying resources?

问题描述

以下代码是否需要包含在 try-with-resources 中以确保关闭底层文件?

Does below code need to be wrapped in try-with-resources to make sure underlying file is closed?

List<String> rows = Files.lines(inputFilePath).collect(Collectors.toList());

推荐答案

作为重载的javadoc Files#lines(Path, Charset) 方法状态

As the javadoc of the overloaded Files#lines(Path, Charset) method states

返回的流封装了一个Reader.如果及时处理文件需要系统资源，try-with-resources 构造应该用于确保流的关闭方法在流操作完成.

The returned stream encapsulates a Reader. If timely disposal of file system resources is required, the try-with-resources construct should be used to ensure that the stream's close method is invoked after the stream operations are completed.

所以是的，将 lines 返回的 Stream 包装在 try-with-resources 语句中.(或关闭它.)

So yes, wrap the Stream returned by lines in a try-with-resources statement. (Or close it appropriately.)

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