java - nio.file 中默认的 StandardOpenOptions 是什么？

Question

来自this oracle java教程:

The OpenOptions Parameter

Several of the methods in this section take an optional OpenOptions parameter. This parameter is optional and the API tells you what the default behavior is for the method when none is specified.

这些是API他们指的是。

在没有指定任何 StandardOpenOption 的情况下，我无法找出文件创建的行为。默认的StandardOpenOption是什么？

提前致谢。

Answer 1

正如教程所述，使用 OpenOptions 的各个方法定义了它们的默认值。

例如。 Files.newBufferedWriter定义以下默认值:

If no options are present then this method works as if the CREATE, TRUNCATE_EXISTING, and WRITE options are present. In other words, it opens the file for writing, creating the file if it doesn't exist, or initially truncating an existing regular-file to a size of 0 if it exists.