java Files.move REPLACE_EXISTING 无法解析为变量
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Files.move REPLACE_EXISTING cannot be resolved to a variable
提问by phil294
The documentation of Files.move(Path source, Path target, CopyOption... options)says:
的文档Files.move(Path source, Path target, CopyOption... options)说：
Alternatively, suppose we want to move a file to new directory, keeping the same file name, and replacing any existing file of that name in the directory:
Path source = ... Path newdir = ... Files.move(source, newdir.resolve(source.getFileName()), REPLACE_EXISTING);
或者，假设我们要将文件移动到新目录，保持相同的文件名，并替换目录中该名称的任何现有文件：
Path source = ... Path newdir = ... Files.move(source, newdir.resolve(source.getFileName()), REPLACE_EXISTING);
Why do I get an error in the following code then?
为什么我在下面的代码中得到一个错误呢？
Files.move(Paths.get("outputFilePath"), Paths.get("inputFilePath"), REPLACE_EXISTING);
REPLACE_EXISTING cannot be resolved to a variable
REPLACE_EXISTING 无法解析为变量
回答by fge
You have to either write:
你必须要么写：
StandardCopyOption.REPLACE_EXISTING
or:
或者：
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
Note that you may also try and StandardCopyOption.ATOMIC_MOVEif you can
请注意，您也可以尝试，StandardCopyOption.ATOMIC_MOVE如果可以
回答by Reimeus
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
.......
回答by Alex
The documentation says its an argument of interface type java.nio.file.CopyOption, which has this implementation (an enum) that you're probably looking for: java.nio.file.StandardCopyOptionwhich has a definition for StandardCopyOption.REPLACE_EXISTING
文档说它是 interface type 的一个参数java.nio.file.CopyOption，它具有您可能正在寻找的这个实现（一个枚举）：java.nio.file.StandardCopyOption它有一个定义StandardCopyOption.REPLACE_EXISTING
