java - File.createTempFile 检查文件是否存在？

Question

如果我用这个方法，碰巧有一个同名的临时文件，这个文件被覆盖了？我说的是一个会在很长一段时间内生成许多临时文件的应用程序。

Answer 1

来自 createTempFile ( here ) 上标记为 2 的 JavaDoc，

Neither this method nor any of its variants will return the same abstract pathname again in the current invocation of the virtual machine.

编辑

返回部分说

An abstract pathname denoting a newly-created empty file

而且，它进一步指出

Creates a new empty file in the specified directory, using the given prefix and suffix strings to generate its name. If this method returns successfully then it is guaranteed that: The file denoted by the returned abstract pathname did not exist before this method was invoked