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Different operating systems have different file name max lengths. Does Java have any limit on file name length when working with files?
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The maximum length of a pathname is 256 characters, which includes all parent directories and the filename. 255-character mixed-case long filename is possible only for files, or folders with no sub-folders, at the root folder of any drive.
In Windows 10, you can enable long file name support, which allows file names up to 32,767 characters (although you lose a few characters for mandatory characters that are part of the name).
Explanation: The maximum length of the filename is 8 characters in the DOS operating system. It is commonly known as an 8.3 filename.
Linux has a maximum filename length of 255 characters for most filesystems (including EXT4), and a maximum path of 4096 characters.
Java has no maximum file name length, except obviously for the String max length limit (which is the array max length, i.e. Integer.MAX_VALUE). Maybe some JVMs have a lower limit but I never run into such a problem (and I'm almost certain it would be a bug with respect to Java specifications), certainly OSes can have one.
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Windows has a 256 character filename length. Unix has about the same I believe. So while the Java IO may not have a defined length (String length maybe for sure), it would be dependent on the implementation for the operating system.
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