Affects Version/s: None
Fix Version/s: 2.1
The file separator character is available from both File.separator and System.getProperty("file.separator").
The former is guaranteed to be a string of length 1, but the latter can be defined as a longer string on the Java command line. Thus the two can be different, but still allow the JVM to start up.
I found the following worked:
for Unix or the equivalent \xyz on Windows.
[Using a different first character does not work - the JVM usually throws an
exception as it cannot find some required files if the sep. is incorrect.]
It looks like only the first character of the property is used by the JVM.
However, this is not done by the application code I have seen, which means that there could be a discrepancy between the two methods.
File.separator has the additional benefit that it is not subject to a privilege
The same reasoning applies to "path.separator" => File.pathSeparator
Commons code should always use the File constants.