Using reflection to change static final File.separatorChar for unit testing?

Question

Specifically, I\'m trying to create a unit test for a method which requires uses File.separatorChar to build paths on windows and unix. The code must run on bot

Answer 1

You can take the source for java.io.File, and modify it so that separatorChar and separator are not final, and add a setSeparatorChar method that updates the two of them, then include the compiled class in your bootclasspath.