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I can’t find the documentation that specifies how a Scanner treats newline patterns by default. I want to read a file line by line and have the scanner be able to handle \r, \n or \r\n line endings regardless of the system the program is actually running on.
If I declare a scanner like so:
Scanner scanner = new Scanner(reader);
what is the default behaviour? Will it handle all three kinds as described above or do I have to tell it explicitly to do it?
Looking at the source code for Sun JDK 1.6, the pattern used is “\r\n|[\n\r\u2028\u2029\u0085]”
which says “\r\n” or any one of \r, \n or the unicode characters for “line separator”, “paragraph separator”, and “next line” respectively.