my file contains this string:
a b c now I want to read it and split it with empty line so I have this:
text.split("\n\n"); where text is output of file problem is that this doesnt work. When I convert new line to byte I see that "\n\n" is represented as 10 10 but new line in my file is represented by 10 13 10 13. So how I can split my file ?
Escape Description ASCII-Value \n New Line Feed (LF) 10 \r Carriage Return (CR) 13 So you need to try string.split("\n\r") in your case.
If you want to split by empty line, try \n\r\n\r. Or you can use .readLine() to read your file, and skip all empty lines.
Are you sure it's 10 13 10 13? It always should be 13 10...
And, you should not depend on line.separator too much. Because if you are processing some files from *nix platform, it's \n, vice versa. And even on Windows, some editors use \n as the new line character. So I suggest you to use some high level methods or use string.replaceAll("\r\n", "\n") to normalize your input.
\n\r like on the Acorn BBC (en.wikipedia.org/wiki/BBC_Micro)
line.separator too much. Because if you process some file from *nix, it's \n, vice versa. And even on Windows, some editors use \n as the new line character.
Keep in mind, sometimes you have to use:
System.getProperty("line.separator"); to get the line separator, if you want to make it platform independent. You can also use BufferedWriter's newLine() method, that takes care of that automatically.
Try using:
text.split("\n\r"); Why are you splitting on \n\n?
You should be splitting on \r\n because that's what the file lines are separated by.
Try to use regular expressions, something like:
text.split("\\W+"); text.split("\\s+"); 
"a b c\r\n\r\nd".split("\\s+") returns ["a", "b", "c", "d"], it does not fit OP's requirement.LF: Line Feed, U+000A CR: Carriage Return, U+000D so you need to try to use "string".split("\r\n"); One Solution is to Split using "\n" and neglect empty Strings
List<String> lines = text.split("\n"); for(String line : lines) { line = line.trim(); if(line != "") { System.out.println(line); } } 
split returns String[]. And why do you compare strings using !=?