Java String split() loses string

I would use regex:

raw.split("[\\r\\n]+");

Your code works as expected:

class Test {
    public static void main(String[] args) {
        String raw = "This is my string\n\nThis is a new paragraph\nThis is another line";
        String[] lines = raw.split("\\r?\\n|\\r");
        for (String line : lines) {
            System.out.println(line);
        }
    }
}

This prints:

This is my string

This is a new paragraph
This is another line

It is therefore likely that the problem is with how you examine/display the result of split(), not with the split() itself.

You could clean up that regex liek this:

[\\n\\r]+

the + means it will look for whitespace as far as it can before splitting

chances are there's a big in how you're trying to view the answer or something else, I could help you more if you show some code.

if you want to keep the spaces, try

(?=[\\n\\r]+)

You could use the "multi line" flag and simply split on end-of-line:

lines = raw.split("(?m)$\\s*");

The term \s* consumes the newline characters.

Here's some test code:

String raw  = "This is my string\n\nThis is a new paragraph\nThis is another line";
String[] lines = raw.split("(?m)$\\s*");
System.out.println(Arrays.toString( lines));

Output:

[This is my string, This is a new paragraph, This is another line]