Splitting String in Java with empty elements

Question

I\'m reading from a .csv File line by line. One line could look for example as following: String str = \"10,1,,,,\".

Now I would like to split according to

Answer 1

You need to use it with -1 parameter

String[] splitted = str.split(",", -1);

This has been discussed before, e.g. Java: String split(): I want it to include the empty strings at the end

But split really shouldn't be the way you parse a csv, you could run into problems when you have a String value containing a comma

23,"test,test","123.88"

split would split the row into 4 parts:

[23, "test, test", "123.88"]

and I don't think you want that.

Answer 2

Pass -1 (or any negative number, actually) as a second parameter to split:

System.out.println("0,,,,,".split(",", -1).length); // Prints 6.

Answer 3

split only drops trailing delimeters by default. You can turn this off with

String str = "9,,,1,,";
String[] parts = str.split(",", -1);
System.out.println(Arrays.toString(parts));

prints

[9, , , 1, , ]