Splitting a string on the double pipe(||) using String.split()

Question

I'm trying to split the string with double pipe(||) being the delimiter.String looks something like this:

String str ="[email protected]||[email protected]||[email protected]";

i'm able to split it using the StringTokeniser.The javadoc says the use of this class is discouraged and instead look at String.split as option.

StringTokenizer token = new StringTokenizer(str, "||");

The above code works fine.But not able to figure out why below string.split function not giving me expected result..

String[] strArry = str.split("\\||");

Where am i going wrong..?

Answer 1

String.split() uses regular expressions. You need to escape the string that you want to use as divider.

Pattern has a method to do this for you, namely Pattern.quote(String s).

String[] split = str.split(Pattern.quote("||"));

Answer 2

You must escape every single | like this str.split("\\|\\|")