Java String split("|" ) method call not working correctly [duplicate]

Question

public class SplitStr {

    public static void main(String []args) {
        String str1 = "This | is | My | Account | For | Java|";
        String str2 = "This / is / My / Account / For / Java/";
       // String[] arr = str.split("|");

        for(String item : str1.split("|")) {
            System.out.print(item);
        }
    }
}

The program is working correctly with String str2 but it is not working with String str1 What are the possible flows in this program?

Answer 1

String#split() expects a regular expression as the first argument and | is a control character in regex.

To make regex parser understand that you mean to split by the literal |, you need to pass \| to the regex parser. But \ is a control character in Java string literals. So, to make Java compiler understand that you want to pass \| to the regex parser, you need to pass "\\|" to the String#split() method.