Confusing output from String.split

Question

I do not understand the output of this code:

public class StringDemo{              
    public static void main(String args[]) {
        String blank = \"\";         


        

Answer 1

String blank = "";                    
String comma = ",";                   
System.out.println("Output1: "+blank.split(",").length);  // case 1
System.out.println("Output2: "+comma.split(",").length);  // case 2

case 1 - Here blank.split(",") will return "" since there is no , in blank you get the same, So length will be 1

case 2- Here comma.split(",") will return empty array, you have to scape , if you want to count comma with length 1 else length will be 0

Again comma.split(",") split() expecting a regex as argument it will return result array to matching with that regex.

The array returned by this method contains each substring of this string that is terminated by another substring that matches the given expression or is terminated by the end of the string.

Else

If the expression does not match any part of the input then the resulting array has just one element, namely this string.