How split() works in Java ???

Question

https://code.sololearn.com/c3a6vWhI0UYi/?ref=app

Answer 1

You should print the array, then you will see it:
welcome@to@solo@learn
inside your array after split("@"):
[welcome, to, solo, learn] (that's why length = 4)

Another example:
String str = "hello world";
String[] arr = str.split(" ");
-> [hello, world]

Answer 2

Btw: you askes this question twice
https://www.sololearn.com/Discuss/1808922/?ref=app

Answer 3

It is the limit. You should read the article in kiRA post. There are some examples using positive and negative limit.

Answer 4

What does the second argument in the example code specifies???