Do you rise to the challenge !?

Question

You are given a sequence of characters consisting of parentheses () and brackets []. A string of this type is said to be correct :
if it is an empty or null string, the string A is correct, (A) & [A] are correct and if the string A and B are correct, the concatenation AB is also correct
Exp : [()] & (()[]) are correct, ([)] & (( aren't correct

Implement the method check(String str) to check the correctness of a string of this type. check returns true if the string is correct, false otherwise.
https://code.

Answer 1

https://code.sololearn.com/c0GdAuz1dIGN/?ref=app

Check it out. ☺

Answer 2

https://code.sololearn.com/cJ6D4f2j1eCG/?ref=app

Answer 3

classe A {

static boolean check(String str){

}

}