Binarytree code java

Question

What’s wrong with my code
I tried to solve the problem it and it didn’t work in netbeans

https://code.sololearn.com/cUDqJkrK0lbq/?ref=app

Answer 1

delete last } in code

then change
// public void static main(String[] args) {
public static void main(String[] args) {

Answer 2

Nothing change

Answer 3

yes, at the end of your code you have stil
}}}
instead of
}}