Unclosed Character Class Error?

Question

Here is the error:

Exception in thread \"main\" java.util.regex.PatternSyntaxException: Unclosed character class near index 3
], [
   ^
    at java.util.rege         


        

Answer 1

  .split("], [")
             ^---start of char class
                  end----?

Change it to

.split("], \[")
           ^---escape the [