Exception in thread "main" java.lang.StackOverflowError

This error occurs when the stack memory allocated to a program is exhausted due to excessive recursion or nested method calls. It means that the program has gone too deep into the call stack and there is no more space to allocate for additional method calls or local variable storage.

To fix this error, you can try optimizing your code to reduce the number of recursive or nested calls, increasing the stack size using JVM flags, or using iterative solutions instead of recursive ones.