How to tackle 'illegalstateexception' in java?
The `IllegalStateException` is thrown when one tries to use a method at an inappropriate time, meaning the Java environment or application isn't in an appropriate state for the requested operation.
Example:
ListIterator iterator = list.listIterator();
iterator.remove();
Solution:
ListIterator iterator = list.listIterator();
iterator.next();
iterator.remove();
Ensure that methods are called in the correct sequence and the environment state is ready for the operation.