AkousaIllegalStateExceptionA method is called at an inappropriate time or the object is in an invalid state.
The object is not in the right state for the requested operation. For example, calling next() on an Iterator without first calling hasNext(), or starting a thread that is already running.
Check the object's state before calling the method. Follow the expected method call sequence. Use state machines or flags to track object lifecycle.
IOExceptionAn I/O operation fails or is interrupted.
NoClassDefFoundErrorA class was found at compile time but cannot be loaded at runtime.
ReflectiveOperationExceptionA reflection operation throws an exception.
SQLExceptionA database access error occurs during SQL operations.
StackOverflowErrorThe call stack has exceeded its maximum size, usually due to deep or infinite recursion.
InterruptedExceptionA thread is interrupted while it is waiting, sleeping, or blocked.