ConnectExceptionConnectException
A connection to a remote host cannot be established.
ObjectStreamExceptionAn exception occurred during Java object serialization or deserialization.
This is the superclass for serialization-related exceptions. Issues include incompatible class versions (serialVersionUID mismatch), non-serializable fields, or corrupted serialized data.
Ensure all serializable classes have a serialVersionUID. Make fields transient if they should not be serialized. Handle class version changes carefully.
ConnectExceptionA connection to a remote host cannot be established.
SQLExceptionA database access error occurs during SQL operations.
InstantiationExceptionAn attempt to create an instance of an abstract class or interface using reflection.
IllegalStateExceptionA method is called at an inappropriate time or the object is in an invalid state.
IncompatibleClassChangeErrorA class has changed in an incompatible way since the calling code was compiled.
ArrayIndexOutOfBoundsExceptionAn array is accessed with an index that is negative or greater than or equal to the array length.