Exceptions

The Java™ language uses exceptions to provide error-handling capabilities for its programs. An exception is an event that occurs when you run your program that disrupts the normal flow of instructions.

The Java runtime system and many classes from Java packages throw exceptions in some circumstances by using the throw statement. You can use the same mechanism to throw exceptions in your Java programs.

• SQLException
  The SQLException class and its subtypes provide information about errors and warnings that occur while a data source is being accessed.
• SQLWarning
  Methods in some interfaces generate an SQLWarning object if the methods cause a database access warning.
• DataTruncation and silent truncation
  DataTruncation is a subclass of SQLWarning. While SQLWarnings are not thrown, DataTruncation objects are sometimes thrown and attached like other SQLWarning objects. Silent truncation occurs when the size of a column exceeds the size specified by the setMaxFieldSize statement method, but no warning or exception is reported.