Sun Certification Training Guide (310-025, 310-027): Java™ 2 Programmer and Developer Exams

Throwing and Catching Exceptions

Java provides superior support for runtime error and exception handling, enabling programs to check for anomalous conditions and respond to them with minimal impact on the normal flow of program execution. This allows error- and exception-handling code to be added easily to existing methods.

Exceptions are generated by the Java runtime system in response to errors that are detected as classes are loaded and their methods are executed. The runtime system is said to throw these runtime exceptions. Runtime exceptions are objects of the classes java.lang. RuntimeException, java.lang.Error, or of their subclasses. Runtime exceptions are also referred to as unchecked exceptions. Errors are used to identify serious conditions ...