The exception-mapping line maps any Exception at all (since all Java Exceptions are descendants of java.lang.Exception) to the "error" result. This result is defined a couple of lines later, and ...

Not sure what a try catch is? We explain how to use a try catch block in Java and how to write methods that throw exceptions.

Don't let the occurrence of a RuntimeException in Java bring your code to a standstill. Here are 10 examples of how to avoid runtime exceptions in Java.

Ever come across the null pointer exception in Java? We explain what this error message means, why it happens, and how to avoid the billion-dollar mistake.

You can add additional information to any Exception object to help you debug your application when something goes horribly wrong.