Throwing Errors
Throwing Errors
- In Java terms, errors are
thrown to an event handler which catches it and
processes it.
- Thus, exception objects are always instances of
the Throwable class and can be thrown from a routine
to an error handler. In the following example, we see that the
readLine() method might throw an IOException error object if it has
trouble reading a line.
public String readLine() throws IOException
- It is also of interest to know that a
method may throw multiple errors by listing them as a comma separated
list after the "throws" keyword.
- Of course, a method may perform correctly without
throwing an error. The throws portion just allows the method to deal
with the "other" cases.
- You can also throw your own error objects including both those available through the JDK as well as ones you create yourself.
Additional Resources:
- Learning to Write Java
- Introducing Java (TM) - Your First Applet
- Java FAQs
- Java Software
- java.sun.com
- Sun Microsystems
Error HandlingTable of Contents
Catching Errors
