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affordable tomcat servlets affordable tomcat servlets This is at least preferable to unhandled exceptions in most programming languages where the entire system can come crashing down around your feet with a core dump or worse. Sometimes you may want to this too. In that case you can call the System.exit(int) method to halt your running program. Other times you may just break out of a loop you were in and continue with the rest of your code.

affordable tomcat servlets This is most common when an exception isn't really unexpected or when it doesn't badly affect your program logic. You may or may not print an error message. If you write an exception handler and you don't expect it to be called, then by all means put a System.out.println("Error: " + e);in your exception handler.

affordable tomcat servlets That way if something does go wrong (and something always does) you'll at least know where it went wrong. However don't put an error message in exception handlers you expect to be exercised in the course of normal program flow. Remember, they're exceptions, not errors.In the next section we'll see lots of examples of code that can possibly generate exceptions which must be caught. We'll talk more about exceptions in a later chapter, but this is the bare bones you need to know to respond to the exceptions generated by the java.

affordable tomcat servlets io classes we'll be discussing in the next section.File I/O and StreamsSometimes you write data to a file instead of the computer screen. Under Unix and DOS you can sometimes do this using the redirection operators < and >. However sometimes you need a more fine-grained approach that writes only certain data to a file while still putting other data on the screen. Or you may need access to multiple files simultaneously.

affordable tomcat servlets

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affordable tomcat servlets