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Many programmers, particularly when first introduced to Java, have
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| Top Ten Errors Java Programmers Make - Many programmers, particularly when first introduced to Java, have
Top Ten Errors Java Programmers Make
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Top Ten Errors Java Programmers Make
(How to spot them. How to fix/prevent them.)
By David Reilly
Whether you program regularly in Java, and know it like the back of
your hand, or whether you're new to the language or a casual programmer,
you'll make mistakes. It's natural, it's human, and guess what? You'll
more than likely make the same mistakes that others do, over and over
again. Here's my top ten list of errors that we all seem to make at one
time or another, how to spot them, and how to fix them.
10. Accessing non-static member variables from static methods (such
as main)
problems with accessing member variables from their main
method. The method signature for main is marked static - meaning that we
don't need to create an instance of the class to invoke the main method.
For example, a Java Virtual Machine (JVM) could call the class
MyApplication like this :-
MyApplication.main ( command_line_args );
This means, however, that there isn't an instance of MyApplication -
it doesn't have any member variables to access! Take for example the
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