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    <p>I come from a C++ background where the rules are a bit different from Java, but I think these two-stage initialization principles apply in the general case.</p> <p><strong>Construction</strong></p> <ol> <li>Everything that <em>can</em> be done at construction time <em>should</em> be done at construction time.</li> <li>Minimize the amount of "badness" that can result from trying to use your object before calling <code>init()</code>.</li> <li>All member variables need a value, even if it's a normally invalid sentry value (e.g., set pointers to null). I think Java will initialize all variables to zero by default, so you need to pick something else if that's a valid number.</li> </ol> <p><strong>Initialization</strong></p> <ol> <li>Initialize those member variables that depend on the existence of other objects. Basically, do the things you couldn't do at construction time.</li> <li>Ensure your object is now in a complete, ready-to-use state. Consider throwing an exception if it isn't.</li> </ol> <p><strong>Reset</strong></p> <ol> <li>Think long and hard about what state The System will be in when you'd want to call such a function. It may be better to create a new object from scratch, even if that operation seems expensive. Profile your code to find out if that's a problem.</li> <li>Assuming you got past item 1, consider writing a method to handle the things that both <code>reset()</code> and your constructor need to do. This eases maintenance and avoids code duplication.</li> <li>Return your object to the same state it was in after <code>init()</code>.</li> </ol>
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    1. POWhat are the best practices for determining the tasks of Constructor, Initialization and Reset methods
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    1. USMichael Kristofik
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