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POJava Dynamic Factory
 

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    <p>I only have about half a year of java experience, so please excuse my lack of knowledge. I tried doing some google searches, and I have some ideas on this, there are just a few holes that I need to fill in.</p> <p>I am trying to create a 'Dynamic Factory' for a program I am doing. The basis of this is that I want people to be able to insert class files into a folder, and they will be loaded into my factory to create new instances of them later.</p> <p>This is what I have right now:</p> <pre><code>import java.util.HashMap; import java.util.Map; public class KitManager { private Map&lt;String, Class&lt;? extends Kit&gt;&gt; kitMap; public KitManager() { kitMap = new HashMap&lt;String, Class&lt;? extends Kit&gt;&gt;(); } public Kit makeKit(String kitname) { try { return kitMap.get(kitname).newInstance(); } catch (Exception e) { e.printStackTrace(); return null; } } } </code></pre> <p>Now what I am trying to figure out is how to get all the classes inside of a folder, make sure that they extend Kit, and then insert them into the Map to have instances of them created later. This is where I am stuck, I cannot think of a good way to have the classes loaded into the map without having the class names and lookup strings identified somewhere in a config. The idea that I had was to have static code inside each class that would insert itself into the HashMap, but I am not exactly sure how that would work. All I am really asking for is an idea on how to go about accomplishing my goal. (Having a folder that users can input classes into (that extend Kit), and then have those classes dynamically load into my kitMap when my program is loaded)</p>
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