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Java	05-16-2010 05:27 PM

Exception in thread "main" java.lang.NullPointerException error

This is a code to solve a maze using A* search algorithm. When I run it, it gives me the following error: Exception in thread "main" java.lang.NullPointerException Can someone help me out? Below is all the code: <div class="codeblock"> <div class="spaced"> <div>

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