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POStore MATLAB class instance into java.util.HashMap
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/436852/storing-matlab-structs-in-java-objects">Storing MATLAB structs in Java objects</a> </p> </blockquote> <p>I'm currently using <a href="http://www.mathworks.com/help/techdoc/ref/containers_map.html" rel="nofollow noreferrer"><code>containers.Map</code></a> to associate keys and values in MATLAB. However, quick tests show that this class is really slow compared to <code>java.util.HashMap</code>. The documentation does not specify the algorithmic complexity for storage and retrieval, so I'm scared it's not using a hash table, and I really need flat performance (O(1) insertion and retrieval).</p> <p>I've been trying to convert my code using <code>containers.Map</code> to <code>java.util.HashMap</code>, but it doesn't work when I try to insert custom MATLAB class instances into the hash map. For instance, given the following class</p> <pre><code>classdef Bucket &lt; handle % ... application-specific code ... end </code></pre> <p>I can't do this:</p> <pre><code>m = java.util.HashMap(); % association. b = Bucket(); % class instance. k = ...; % some relevant value for association. m.put(k, b); </code></pre> <p>It fails with the error message:</p> <blockquote> <p>??? No method 'put' with matching signature found for class 'java.util.HashMap'.</p> </blockquote> <p>The exact same code works if I replace <code>b</code> with some non-custom class, such as:</p> <pre><code>b = 'foo'; m.put(k, b); </code></pre> <p>How can I store <code>Bucket</code> instances in a <code>java.util.HashMap</code>?</p>
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