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    <p>Just <a href="http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html#ArrayList%28java.util.Collection%29" rel="nofollow noreferrer">construct</a> a new <code>ArrayList</code> wrapping the keyset of the <a href="http://docs.oracle.com/javaee/6/api/javax/servlet/ServletRequest.html#getParameterMap%28%29" rel="nofollow noreferrer">request parameter map</a>.</p> <pre><code>List&lt;String&gt; parameterNames = new ArrayList&lt;String&gt;(request.getParameterMap().keySet()); // ... </code></pre> <p>I only wonder how it's useful to have it as <code>List&lt;String&gt;</code>. A <code>Set&lt;String&gt;</code> would make much more sense as parameter names are supposed to be <strong>unique</strong> (a <code>List</code> can contain duplicate elements). A <code>Set&lt;String&gt;</code> is also exactly what the map's keyset already represents.</p> <pre><code>Set&lt;String&gt; parameterNames = request.getParameterMap().keySet(); // ... </code></pre> <p>Or perhaps you don't need it at all for the particular functional requirement for which you <a href="https://meta.stackexchange.com/questions/66377/what-is-the-xy-problem">thought</a> that massaging the parameter names into a <code>List&lt;String&gt;</code> would be the solution. Perhaps you <em>actually</em> intented to iterate over it in an enhanced loop, for example? That's also perfectly possible on a <code>Map</code>.</p> <pre><code>for (Entry&lt;String, String[]&gt; entry : request.getParameterMap().entrySet()) { String name = entry.getKey(); String value = entry.getValue()[0]; // ... } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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