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POWhy isn't List.toArray() generic?
 

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    <p>Why isn't List.toArray() generic? Why must you give the type as an argument (and usually create a new empty instance)?</p> <pre><code>public Object[] toArray() </code></pre> <p><a href="http://docs.oracle.com/javase/7/docs/api/java/util/List.html#toArray()" rel="nofollow noreferrer">http://docs.oracle.com/javase/7/docs/api/java/util/List.html#toArray()</a></p> <hr> <p>Update: I have since learned that generic array creation is not allowed, but I believe that it should be. Is there any reason why it's not allowed?</p> <pre><code>Main.java:28: error: generic array creation T[] ret = new T[size()]; </code></pre> <p><a href="http://ideone.com/3nX0cz" rel="nofollow noreferrer">http://ideone.com/3nX0cz</a></p> <hr> <p>Update: Ok I believe this is the answer:</p> <p><a href="http://docs.oracle.com/javase/tutorial/java/generics/restrictions.html#createArrays" rel="nofollow noreferrer">http://docs.oracle.com/javase/tutorial/java/generics/restrictions.html#createArrays</a></p> <p>Not because it is directly relevant, but indirectly relevant. There is nothing inherently wrong with <code>new T[size()]</code>, where <code>MyList&lt;String&gt;</code> would be turned into <code>new String[size()]</code>, but T could itself be a parameterized type. So if you were to create <code>MyList&lt;Set&lt;Integer&gt;&gt;</code>, then <code>T</code> would equal <code>Set&lt;Integer&gt;</code> and the compiler would try to create <code>new Set&lt;Integer&gt;[size()]</code>, which could lead to the problem in the link when returned. Someone tried to give an answer along these lines but that answer has since been deleted so I forgot who it was.</p>
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    1. COThere is an overloaded version of `toArray` that is generic
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    2. COScroll slightly further down.
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    3. CO@Dgrin91 But you have to pass in an array instance as a parameter, which is what the OP was asking about.
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