Is there possibility of sum of ArrayList without looping
<p>Is there possibility of sum of <code>ArrayList</code> without looping?</p>

<p>PHP provides <code>sum(array)</code> which will give the sum of array.</p>

<p>The PHP code is like</p>

<pre><code>$a = array(2, 4, 6, 8);
echo "sum(a) = " . array_sum($a) . "\n";
</code></pre>

<p>I wanted to do the same in Java:</p>

<pre><code>List tt = new ArrayList();
tt.add(1);
tt.add(2);
tt.add(3);
</code></pre>
