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    <p>Basically, Java collection classes like <code>Vector</code>, <code>ArrayList</code>, <code>HashMap</code>, etc. don't take primitive types, like <code>int</code>.</p> <p>In the olden days (pre-Java 5), you could not do this:</p> <pre><code>List myList = new ArrayList(); myList.add(10); </code></pre> <p>You would have to do this:</p> <pre><code>List myList = new ArrayList(); myList.add(new Integer(10)); </code></pre> <p>This is because <code>10</code> is just an <code>int</code> by itself. <code>Integer</code> is a class, that wraps the <code>int</code> primitive, and making a <code>new Integer()</code> means you're really making an object of type <code>Integer</code>. Before autoboxing came around, you could not mix <code>Integer</code> and <code>int</code> like you do here.</p> <p>So the takeaway is:</p> <p><code>integerBox.add(10)</code> and <code>integerBox.add(new Integer(10))</code> will result in an <code>Integer</code> being added to <code>integerBox</code>, but that's only because <code>integerBox.add(10)</code> transparently creates the <code>Integer</code> for you. Both ways may not necessarily create the <code>Integer</code> the same way, as one is explicitly being created with <code>new Integer</code>, whereas autoboxing will use <code>Integer.valueOf()</code>. I am going by the assumption the tutorial makes that <code>integerBox</code> is some type of collection (which takes objects, and not primitives).</p> <p>But in this light:</p> <pre><code>int myInt = 10; Integer myInteger = new Integer(10); </code></pre> <p>One is a primitive, the other is an object of type <code>Integer</code>.</p>
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    1. CODownvote because the paragraph under the "so the takeaway is" section is wrong. integerBox.add(10) is not equivalent to integerBox.add(new Integer(10)) - one creates an integer all the time, one does not always (and usually doesn't) create an integer.
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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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