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    <p><strong>Why does is declaration of a string variable in Java capitalized?</strong></p> <p>The <code>String</code> type is capitalized because it is a <strong>class</strong>, like <code>Object</code>, not a primitive type like <code>boolean</code> or <code>int</code> (the other types you probably ran across).</p> <p>As a class, the <code>String</code> follows the <a href="http://www.oracle.com/technetwork/java/codeconventions-135099.html" rel="nofollow">Naming Convention for Java</a> proposed by Sun. In short, that coding style dictates that <strong>UpperCamelCase</strong> be used for classes (<em>"Class names should be nouns, in mixed case with the first letter of each internal word capitalized"</em>) and <strong>lowerCamelCase</strong> be used for instances and methods.</p> <p><strong>What's the basic difference between <code>String</code> and the primitive types?</strong></p> <p>As an object, a <code>String</code> has some advantages, like properties and methods that can be called directly to them (like the famous <code>length()</code>, <code>replace()</code> and <code>split()</code>). None of the primitive types have that.</p> <p><strong>What about wrapper classes?</strong></p> <p>The other primitive types have equivalent <strong><em>wrapper</em></strong> classes, like <code>Integer</code> for <code>int</code> and <code>Boolean</code> for <code>boolean</code>. They will allow you additional functions.</p> <p>Since Java 1.5, the conversion from an <code>int</code> to an <code>Integer</code> is made <em>almost</em> seamlessly. This is called <a href="http://docs.oracle.com/javase/tutorial/java/data/autoboxing.html" rel="nofollow">autoboxing</a>.</p>
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    1. COWhat about the static methods in the wrapper classes?
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    2. CO@gparyani I added a comment about them. If not enough, I could elaborate.
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    3. COI'm talking about the *static* methods in the wrapper classes, like `Integer.toString(int)` and `Character.isLetter(char)`.
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