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copied!<p>If you're unsure about something, try writing a test first.</p> <p>I did this:</p> <pre class="lang-java prettyprint-override"><code>//primitive System.out.println(int.class.getName()); System.out.println(int.class.getCanonicalName()); System.out.println(int.class.getSimpleName()); System.out.println(); //class System.out.println(String.class.getName()); System.out.println(String.class.getCanonicalName()); System.out.println(String.class.getSimpleName()); System.out.println(); //inner class System.out.println(HashMap.SimpleEntry.class.getName()); System.out.println(HashMap.SimpleEntry.class.getCanonicalName()); System.out.println(HashMap.SimpleEntry.class.getSimpleName()); System.out.println(); //anonymous inner class System.out.println(new Serializable(){}.getClass().getName()); System.out.println(new Serializable(){}.getClass().getCanonicalName()); System.out.println(new Serializable(){}.getClass().getSimpleName()); </code></pre> <p>Prints:</p> <pre> int int int java.lang.String java.lang.String String java.util.AbstractMap$SimpleEntry java.util.AbstractMap.SimpleEntry SimpleEntry ClassnameTest$1 null </pre> <p>There's an empty line in the last block where <code>getSimpleName</code> returns an empty string.</p> <p>The upshot looking at this is:</p> <ul> <li>the <strong>name</strong> is the name that you'd use to dynamically load the class with, for example, a call to <code>Class.forName</code> with the default <code>ClassLoader</code>.</li> <li>the <strong>canonical name</strong> is the name that would be used in an import statement and uniquely identifies the class. Might be useful during <code>toString</code> or logging operations.</li> <li>the <strong>simple name</strong> loosely identifies the class, again might be useful during <code>toString</code> or logging operations but is not guaranteed to be unique.</li> </ul>

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