tly; there is no
appropriate default implementation for the <code>draw()</code> method.
For more detailed information about abstract classes, see
<a href="../../MissingPage.html">missing page</a>.
<p>
To specify that your class is an abstract class, use the keyword
<code>abstract</code> in the "modifiers clause" that appears
before the <code>class</code> keyword.
<blockquote>
<pre>
abstract class GraphicObject {
    . . .
}
</pre>
</blockquote>
The compiler will print an error message if there are no abstra