 and when assigning an&nbsp;<b>NON-NULL</b> value.</p>

            <p><code class="hljs"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Computer</span></span> {<br />
	  &nbsp; &nbsp; &nbsp;<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">HardDrive</span></span> {<br />
	  &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="hljs-keyword">final</span> <span class="hljs-keyword">static</spa