public String getHostnameTheme() {
        return this.hostnameTheme;
    }
<p>
The stack's new host name theme, with spaces replaced by underscores. The theme is used to generate host names
for the stack's instances. By default, <code>HostnameTheme</code> is set to <code>Layer_Dependent</code>, which
creates host names by appending integers to the layer's short name. The other themes are:
</p>
<ul>
<li>
<p>
<code>Baked_Goods</code>
</p>
</li>
<li>
<p>
<code>Clouds</code>
</p>
</li>
<li>
<p>
<code>Europe_Cities</code>
</p>
</li>
<li>
<p>
<code>Fruits</code>
</p>
</li>
<li>
<p>
<code>Greek_Deities_and_Titans</code>
</p>
</li>
<li>
<p>
<code>Legendary_creatures_from_Japan</code>
</p>
</li>
<li>
<p>
<code>Planets_and_Moons</code>
</p>
</li>
<li>
<p>
<code>Roman_Deities</code>
</p>
</li>
<li>
<p>
<code>Scottish_Islands</code>
</p>
</li>
<li>
<p>
<code>US_Cities</code>
</p>
</li>
<li>
<p>
<code>Wild_Cats</code>
</p>
</li>
</ul>
<p>
To obtain a generated host name, call <code>GetHostNameSuggestion</code>, which returns a host name based on the
current theme.
</p>

@return The stack's new host name theme, with spaces replaced by underscores. The theme is used to generate host
        names for the stack's instances. By default, <code>HostnameTheme</code> is set to
        <code>Layer_Dependent</code>, which creates host names by appending integers to the layer's short name.
        The other themes are:</p>
        <ul>
        <li>
        <p>
        <code>Baked_Goods</code>
        </p>
        </li>
        <li>
        <p>
        <code>Clouds</code>
        </p>
        </li>
        <li>
        <p>
        <code>Europe_Cities</code>
        </p>
        </li>
        <li>
        <p>
        <code>Fruits</code>
        </p>
        </li>
        <li>
        <p>
        <code>Greek_Deities_and_Titans</code>
        </p>
        </li>
        <li>
        <p>
        <code>Legendary_creatures_from_Japan</code>
        </p>
        </li>
        <li>
        <p>
        <code>Planets_and_Moons</code>
        </p>
        </li>
        <li>
        <p>
        <code>Roman_Deities</code>
        </p>
        </li>
        <li>
        <p>
        <code>Scottish_Islands</code>
        </p>
        </li>
        <li>
        <p>
        <code>US_Cities</code>
        </p>
        </li>
        <li>
        <p>
        <code>Wild_Cats</code>
        </p>
        </li>
        </ul>
        <p>
        To obtain a generated host name, call <code>GetHostNameSuggestion</code>, which returns a host name based
        on the current theme.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/UpdateStackRequest.java