class="block">String added between key and value; needs to include the "equals character"
 (either '=' or ':', both allowed by Java Properties specification), may
 also include white before and/or after "equals character".</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a 