Properties file : Use key as variable
<p>I want to use a key defined in properties file as a variable like this :</p>

<pre><code>key1= value1
key2= value2
key3= key1
</code></pre>

<p>I try : </p>

<pre><code>key3= {key1}
</code></pre>

<p>or</p>

<pre><code>key3= ${key1}
</code></pre>

<p>But it dosn't work !</p>

<p>Any idea please ?</p>
