title: How to use variables inside an MVEL expression?
body: <p>I have pre-defined variables in my Java code which I want to use inside an MVEL expression. I don't want to pass a context. </p>
  
  <pre><code>String Col1 = "C";
  String Col2 = "D";
  String expression = "Col1 == 'C' &amp;amp;&amp;amp; Col2 == 'D'";
  
  Boolean result = (Boolean) MVEL.eval(expression);
  </code></pre>
  
  <p>How do I read the variable values and evaluate the expression to true or false?</p>