title: Java - Invalid maximum heap size
body: <p>When running project from IntelliJ IDEA I set VM options <code>-XX:MaxPermSize=512m -Xmx=256m -Xms=256m</code> and get the following error</p>
  
  <blockquote>
    <p>Error: Could not create the Java Virtual Machine.<br>
    Error: A fatal exception has occurred. Program will exit.<br>
    Invalid maximum heap size: -Xmx=256m</p>
  </blockquote>