title: Java GUI look and feel changes
body: <p>I'm new to programming, but I'm preparing to write a Java program. As I'm planning it, I'm trying to find the right GUI for it. I found <a href="http://javabyexample.wisdomplug.com/java-concepts/37-core-java/65-20-free-look-and-feel-libraries-for-java-swings.html" rel="nofollow noreferrer">this</a> page with GUI options. I have two questions:</p>
  
  <ol>
  <li>Will these just plug into the Java GUI builder?</li>
  <li>How easy (or hard) is it to change the GUI look and feel after the program is built?</li>
  </ol>