Java 6 and SwingUtilities2
java, swing
Solution
If you have absolutely no other choice, then you should figure out exactly what it was that the class is using from SwingUtilities2, and then make proxies for that functionality in your own SwingUtilities2. You can then stick it in your own com.sun.java.swing package, which will overlap with the original one, and if the same class loader that loads your component is also aware of SwingUtilities2, then the one will see the other and your application will work.
Depending on what the component is, and what it used out of SwingUtilities2, this could be significantly harder than upgrading it or even rewriting it.
Problem
There is component within the application that uses com.sun.java.swing.SwingUtilities2 Now I understand that this class shouldn't be used, but it's a component within the system that uses it. Therefore since it's no longer available in Java 6 I get a NoClassDefFoundError. How can I get around this issue without having to upgrade the component as I don't yet know if that's an option.