You may get following error when you try to generate JAXB classes from your XSD files within Eclipse IDE.
Error: Could not find or load main class com.sun.tools.internal.xjc.XJCFacade
The reason for this error is that you have configured Eclipse to use JRE instead of JDK. If you add a JDK through Window>Preferences>Java>Installed JREs, and select it as the active JRE, you will probably get rid of this error.
PS. In some situations, which I haven’t fully understand yet, Eclipse insists on using other JRE/JDK configuration other than my current selection. If your error persists after adding JDK, try removing other JRE entries from Installed JREs.