"ManWithoutFace" wrote : | I'm using Ant in IDE Eclipse Europe. Are you sure Eclipse/Ant is not using a different JDK version for compiling your classes? The output you posted looks fine to me as long as the same version of java is being used by Eclipse/Ant to compile your classes. I suspect Eclipse might be using a different version. I dont have Eclipse open in front of me right now, but if i remember correctly, the Project -> Java Compiler -> Compiler Compliance level gives you an option of specifying the version of Java you want your compiled files to be compliant with. Set it to Java version 5. I believe Ant uses these properties along with the JDK set in Eclipse Workspace->Preference settings to compile the classes. Let us know how it goes. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4102961#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...