You will have to set the
language value in your template to Java. There are two ways you can do this:
If you are using iReport, select the root object in your Report Inspector (the one with the same name as your report). Then in the Properties window, select Java from the Languages drop-down.
If you are editing the raw mark-up in the JRXML file, remove
language="groovy"from the file altogether.
Then try to recompile – you should be sorted. 🙂