eclipse magic: … Syntax error, varargs are only available if source level is 1.5 or greater

Question

Yesterday I made a project in eclipse, and it was working, compiling. I used Eclipse Galileo for Java EE. Today I open eclipse and see lots of errors saying that stuff is no

Answer 1

Try this:

Go to your project's Properties, set the Java Compiler compliance level to 1.6, let it rebuild the project, then switched back to 1.7 and rebuild it again.

It worked for me :)