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And I'm on eclipse Juno SR1

This doesn't guarantee this is what eclipse is using, but in my case, they are the same:

C:\Users\kworkman>java -version
java version "1.7.0_51"
Java(TM) SE...

Stranger still, that's exactly what I'm running, yet we get different output?

(I'm using Java 7 update 51)

This is an interesting question. I'll try to expand on your question (questions should always come with an SSCCE whenever possible)...

Take this code for example:


import java.io.File;
...