[java] Eclipse error: "The import XXX cannot be resolved"

I had a similar problem on an import statement not resolving. I tried many of the solutions offered in this discussion, but none of them solved my problem. I eventually figured out what was happening in my case so I'll share what I discovered.

If you add a jar to your build path and that jar is an OSGI bundle (a jar with a MANIFEST.MF file containing OSGI header statements), you cannot import any packages from that jar until you satisfy all Import-Packages requirements. Your only clue that this is happening is that you can't import packages from that bundle, even though it looks like the library is properly included in your project build path. Optional imported packages still need to be satisfied at compile time. Optional packages are allowed to be missing at runtime. Well that's for sure true if you're using the bundle in a OSGI framework, I'm not sure if that's true if you not using the bundle in a OSGI framework.

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