You have triggered my curiousity with statement that Java was written in Self. I've tried to find anything about it but I could not (I tried several different queries on google but 'self' and 'java' attracts too much irrelevant web sites). Can you point me to the source of this information?
Java and Self (Was "Obviously, You Will Need a Java Course...")
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Amusingly, you can find out more about Self at this link, which is about the "The Merlin Object-Oriented System", an OS written in Self. You can find links to more information about the Self language at the bottom of the page.
I may have also misunderstood some of the lineage. Apparently, the Self people wrote a Java VM in Self, and found it to be faster than the Sun-produced Java VMs, so that became the basis of Hotspot, which is now at the core of the current Sun Java VM.
Whether any of the Self Java VM code survived intact, I cannot tell.