Oracle's co-chief executive Safra Catz reportedly told a San Francisco jury hearing the firm's suit against Google that this had had a very negative impact.

She also claimed Oracle had offered Jeff Bezos Amazon a 97.5 per cent discount to use Java for its Paperwhite e-reader after Amazon switched from Java, which it had used on Kindle, to Android for its Fire device.

Oracle swooped after IBM demurred on picking up Sun for its hardware server and storage business, to deliver the hardware part of the full Oracle stack chief executive Larry Ellison had so long wanted, and Java.

Sun was a shell of a company, having spent a decade failing to extricate itself from the dot-com crash of the 2000s and reporting nothing but losses.

And yet that was small change for Sun, which lived on systems and server revenue of multiples of billions of dollars - despite losses.

Harmony was fully supported by IBM, put out at Sun's continued control of Java, and it happened to be an implementation that used a JVM called Dalvik, whose libraries were picked up initially by Google for Android.

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