Oracle is claiming that Android violated its copyright on parts of the Java programing language. Google said it should be able to use Java without paying a fee under the fair-use provision of copyright law. Oracle acquired Sun in 2010 and sued Google after negotiations broke down. The jury was deadlocked in a trial in 2012. If the current jury rules against Google on fair use, then it would consider Oracle's request for $9 billion in damages.
Google has argued that Sun welcomed Google's use of Java, but Oracle plotted to sue upon acquiring the company.
Oracle co-Chief Executive Safra Catz about emails from 2009, in which former Sun CEO Jonathan Schwartz described a dispute with Google over Java.
"He told us that they'd been talking with Google and had been trying to get them to license Java," said Catz, noting that Android was an unauthorized version of Java because Google did not have a license.
Oracle proceeded to acquire Sun, Catz said, because Java was too strategically important to Oracle's products for it to be bought by a rival.