Lawyers for Google and Oracle have delivered closing arguments and the jury has been asked to decide whether the web giant is guilty of copyright infringement, before moving on to hear evidence about patent infringement.
Oracle claimed that the Android mobile platform violated its patents and copyright to Java, and is seeking roughly $1 billion in copyright damages.
Sun's leadership had supported Android, and Oracle decided against pursuing a smartphone of its own.
In court on Monday, Oracle attorney Michael Jacobs said the parts of Java software that Google copied took much creative talent to compose.
"It's kind of like creating a symphony," Jacobs said during his closing argument.
But Google attorney Robert Van Nest said Sun's leadership had supported Android, and Oracle decided against pursuing a smartphone of its own.
"It isn't until after they failed that they brought this lawsuit here," Van Nest said.
US District Judge William Alsup must also decide some of the copyright issues.
Oracle paid about $7.4 billion to buy Sun Microsystems, acquiring Java, the programming which is incorporated in Android smartphone technology, in the takeover.
The trial, which began earlier this month, is expected to last eight weeks.
The case in US District Court, Northern District of California, is Oracle America, Inc v. Google Inc, 10-3561.
