Google's arguments fail
As a basic copyright issue, google's argument fails for the following reasons:
1) oracle owns the java community. While they cannot claim copyright ownership over third party java applications,
they still can claim ownership of the java community.
2) google cannot claim that reimplementation of java api is required for smartphones to work. There exists smartphone platforms
that do not have java apis available, thus killing google's theory that there is only one way to write those declarations.
3) google has history of skipping copyright's limitations and explicitly trying to bypass copyright rules. For example their book scanning operation.
this java api issue is similar google operation where they simply do not care enough about following established rules.
Thus oracle should be on the winning side of this argument.
