Please. I doubt Sun would have ever filed any of these lawsuits. They actually wanted people to use Java. I don't think it should matter that Oracle bought them or not: when Google implemented Java into Android Oracle didn't own Sun and Sun apparently didn't have a problem with what Google was doing. They were probably happy about it. By not suing, Sun set a precedent on the matter which Oracle shouldn't be able to change because of the purchase.
Also, all these silly patents Oracle acquired along with Sun were probably defensive-minded. It's no surprise that some of them are becoming invalidated with the scrutiny that comes with using them offensively to sue.
Expect to see the use of Java decline. If Sun had been this litigious about Java it probably would never have become as popular as it has. No one wants to worry about paying a tax to Oracle just for using a language for which many non-taxed alternatives exist.
I'm not a lawyer. Maybe the law is actually on Oracle's side, but that doesn't make it right.
