Google has hit back at Oracle over what it calls a "baseless" lawsuit accusing the firm of infringing some Java patents in its Android operating system.
Oracle, which gained ownership of Java after acquiring Sun Microsystems last year, filed the papers at the end of last week.
The documents state that Google "knowingly, directly and repeatedly infringed Oracle's Java-related intellectual property" when developing Android, and that the lawsuit "seeks appropriate remedies".
However, a Google spokesperson said that the company will "strongly defend open source standards, and will continue to work with the industry to develop the Android platform".
"We are disappointed Oracle has chosen to attack both Google and the open source Java community with this baseless lawsuit," the firm added.
"The open source Java community goes beyond any one corporation, and works every day to make the web a better place."
The case could mark a key stage in the development of Android, according to Florian Mueller, founder of the NoSoftwarePatents campaign.
Mueller explained that, should Google choose to settle with Oracle on the issue, it would limit opportunities for other developers working with open source technology.
Cotton seedling freezes to death as Chang'e-4 shuts down for the Moon's 14-day lunar night
Fortnite easily out-earns PUBG, Assassin's Creed Odyssey and Red Dead Redemption 2 in 2018
Meteor showers as a service will be visible for about 100 kilometres in all directions
Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago