Which came first, Java or TikTok?

Java came first, by 21 years. Sun Microsystems announced Java publicly.

Side by side

Java

Java was announced in May 1995, having started in 1991 as a project called Oak aimed at interactive television — a market that did not exist yet. Its promise was "write once, run anywhere", achieved by compiling to bytecode for a virtual machine rather than to a specific processor. JavaScript arrived seven months later and was named after it purely as a marketing decision; the two languages are unrelated.

TikTok

The app launched in China as Douyin in September 2016 and internationally as TikTok in 2017. What made it global was the 2018 acquisition and merger of Musical.ly, a lip-sync app that had launched in 2014 and already had a large Western user base — so part of TikTok is two years older than TikTok. Douyin and TikTok remain separate apps on separate infrastructure.