Yeah. I'd like to know that too. I'm running openjdk-12 but my book is for java (1.)8. Why is Java lagging behind so much or is there just so little change? An

Yeah. I'd like to know that too. I'm running openjdk-12 but my book is for java (1.)8. Why is Java lagging behind so much or is there just so little change? Anyhow I have openjdk-8 installed separately for college and just experiment with what works between versions.