I found out about it earlier this year when trying to set up Android Studio on the computers at my former high school. I couldn't figure out why I kept getting

I found out about it earlier this year when trying to set up Android Studio on the computers at my former high school. I couldn't figure out why I kept getting an error about the JDK being missing until I realized Eclipse had its own compiler and that's how students had been able to compile their Java code for the past four years.