Happy Coding

Databases

So far, we’ve been keeping all of our data in memory, using data structures like ArrayList and HashMap. This is fine for small example projects, but it has a pretty huge downside: whenever your code is restarted (any time you make a change), all of your memory is reset and you lose all of your data.


This is a companion discussion topic for the original entry at https://happycoding.io/tutorials/java-server/databases