Using Java 8 with LibGDX
build.gradle, gradle, java, java-8, libgdx
Solution
If you're using IntelliJIDEA, make changes in three places.
`sourceCompatibility = 1.8` in build.gradle file of all modules
`Project Structure > Project > Language Level`
`Project Structure > Modules > Sources Tab on all modules > Language Level`
Problem
I'm writing a game in Java using LibGDX, with only `desktop` as the targeted platform. I just created a new LibGDX project, and imported some existing code into it, but now I'm getting a few errors. Specifically, using the `diamond operator`. For example, this line of code: ``` HashMap<String, Integer> connectionsMap = new HashMap<>(); ``` is generating this error: ``` Error:(20, 37) java: diamond operator is not supported in -source 1.6 (use -source 7 or higher to enable diamond operator) ``` Ideally, I'd like to use Java 8. The Gradle files in the module I imported were preserved, so I changed the `sourceCompatibility` line in all the other `build.gradle` files throughout the project from `1.6` to `1.8`, and I made sure that in the `Project Structure > Project > Language Level` was set to Java 8. However, I'm still getting this issue. What else do I need to change for my project to use Java 8?