A NBT library with extended data types support. There is also a editor to read/modify NBT files.
The following steps will ensure your project is cloned properly.
git clone https://github.com/LanternPowered/LanternNBT.gitcd LanternNBT
Note: If you do not have Gradle installed then use ./gradlew for Unix systems or Git Bash and gradlew.bat for Windows systems in place of any 'gradle' command.
In order to build LanternNBT you simply need to run the gradle build command. You can find the compiled JAR file in ./build/libs labeled similarly to 'lantern-nbt-x.x.x-SNAPSHOT.jar'.