mvn clean package

This is a command used in Maven, a popular build automation tool for Java projects.

The "clean" goal removes all files generated by the previous build, ensuring a clean slate for the current build.

The "package" goal compiles the source code, runs the tests, and creates a distributable package (such as a JAR file) containing the compiled code and any dependencies.

Together, "mvn clean package" is a command that cleans the project and creates a distributable package.