What are common mistakes developers make with jar tool?

// Common mistakes developers make with the JAR tool
// 1. Not Specifying the Main-Class in the Manifest File
// Example of a manifest file with Main-Class specified
Manifest-Version: 1.0
Main-Class: com.example.Main

// 2. Failing to Include Required Libraries
// Example command to include libraries
jar cvfm myapp.jar manifest.txt -C bin/ . -C lib/ .

// 3. Not Using Versioning
// Proper versioning in JAR naming
myapp-v1.0.jar, myapp-v1.1.jar

// 4. Forgetting Resources in the JAR
// Ensuring resources (like images and config files) are included
jar cvf resources.jar -C src/resources/ .