I would like to run JUnit test cases from the command line. How can I do this?
For JUnit 5.x it's:
java -jar junit-platform-console-standalone-<version>.jar <Options>
Find a brief summary at https://stackoverflow.com/a/52373592/1431016 and full details at https://junit.org/junit5/docs/current/user-guide/#running-tests-console-launcher
For JUnit 4.X it's really:
java -cp .:/usr/share/java/junit.jar org.junit.runner.JUnitCore [test class name]
But if you are using JUnit 3.X note the class name is different:
java -cp .:/usr/share/java/junit.jar junit.textui.TestRunner [test class name]
You might need to add more JARs or directories with your class files to the classpath and separate that with semicolons (Windows) or colons (UNIX/Linux). It depends on your environment.
Edit: I've added current directory as an example. Depends on your environment and how you build your application (can be bin/ or build/ or even my_application.jar etc). Note Java 6+ does support globs in classpath, you can do:
java -cp lib/*.jar:/usr/share/java/junit.jar ...
Hope it helps. Write tests! :-)