jtreg has support for running individual JUnit and TestNG test methods through the use of a 'query string' that is appended to the end of the name of a test, prefixed by a '?' character. Currently, only a method name is supported as a query string.

There are however 2 issues with this:

1.) Due to the way JUnit works, passing only the method name means JUnit will look for a method that has no parameters. This means that running parameterized tests is currently not supported.
2.) JUnit has the concept of nested test classes (annotated with @Nested). However, it's currently not possible to run individual nested test classes.

We can enhance the format of the query string to allow selecting nested test classes and parameterized tests as well.