Find Java classes implementing an interface [duplicate]

Answer 1

You could also use the Extensible Component Scanner (extcos: http://sf.net/projects/extcos) and search all classes implementing an interface like so:

Set> classes = new HashSet>();

ComponentScanner scanner = new ComponentScanner();
scanner.getClasses(new ComponentQuery() {
    @Override
    protected void query() {
        select().
        from("my.package1", "my.package2").
        andStore(thoseImplementing(MyInterface.class).into(classes)).
        returning(none());
    }
});

This works for classes on the file system, within jars and even for those on the JBoss virtual file system. It's further designed to work within standalone applications as well as within any web or application container.