java - Find classes implementing an interface in Jar -


i want find whether classes inside jar has implemented particular interface or not. have implemented below code, iterates on classes inside jar file , finds on each class whether has implemented particular interface or not. 

    public static synchronized boolean findclassesinjar(final class<?> baseinterface, final string jarname){         final list<string> classestobereturned = new arraylist<string>();         if (!stringutils.isblank(jarname)) {             //jarname relative location of jar wrt.              final string jarfullpath = file.separator + jarname;             final classloader classloader = this.getclassloader();             jarinputstream jarfile = null;             urlclassloader ucl = null;             final url url = new url("jar:file:" + jarfullpath + "!/");             ucl = new urlclassloader(new url[] { url }, classloader);             jarfile = new jarinputstream(new fileinputstream(jarfullpath));             jarentry jarentry;             while (true) {                 jarentry = jarfile.getnextjarentry();                 if (jarentry == null)                     break;                 if (jarentry.getname().endswith(".class")) {                     string classname = jarentry.getname().replaceall("/", "\\.");                     classname = classname.substring(0, classname.length() - 6);                     if (!classname.contains("$")) {                         try {                             final class<?> myloadedclass = class.forname(classname, true, ucl);                             if (baseinterface.isassignablefrom(myloadedclass)) {                                 return true;                             }                         } catch (final classnotfoundexception e) {                          }                      }                 }             }         return false;     }

is there simple way ? because if have jar 100 class files , 100th class has implemented interface, through above code need iterate 100 class files , find whether has implemented interface or not. there efficient way of doing ?

the reflections library can that:

reflections reflections = new reflections(     classpathhelper.forpackage("your.root.package"), new subtypesscanner()); set<class<? extends yourinterface>> implementingtypes =      reflections.getsubtypesof(yourinterface.class);

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