This is necessary, though, in other contexts. Or accounting for interfaces (mostly because they can declare static methods now): List> classes = new ArrayList() įor (Class c = obj.getClass() c != null c = c.getSuperclass())Ĭollections.addAll(classes, obj.getClass().getInterfaces()) Īnd as a side note, you probably don't need to call m.setAccessible(true), because you're invoking it from within the class that declares it. In order to really manipulate the behavior a method (like: add automated tracing/logging code. In Java, ('bar') declares a checked exception of type NoSuchMethodException (among others). They are markers that are 'evaluated' by some sort of component (either the compiler at compile time, or some framework at run time) and trigger activity in that component. Remember, that all generic arguments are stripped out on compilation, so a Map simply becomes a Map when doing reflection at runtime.The call to get the method is here: if (ntainsKey(K)) while ((c = c.getSuperclass()) != null) Thrown when the VM notices that a program tries to reference, on a class or object, a method that does not exist. Meaning: java annotations aren't about adding functionality 'into' methods. You can use getClassName and getMethodName (), to get the class and method name, and then use reflection to get the annotation. I think your problem is that you give a HashMap class instance as an argument to getDeclaredMethod while the method actually accepts Map class instance. Any advice, or another way to call a method in the same class given only a String name of the method? ![]() ![]() I am experiencing a NoSuchMethodException when trying to call getMethod on a method in the same class with no arguments from a string name pulled from a hashmap.
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