UnsuppotedOperationException.getCause returns itself

Question

I have the following java code in android

Method getIfaceMethod =
            service.getClass().getDeclaredMethod("getIface", new Class<?>[0]);
getIfaceMethod.invoke(param1)));

Sometimes an exception occurs when he cannot call the method through reflection. The exception thrown is an UnspportedOperationException. The strange thing is that when I call getCause, it returns itself - take a look at the screenshot from the debugger:

What the heck??

Answer 1

If you look at the source code Throwable , you will see that the default value for the variable causeis equal this, that the reason for this exception has not yet been initialized.

getCause() Throwable, , null, cause . , (!) cause , .