> 2015. 8. 29., 오후 10:40, Kyung Koo Yoon <yoonf...@gmail.com> 작성: > > Hi, Jochen. > > -- > -------------------- > Software Innovation Driver yoonforh at gmail dot com > Analyze, Reason, Reshape the Question > PGP http://www.javadom.com/personal/yoonforhatgmaildotcom.asc > <http://www.javadom.com/personal/yoonforhatgmaildotcom.asc> >> 2015. 8. 29., 오후 10:01, Jochen Theodorou <blackd...@gmx.org >> <mailto:blackd...@gmx.org>> 작성: >> >> Am 29.08.2015 10:56, schrieb Kyung Koo Yoon: >>> Hi, all. >>> >>> The javadoc comment of java.lang.Class.getMethod API has following clause. >>> >>> @CallerSensitive >>> public Method getMethod(String name, Class<?>... parameterTypes) >>> throws NoSuchMethodException, SecurityException >>> >>> >>> "The {@code parameterTypes} parameter is an array of {@code Class} >>> objects that identify the method's formal parameter types, in declared >>> order. If {@code parameterTypes} is {@code null}, it is >>> treated as if it were an empty array." >>> >>> As you know the method signature changed to use varargs since JDK 1.5, >>> if parameterTypes is given null, the compiler will interpret the parameter >>> with “new Class[] { null }”. >> >> you are making a wrong assumption here. If null is given there will be >> no wrapping in an array. varargs are defined that there is no wrapping >> if the given argument type is compatible. For Class[] this is Class[] >> and of course null. Even if you had been right, you could still give >> produce a call with null by reflection or using the MethodHandles API > > You can check by simply decompiling the generated byte codes. > vararg is not a JVM feature so the compiler pre-processes and the compiler > handles the given null as array’s first element. > > Originally class.getMethod(“methodName”, null) should have meant a static > method, but with vararg, it’s not.
Sorry, static is not correct. should have meant a void method. > >> >> bye blackdrag >> >> -- >> Jochen "blackdrag" Theodorou >> blog: http://blackdragsview.blogspot.com/ >> <http://blackdragsview.blogspot.com/>
