Why does getdeclaredmethod not work in Java?
You specify a name in getDeclaredMethod but no parameter, although the Test method does have a parameter in its signature. Because the first argument of Method.invoke expects an object. However this argument is ignored in case of static methods: If the underlying method is static, then the specified obj argument is ignored. It may be null.
Why is my Javadoc throwing a nosuchmethodexception?
The Javadoc for getMethod isn’t explicit, but it looks like it might throw a NoSuchMethodException for methods that aren’t public, and your method is private. The versioning issue that can cause NoSuchMethodException isn’t a difference between the compiler versions.
When to use getmethod ( ) in Java reflection?
: ( Your method is private but getMethod () only returns public method. You need to use getDeclaredMethod (). You need the parameter list to be absolutely correct for the method you want for the call to succeed. I’ve found that tiny steps are important when doing reflection because the compiler doesn’t help.
You specify a name in getDeclaredMethod but no parameter, although the Test method does have a parameter in its signature. Because the first argument of Method.invoke expects an object. However this argument is ignored in case of static methods: If the underlying method is static, then the specified obj argument is ignored. It may be null.
When do you get a nosuchmethodexception in Java?
Java exception FAQ: What is a Java NoSuchMethodException? Answer: Using Java, you can get a NoSuchMethodException when you’re using reflection and try to dynamically use a method on a class, and the method does not actually exist. The following example Java class shows how this NoSuchMethodException can be generated:
: ( Your method is private but getMethod () only returns public method. You need to use getDeclaredMethod (). You need the parameter list to be absolutely correct for the method you want for the call to succeed. I’ve found that tiny steps are important when doing reflection because the compiler doesn’t help.