How do I invoke a Java method when given the method name as a string?

Question

If I have two variables:

Object obj;
String methodName = \"getName\";

Without knowing the class of obj, how can I call the met

Answer 1

Use method invocation from reflection:

Class c = Class.forName("class name");
Method method = c.getDeclaredMethod("method name", parameterTypes);
method.invoke(objectToInvokeOn, params);

Where:

• "class name" is the name of the class
• objectToInvokeOn is of type Object and is the object you want to invoke the method on
• "method name" is the name of the method you want to call
• parameterTypes is of type Class[] and declares the parameters the method takes
• params is of type Object[] and declares the parameters to be passed to the method