import java.lang.reflect.Method;

import java.lang.reflect.InvocationTargetException;

class X{

public void objectMethod(String arg){

System.out.println("Instance method: " + arg);

}

public static void classMethod(){

System.out.println("Class method.");

}

}

public class MethodInvocationDemo{

public static void main(String[] args){

try{

Class<?> clazz = Class.forName("X");

X x = (X)clazz.newInstance();

Method method = clazz.getMethod("objectMethod", new Class[]{String.class});

method.invoke(x, "This is method argument.");

method = clazz.getMethod("classMethod", (Class[])null); // (Class[])null is equivalent to the empty array.

method.invoke(null, (Object[])null); // second parameter is equivalent to an empty array. It is prefered instead of an empty array's allocation.

}catch(ClassNotFoundException cnfe){

cnfe.printStackTrace();

}catch(InstantiationException ie){

ie.printStackTrace();

}catch(NoSuchMethodException nsme){

nsme.printStackTrace();

}catch(IllegalAccessException iae){

iae.printStackTrace();

}catch(InvocationTargetException ite){

ite.printStackTrace();

}

}

}