import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class Foo {      public void PRintamessage() {     System.out.println(toString()+":a message");     }     public void printAnotherMessage(String theString) {         System.out.println(toString()+":another message:" + theString);     }      public static void main(String[] args) {         Class c = null;         try {             c = Class.forName("Foo");             Method method1 = c.getDeclaredMethod("printAMessage", new Class[]{});             Method method2 = c.getDeclaredMethod("printAnotherMessage", new Class[]{String.class});             Object o = c.newInstance();             System.out.println("this is my instance:" + o.toString());             method1.invoke(o);             method2.invoke(o, "this is my message, From a config file, of course");         } catch (ClassNotFoundException e) {             e.printStackTrace();         } catch (NoSuchMethodException nsme){             nsme.printStackTrace();         } catch (IllegalAccessException iae) {             iae.printStackTrace();         } catch (InstantiationException ie) {             ie.printStackTrace();         } catch (InvocationTargetException ITe) {             ite.printStackTrace();         }     } }